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Yanagisawa R, Koike E, Win-Shwe TT, Kawaguchi M, Takano H. Impact of dietary exposure to low-dose tris(1,3-dichloro-2-propyl)phosphate in allergic asthmatic mice. Immunopharmacol Immunotoxicol 2021; 43:599-610. [PMID: 34388063 DOI: 10.1080/08923973.2021.1959609] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Tris(1,3-dichloro-2-propyl)phosphate (TDCIPP) is an organophosphorus flame retardant that is an alternative to brominated flame retardants. Although TDCIPP can adversely affect human health, information about its effects on immune and allergic responses is scarce. We aimed to investigate the effects of dietary exposure to TDCIPP using less than the human tolerable daily intake (TDI) in allergic asthmatic mice. METHODS Male C3H/HeJSlc mice were fed a chow diet containing TDCIPP equivalent to 0.02 μg/kg/day (low; L), 0.2 μg/kg/day (medium; M), or 2 μg/kg/day (high; H) and were intratracheally administered ovalbumin (OVA, 1 μg/animal) every 2 weeks from 5 to 11 weeks of age. RESULTS In OVA-treated mice, TDCIPP-H exposure tended to enhance pulmonary inflammation compared with vehicle exposure. TDCIPP dose-dependently decreased mRNA level of G protein-coupled estrogen receptor (GPER) in the lungs with or without OVA. OVA + TDCIPP-H treatment tended to increase the total cell number and promoted CD4+ cell activation compared with OVA alone treatment in mediastinal lymph nodes. In splenocytes, an increase in the fraction of Breg cells, but not of total B and T cells, and an increase in IL-5 in cell culture supernatants following OVA re-stimulation in OVA + TDCIPP-H-treated mice was observed compared with OVA-alone-treated mice. Moreover, OVA + TDCIPP-H exposure decreased Gr-1 expression in bone marrow (BM) cells. DISCUSSION These results suggested that dietary exposure to TDCIPP at TDI level slightly enhances allergic diseases, such as allergic asthma, via GPER regulation at inflamed sites and secondary lymphoid tissue and BM cell alternations.
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Affiliation(s)
- Rie Yanagisawa
- Health and Environmental Risk Division, National Institute for Environmental Studies, Tsukuba, Japan
| | - Eiko Koike
- Health and Environmental Risk Division, National Institute for Environmental Studies, Tsukuba, Japan
| | - Tin-Tin Win-Shwe
- Health and Environmental Risk Division, National Institute for Environmental Studies, Tsukuba, Japan
| | - Maiko Kawaguchi
- Graduate School of Agriculture, Meiji University, Kawasaki, Japan
| | - Hirohisa Takano
- Graduate School of Global Environmental Studies, Kyoto University, Kyoto, Japan
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Hou M, Shi Y, Cai Y. [Determination of 16 organophosphate esters in human blood by high performance liquid chromatography-tandem mass spectrometry combined with liquid-liquid extraction and solid phase extraction]. Se Pu 2021; 39:69-76. [PMID: 34227360 PMCID: PMC9274832 DOI: 10.3724/sp.j.1123.2020.07033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Measurement of organophosphate esters (OPEs) in human body fluids is important for understanding human internal exposure to OPEs and for assessing related health risks. Most of the current studies have focused on the determination of OPE metabolites in human urine, as OPEs are readily metabolized into their diester or hydroxylated forms in the human body. However, given the existence of one metabolite across multiple OPEs or multiple metabolites of one OPE, as well as the low metabolic rates of several OPEs in in vitro studies, the reliability of urinary OPE metabolites as biomarkers for specific OPEs is needs to be treated with caution.Human blood is a matrix that is in contact with all body organs and tissues, and the blood levels of compounds may better represent the doses that reach target tissues. Currently, only a few studies have investigated the occurrence of OPEs in human blood by different analytical methods, and the variety of OPEs considered is limited. In this study, a method based on liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed for the simultaneous determination of 16 OPEs in human blood, and the extraction efficiency of the solid phase extraction (SPE) column for OPEs was verified. To human blood samples, 10 ng of an internal standard was added, followed by mixing and aging for 30 min. The samples were extracted three times with acetonitrile using a shaker, and then purified on ENVI-18 cartridges with acetonitrile containing 25% dichloromethane as the eluent. Finally, the OPEs were analyzed by high performance liquid chromatography-tandem mass spectrometry. After optimization of the analytical column and mobile phases, the analytes were separated on a BEH C18 column (100 mm×2.1 mm, 1.7 μm) by gradient elution using methanol and 5 mmol/L ammonium acetate in water as the mobile phase. Then, the analytes were ionized in electrospray ionization positive (ESI+) mode and detected in the multiple reaction monitoring (MRM) mode. The mass spectral parameters, including the precursor ion, product ion, declustering potential, entrance potential, and collision cell exit potential, were optimized. The results were quantified by the internal standard method. The limits of detection (LOD, S/N=3) of the OPEs were in the range of 0.0038-0.882 ng/mL. The calibration curves for the 16 OPEs showed good linear relationships in the range of 0.1-50 ng/mL, and the correlation coefficients were >0.995. The extraction efficiency of the ENVI-18 column for the 16 OPEs was validated, and the average recoveries of the target compounds were 54.6%-104%. The average recoveries (n=3) of 15 OPEs, except trimethyl phosphate (TMP), in whole blood at three spiked levels were in the range of 53.1%-126%, and the relative standard deviations (RSDs) were in the range of 0.15%-12.6%. The average recoveries of six internal standards were in the range of 66.8%-91.6% except for TMP-d9 (39.1%), with RSDs of 3.52%-6.85%. The average matrix effects of the OPEs in whole blood were 56.4%-103.0%. Significant matrix effects were found for resorcinol bis(diphenyl phosphate) (RDP) (75.8%±1.4%), trimethylphenyl phosphate (TMPP) (68.4%±1.0%), 2-ethylhexyl di-phenyl phosphate (EHDPP) (56.4%±12.4%), and bisphenol-A bis(diphenyl phosphate) (BABP) (58.5%±0.4%). However, these effects could be corrected by similar signal suppressions of the corresponding internal standard (TPHP-d15, 77.4%±7.5%). This method is simple, highly sensitive, and suitable for the determination of OPEs in human blood. Fifteen human whole blood samples were collected to quantify the 16 OPEs using the developed method. The total concentrations of the OPEs ranged from 1.50 to 7.99 ng/mL. The detection frequencies of eight OPEs were higher than 50%. Tri-iso-butyl phosphate (TiBP), tri(2-chloroethyl) phosphate (TCEP), and tri(1-chloro-2-propyl) phosphate (TCIPP) were the dominant OPEs, with median concentrations of 0.813, 0.764, and 0.690 ng/mL, respectively. These results indicated widespread human exposure to OPEs, which should be of concern.
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Affiliation(s)
- Minmin Hou
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100083, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yali Shi
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100083, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yaqi Cai
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100083, China.,University of Chinese Academy of Sciences, Beijing 100049, China
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Gwon HR, Oh HJ, Chang KH, Isobe T, Lee SY, Kim JH, You SJ, Kim JG, Kim JW. Occurrence, distribution, and potential exposure risk of organophosphate flame retardants in house dust in South Korea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 770:144571. [PMID: 33515873 DOI: 10.1016/j.scitotenv.2020.144571] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/11/2020] [Accepted: 12/13/2020] [Indexed: 06/12/2023]
Abstract
Concentrations of organophosphate flame retardants (OPFRs), which are used in various plastic products, were analyzed in house dust samples collected from three Korean cities (Suwon, n = 23; Jeonju, n = 20; Kunsan, n = 42). OPFRs, including tris (2-chloroethyl) phosphate (TCEP), tris (2-chloroisopropyl) phosphate (TCPP), and tris (1,3-dichloro-2-propyl) phosphate (TDCPP), were detected in 95%-100% of the samples analyzed, suggesting the widespread use of these compounds in Korea. The levels of TCEP, TCPP, and TDCPP in Suwon, Jeonju, and Kunsan ranged from the limit of quantitation to 46,000, 28,000, and 2400 ng/g, respectively. The concentrations of all OPFRs were significantly higher in house dust samples from Suwon than from Jeonju and Kunsan; this is likely due to the increased use of these compounds in Suwon, which may be associated with the number, volume, and variety of household products in homes. In Korean homes, the estimated daily intake (EDI) of OPFRs through house dust ingestion was lower than the guideline values; however, the EDI of OPFRs for toddlers was 30-fold greater than for adults, suggesting a limited risk to human health. This is the first comprehensive study of the occurrence and distribution of OPFRs in house dust in Korea.
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Affiliation(s)
- Hye-Ryeon Gwon
- Department of Environmental Engineering, Kunsan National University, Daehak-ro 558, Kunsan-si, Jeollabuk-do 541-50, South Korea
| | - Hye-Ji Oh
- Department of Environmental Science and Engineering, Kyung Hee University, Seochen-dong 1, Giheung-gu, Yongin-si, Gyeonggi-do, South Korea
| | - Kwang-Hyeon Chang
- Department of Environmental Science and Engineering, Kyung Hee University, Seochen-dong 1, Giheung-gu, Yongin-si, Gyeonggi-do, South Korea
| | - Tomohiko Isobe
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Japan
| | - Suk-Yeon Lee
- Faculty of Marine Applied Biosciences, Kunsan National University, Daehak-ro 558, Kunsan-si, Jeollabuk-do, South Korea
| | - Ju-Hyoung Kim
- Faculty of Marine Applied Biosciences, Kunsan National University, Daehak-ro 558, Kunsan-si, Jeollabuk-do, South Korea
| | - Sun-Jae You
- Department of Environmental Engineering, Kunsan National University, Daehak-ro 558, Kunsan-si, Jeollabuk-do 541-50, South Korea
| | - Jong-Gu Kim
- Department of Environmental Engineering, Kunsan National University, Daehak-ro 558, Kunsan-si, Jeollabuk-do 541-50, South Korea
| | - Joon-Woo Kim
- Jeonbuk Regional Environment Office, Ministry of Environment, 120 Anjeon-ro, Deokjin-gu, Jeonju-si, Jeollabuk-do, South Korea.
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Kim K, Shin HM, Wong L, Young TM, Bennett DH. Temporal variability of indoor dust concentrations of semivolatile organic compounds. INDOOR AIR 2021; 31:693-701. [PMID: 33022817 PMCID: PMC8021600 DOI: 10.1111/ina.12759] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 08/06/2020] [Accepted: 09/30/2020] [Indexed: 05/12/2023]
Abstract
The determinants of the temporal variability of indoor dust concentrations of semivolatile organic compounds (SVOCs) remain mostly unexplored. We examined temporal variability of dust concentrations and factors affecting dust concentrations for a wide range of SVOCs. We collected dust samples three times from 29 California homes during a period of 22 months and quantified concentrations of 47 SVOCs in 87 dust samples. We computed intraclass correlation coefficients (ICCs) using three samples collected within the same house. We calculated correlation coefficients (r) between two seasons with similar climate (spring and fall) and between two seasons with opposite climate (summer and winter). Among 26 compounds that were detected in more than 50% of the samples at all three visits, 20 compounds had ICCs above 0.50 and 6 compounds had ICCs below 0.50. For 19 out of 26 compounds, correlation coefficients between spring and fall (r = 0.48-0.98) were higher than those between summer and winter (r = 0.09-0.92), implying seasonal effects on dust concentrations. Our study showed that within-home temporal variability of dust concentrations was small (ICC > 0.50) for most SVOCs, but dust concentrations may vary over time for some SVOCs with seasonal variations in source rates, such as product use.
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Affiliation(s)
- Kyunghoon Kim
- Department of Earth and Environmental Sciences, University of Texas, Arlington, TX, USA
| | - Hyeong-Moo Shin
- Department of Earth and Environmental Sciences, University of Texas, Arlington, TX, USA
| | - Luann Wong
- Department of Civil and Environmental Engineering, University of California, Davis, CA, USA
| | - Thomas M. Young
- Department of Civil and Environmental Engineering, University of California, Davis, CA, USA
| | - Deborah H. Bennett
- Department of Public Health Sciences, University of California, Davis, CA, USA
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Qin RX, Tang B, Zhuang X, Lei WX, Wang MH, Zhang LH, Hu KM. Organophosphate flame retardants and diesters in the urine of e-waste dismantling workers: associations with indoor dust and implications for urinary biomonitoring. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2021; 23:357-366. [PMID: 33511973 DOI: 10.1039/d0em00439a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Indoor dust ingestion is one of the main pathways for human exposure to organophosphate flame retardants (PFRs). The urinary concentrations of diesters (DAPs) are usually used as biomarkers to assess human exposure to PFRs. In this study, the PFR and DAP levels were measured in morning and evening urine samples of 30 workers from an e-waste dismantling site in southern China. The indoor dust samples were also collected from workshops and houses for analyzing associations between PFR and DAP levels in urine and dust. Tris(1-chloro-2-propyl) phosphate (TCIPP) and triphenyl phosphate (TPHP) were the dominant PFRs in dust, while bis(2-chloroethyl) phosphate (BCEP) and diphenyl phosphate (DPHP) were the major DAPs in dust. A significant positive correlation was observed between TPHP and DPHP concentrations in dust (p < 0.001), suggesting their potentially same source and the degradation of TPHP to form DPHP. TCIPP and tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) were the predominant PFRs, and BCEP, bis(1,3-dichloro-2-propyl) phosphate (BDCIPP), and DPHP were the main DAPs in both the morning and evening urine samples. The DPHP levels in evening urine samples were significantly correlated with TPHP and DPHP levels (p < 0.01) in dust. A similar correlation was found for the BCEP levels in the evening urine samples and the TCEP and BCEP levels (p < 0.01) in dust. These results indicated that in addition to being biotransformed from their respective parent PFRs, direct ingestion from indoor dust could also be the potential source for urinary DPHP and BCEP. Since relatively low detection frequencies were observed for bis(1-chloro-2-propyl) phosphate (BCIPP) and bis(butoxyethyl) phosphate (BBOEP) in urine, they may not be the major metabolites of TCIPP and tris(2-butoxyethyl) phosphate (TBOEP), respectively, in the human body. However, BDCIPP can be considered a useful biomarker because it is a unique metabolite of TDCIPP and has high detection frequencies in urine samples. The results of this study indicated the limitations of solely using urinary DAPs as biomarkers for the evaluation of human exposure to PFRs, and certain PFRs as well as hydroxylated PFRs (OH-PFRs) should also be considered for urinary biomonitoring in future studies.
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Affiliation(s)
- Rui-Xin Qin
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, P. R. China. and School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an, 710048, P. R. China
| | - Bin Tang
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, P. R. China.
| | - Xi Zhuang
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, P. R. China.
| | - Wei-Xiang Lei
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, P. R. China.
| | - Mei-Huan Wang
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, P. R. China.
| | - Luo-Hong Zhang
- School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an, 710048, P. R. China
| | - Ke-Mei Hu
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, P. R. China.
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56
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Yan H, Hales BF. Effects of an Environmentally Relevant Mixture of Organophosphate Esters Derived From House Dust on Endochondral Ossification in Murine Limb Bud Cultures. Toxicol Sci 2021; 180:62-75. [PMID: 33367866 PMCID: PMC7916738 DOI: 10.1093/toxsci/kfaa180] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Organophosphate esters (OPEs) are used widely as flame retardants and plasticizers but much remains unknown about their potential toxicity. Previously, we reported that 4 individual OPEs suppress endochondral ossification in murine limb bud cultures. However, real-life exposure is to complex OPE mixtures. In the present study, we tested the hypothesis that a Canadian household dust-based OPE mixture will affect endochondral ossification in gestation day 13 CD1 mouse embryo limb buds expressing fluorescent markers for the major cell populations involved in the process: collagen type II alpha 1-enhanced cyan fluorescent protein (proliferative chondrocytes), collagen type X alpha 1-mCherry (hypertrophic chondrocytes), and collagen type I alpha 1-yellow fluorescent protein (osteoblasts). Limbs were cultured for 6 days in the presence of vehicle or dilutions of the OPE mixture (1/1 000 000, 1/600 000, and 1/300 000). All 3 OPE mixture dilutions affected cartilage template development and the progression of endochondral ossification, as indicated by the fluorescent markers. The expression of Sox9, the master regulator of chondrogenesis, was unchanged, but the expression of Runx2 and Sp7, which drive chondrocyte hypertrophy and osteoblastogenesis, was dilution-dependently suppressed. RNA-seq revealed that exposure to the 1/300 000 dilution of the OPE mixture for 24 h downregulated 153 transcripts and upregulated 48 others by at least 1.5-fold. Downregulated transcripts were enriched for those related to the immune system and bone formation. In contrast, upregulated transcripts were enriched for those with stress response functions known to be regulated by ATF4 activation. Thus, exposure to the mixture of OPEs commonly found in house dust may have adverse effects on bone formation.
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Affiliation(s)
- Han Yan
- Department of Pharmacology & Therapeutics, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - Barbara F Hales
- Department of Pharmacology & Therapeutics, McGill University, Montreal, Quebec H3G 1Y6, Canada
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57
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Zhou P, Zheng T, Li Y, Zhang X, Feng J, Wei Y, Wang H, Yao Y, Gong F, Tian W, Sun L, Liu Z, Zhao B, Yu D. Chlorinated Flame-Retardant Dechlorane 602 Potentiates Type 2 Innate Lymphoid Cells and Exacerbates Airway Inflammation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:1099-1109. [PMID: 33377767 DOI: 10.1021/acs.est.0c03758] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Chlorinated flame-retardant dechloranes are emerging substitutes for restricted flame retardants. Recent studies have demonstrated that they are accumulated in wildlife and detectable in humans; however, their effects on human health are poorly understood. Here, for the first time, we revealed that widely used chlorinated flame-retardant dechlorane 602 (Dec 602) exacerbated airway inflammation in two mouse models induced by house dust mite (HDM) or IL-33, respectively. Deteriorated airway inflammation by Dec 602 was associated with a higher production of type 2 cytokines including IL-4, IL-5, and IL-13, and IgE, accompanied by enhanced mRNA expression of proinflammatory cytokines such as TNF-α and IL-6. Mechanistically, we found that Dec 602 directly potentiated mouse and human group 2 innate lymphoid cells and, as such, promoted airway inflammation even in the absence of conventional T cells in Rag -/- mice. These findings provide novel immunological insights necessary for further studies of the health impact of emerging flame-retardant dechloranes including Dec 602.
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Affiliation(s)
- Pengcheng Zhou
- Laboratory of Immunology for Environment and Health, School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
- Department of Immunology and Infectious Disease, The John Curtin School of Medical Research, Australian National University, Canberra, ACT 0200, Australia
- The University of Queensland Diamantina Institute, Translational Research Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4102, Australia
| | - Ting Zheng
- Laboratory of Immunology for Environment and Health, School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Yunping Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100864, China
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| | - Xin Zhang
- Department of Rheumatology and Immunology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Jinhong Feng
- Laboratory of Immunology for Environment and Health, School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Yunbo Wei
- Laboratory of Immunology for Environment and Health, School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Hao Wang
- Department of Immunology and Infectious Disease, The John Curtin School of Medical Research, Australian National University, Canberra, ACT 0200, Australia
| | - Yin Yao
- Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430030, China
- The University of Queensland Diamantina Institute, Translational Research Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4102, Australia
| | - Fang Gong
- Department of Laboratory Medicine, Affiliated Hospital of Jiangnan University, Wuxi 214122, China
| | - Wenjing Tian
- Laboratory of Immunology for Environment and Health, School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Lingyun Sun
- Department of Rheumatology and Immunology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Zheng Liu
- Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Bin Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100864, China
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| | - Di Yu
- Laboratory of Immunology for Environment and Health, School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
- Department of Immunology and Infectious Disease, The John Curtin School of Medical Research, Australian National University, Canberra, ACT 0200, Australia
- The University of Queensland Diamantina Institute, Translational Research Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4102, Australia
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Tang B, Xiong SM, Zheng J, Wang MH, Cai FS, Luo WK, Xu RF, Yu YJ. Analysis of polybrominated diphenyl ethers, hexabromocyclododecanes, and legacy and emerging phosphorus flame retardants in human hair. CHEMOSPHERE 2021; 262:127807. [PMID: 32763577 DOI: 10.1016/j.chemosphere.2020.127807] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 07/10/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
Human hair has been identified as a non-invasive alternative matrix for assessing the human exposure to specific organic contaminants. In the present study, a solvent-saving analytical method for the simultaneous determination of 8 polybrominated diphenyl ethers (PBDEs), 3 hexabromocyclododecanes (HBCDDs), 12 phosphorus flame retardants (PFRs), and 4 emerging PFRs (ePFRs) has been developed and validated for the first time. Hair sample preparation protocols include precleaning with Milli-Q water, digestion with HNO3/H2O2 (1:1, v/v), liquid-liquid extraction with hexane:dichloromethane (4:1, v/v), and fractionation and cleanup on a Florisil cartridge. The method was validated by using two levels of spiked hair samples of 3 replicates for each spiking group. Limits of quantification (LOQs) were 0.12-22.4 ng/g for all analytes, average values of accuracies were ranging between 88 and 115%, 82-117%, 81-128%, and 81-95% for PBDEs, HBCDDs, PFRs, and ePFRs, respectively; and precision was also acceptable (RSD < 20%) for all analytes. Eventually, this method was applied to measure the levels of the targeted analytes in hair samples of e-waste dismantling workers (n = 14) from Qingyuan, South China. Median values ranged between 3.00 and 18.1 ng/g for PBDEs, 0.84-4.04 ng/g for HBCDDs, 2.13-131 ng/g PFRs, and 1.49-29.4 ng/g for ePFRs, respectively. PFRs/ePFRs constitute the major compounds in human hair samples, implying the wide use of PFRs/ePFRs as replacements of PBDEs and HBCDDs, as well the potential high human exposure risks of PFRs/ePFRs. Overall, this work will allow to a comprehensive assessment of human exposure to multiple groups of FRs using hair as a non-invasive bioindicator.
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Affiliation(s)
- Bin Tang
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, PR China
| | - Shi-Mao Xiong
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, PR China; School of Public Health, Key Laboratory of Environmental Pollution and Disease Monitoring of Ministry of Education, Guizhou Medical University, Guiyang, 550000, PR China
| | - Jing Zheng
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, PR China; School of Public Health, Key Laboratory of Environmental Pollution and Disease Monitoring of Ministry of Education, Guizhou Medical University, Guiyang, 550000, PR China.
| | - Mei-Huan Wang
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, PR China
| | - Feng-Shan Cai
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, PR China
| | - Wei-Keng Luo
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, PR China
| | - Rong-Fa Xu
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, PR China
| | - Yun-Jiang Yu
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, PR China.
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59
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Hou M, Shi Y, Na G, Cai Y. A review of organophosphate esters in indoor dust, air, hand wipes and silicone wristbands: Implications for human exposure. ENVIRONMENT INTERNATIONAL 2021; 146:106261. [PMID: 33395927 DOI: 10.1016/j.envint.2020.106261] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/30/2020] [Accepted: 11/02/2020] [Indexed: 05/14/2023]
Abstract
The ubiquity of organophosphate esters (OPEs) in various environmental matrices inevitably pose human exposure risks. Numerous studies have investigated human exposure pathways to OPEs, including air inhalation, dust ingestion, dermal contact, and dietary and drinking water intake, and have indicated that indoor dust and indoor air routes are frequently the two main human exposure pathways. This article reviews the literature on OPE contamination in indoor air and dust from various microenvironments and on OPE particle size distributions and bioavailability in dust conducted over the past 10 years. Ways in which sampling strategies are related to the uncertainty of exposure assessment results and comparability among different studies in terms of sampling tools, sampling sites, and sample types are addressed. Also, the associations of OPEs in indoor dust/air with human biological samples were summarized. Studies on two emerging matrices, hand wipes and silicone wristbands, are demonstrated to be more comprehensive and accurate in reflecting personal human exposure to OPEs in microenvironments and are summarized. Given the direct application of some diester OPEs (di-OPEs) in numerous products, research on their existence in indoor dust and food and on their effects on human urine are also discussed. Finally, related research trends and avenues for future research are prospected.
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Affiliation(s)
- Minmin Hou
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing, 100083, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yali Shi
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing, 100083, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Guangshui Na
- National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Yaqi Cai
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing, 100083, China; School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China; University of Chinese Academy of Sciences, Beijing 100049, China
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Modified organophosphorus fire retardant with low toxicity/high flame retardancy using the pharmacophore model associated with Mamdani fuzzy inference approach. Biochem J 2020; 477:4655-4674. [PMID: 33216871 DOI: 10.1042/bcj20200779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 11/09/2020] [Accepted: 11/20/2020] [Indexed: 11/17/2022]
Abstract
The bi-directional selective low toxicity/high flame retardancy organophosphorus fire retardants (OPFRs) derivatives were designed by a comprehensive effect 3D quantitative structure-activity relationship (QSAR) pharmacophore model, and the toxicity and flame retardancy mechanism of OPFR derivatives were explored. The 3D-QSAR comprehensive pharmacophore model was constructed using the toxicity/flame retardancy comprehensive evaluation values of OPFRs for molecular modifications, which were obtained by the Mamdani fuzzy inference approach. The environment-friendly OPFR derivatives (CDPP-F, CDPP-NO2, TPHP-F, TDCIPP-CH2CH3, and TDCIPP-Br) with high flame retardancy showed significantly reduced multi-toxicity effects (biotoxicity, reproductive toxicity, and neurotoxicity) in the comprehensive model. The spatial overlapping volumes of the toxicity/flame retardancy comprehensive effect model with the toxic effect and with flame retardant effect were 1 : 1. The trend (1 : 1) was similar to the degree of improvement of toxicity and flame retardancy of the OPFR derivatives. The toxicity and flame retardancy were decreased by more than 50%. This indicated that the spatial overlapping volumes in the comprehensive model with the toxic and flame retardant mono-models have significant effects. Based on the 2D-QSAR model, molecular docking, and density functional theory, it was found that, in molecular modification, the introduction of electronegative groups to improve the electronic parameters (q+) can reduce the toxicity of OPFRs. An increase in the bond length and bond angle of the molecular side chain increased the steric parameter (MR) that improved the molecular flame retardancy of OPFRs.
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Sun Y, Guo JQ, Liu LY, Sverko E, Zhang Z, Tian CG, Huo CY, Li HL, Ma WL, Zhang ZF, Song WW, Li YF, Wang L. Seasonal variation and influence factors of organophosphate esters in air particulate matter of a northeastern Chinese test home. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 740:140048. [PMID: 32559539 DOI: 10.1016/j.scitotenv.2020.140048] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 06/03/2020] [Accepted: 06/05/2020] [Indexed: 06/11/2023]
Abstract
To investigate the seasonal variation of organophosphate esters (OPEs) in air particulate matter (PM) and the corresponding influence factors in indoor environment, 104 indoor PM samples were collected in a test home, Harbin, China, from March 2017 to March 2018. The Σ12OPEs concentrations ranged from 0.41 ng/m3 to 940 ng/m3. Tris(1-chloro-2-propyl) phosphate (TCIPP) was the most abundant OPE and accounted for 83.2% of the total OPEs. The Σ12OPEs concentrations in spring and summer were higher than those in autumn and winter. Outdoor total suspended particles (TSP) were the main factor that affected the concentration variation of OPEs in PM samples in the test home. Comparisons of the gas/particle (G/P) partitioning equilibrium models indicated that the Dachs-Eisenreich (D-E) model estimates were more reliable than the other models in this study. The particle fractions of OPEs with log KOA > 10.51 that predicted by all four models generally well matched the measured OPE particle fractions in the literatures. To OPEs with lower molecular weight, inhalation was the main exposure route and ingestion contributed mostly to OPEs with higher molecular weight. In addition, the estimated daily intakes (EDIs) and carcinogenic risks (CRs) posed by OPEs were all below the recommended values, indicating that the current OPE levels in the test home were within the safe thresholds.
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Affiliation(s)
- Yu Sun
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS)/International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
| | - Jia-Qi Guo
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS)/International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
| | - Li-Yan Liu
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS)/International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China.
| | - Ed Sverko
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS)/International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China; IJRC-PTS-NA, Toronto M2N 6X9, Canada
| | - Zhi Zhang
- College of Agricultural Resource and Environment, Heilongjiang University, Harbin 150080, China
| | - Chong-Guo Tian
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, CAS, Yantai 264003, China
| | - Chun-Yan Huo
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS)/International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
| | - Hai-Ling Li
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS)/International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
| | - Wan-Li Ma
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS)/International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
| | - Zi-Feng Zhang
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS)/International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
| | - Wei-Wei Song
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS)/International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
| | - Yi-Fan Li
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS)/International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China; IJRC-PTS-NA, Toronto M2N 6X9, Canada
| | - Li Wang
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
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Wei B, O’Connor RJ, Goniewicz ML, Hyland A. Emerging Chemicals of Health Concern in Electronic Nicotine Delivery Systems. Chem Res Toxicol 2020; 33:2637-2646. [PMID: 32880169 PMCID: PMC7582622 DOI: 10.1021/acs.chemrestox.0c00281] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Indexed: 11/28/2022]
Abstract
Electronic nicotine delivery systems (ENDS), by virtue of their highly engineered construction (plastics, glass, e-liquids), may contain a number of emerging chemicals of concern (ECCs), including phthalates, phenolic compounds, and flame retardants. Current knowledge regarding the safety of ENDS may underestimate the health risks from ECCs. In this study, we examined the types and levels of those three groups of chemicals in the components and parts of ENDS devices, including refill liquids, tanks/cartridges, atomizers, drip tips/mouthpieces, and sealing materials. Our results suggest that phthalates were the most prevalent chemicals in all tested samples, followed by parabens and organophosphate flame retardants (OPFRs). Particularly, all measured chemicals had significantly higher detection rates in cartridges/tanks, drip tips/mouthpieces, and sealing materials in contrast to e-liquids and coil samples. Among all those three types of ENDS components, phthalates generally had the highest concentrations (0.279-3790 ng/unit) in the drip tip/mouthpiece samples, followed by the sealing materials (0.380-508.8 ng/unit) and the empty tank/cartridge samples (up to 761.7 ng/unit). For parabens, highest concentrations were observed in drip tip/mouthpiece samples (1.152-130.1 ng/unit), followed by sealing materials (0.220-30.08 ng/unit) and the tank/cartridge samples (1.794-34.24 ng/unit). For OPFRs, tris(1,3-dichloro-2-propyl) phosphate had the highest concentrations (39.40-774.1 ng/unit) in all component samples. High concentrations (20.25-260.4 ng/unit) were also observed for several OPFRs in sealing materials and drip tip/mouthpiece samples. These findings will contribute to addressing the information gaps pertinent to the presence of ECCs in ENDS and will warrant further studies for understanding the potential negative health effects and to what extent those chemicals may cause potential negative health effects when using the ENDS. The findings will also contribute to developing evidence-based standards for the regulatory control of the types and levels of ECCs in ENDS products.
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Affiliation(s)
- Binnian Wei
- Division
of Cancer Prevention and Population Sciences, Roswell Park Comprehensive Cancer Center, Elm and Carlton Streets, Buffalo, New York 14263, United States
| | - Richard J. O’Connor
- Division
of Cancer Prevention and Population Sciences, Roswell Park Comprehensive Cancer Center, Elm and Carlton Streets, Buffalo, New York 14263, United States
| | - Maciej Lukasz Goniewicz
- Division
of Cancer Prevention and Population Sciences, Roswell Park Comprehensive Cancer Center, Elm and Carlton Streets, Buffalo, New York 14263, United States
| | - Andrew Hyland
- Division
of Cancer Prevention and Population Sciences, Roswell Park Comprehensive Cancer Center, Elm and Carlton Streets, Buffalo, New York 14263, United States
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Tang B, Christia C, Malarvannan G, Liu YE, Luo XJ, Covaci A, Mai BX, Poma G. Legacy and emerging organophosphorus flame retardants and plasticizers in indoor microenvironments from Guangzhou, South China. ENVIRONMENT INTERNATIONAL 2020; 143:105972. [PMID: 32707272 DOI: 10.1016/j.envint.2020.105972] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 07/07/2020] [Accepted: 07/08/2020] [Indexed: 05/22/2023]
Abstract
Indoor dust has been extensively used for assessment of indoor contamination, especially for semi-volatile organic compounds (SVOCs). In the present study, the occurrence of four groups of SVOCs, i.e. organophosphorus flame retardants (PFRs), emerging PFRs (ePFRs), legacy phthalates (LPs), and alternative plasticizers (APs), was investigated in the indoor dust and air collected from floors, table surfaces, windows, and air conditioner (A/C) filters in bedrooms and offices in Guangzhou, South China. In bedrooms, A/C filter dust showed the highest median concentrations of PFRs (4670 ng/g) and ePFRs (586 ng/g), whilst the highest median concentrations of LPs and APs were found in floor (240,880 ng/g) and window dust (157,160 ng/g), respectively. In offices, A/C filter dust showed the highest median concentrations for PFRs (6750 ng/g) and APs (504,520 ng/g), while the highest ePFR median level was found in PC table dust (5810 ng/g) and LPs in floor dust (296,270 ng/g). Median air concentrations of PFRs, ePFRs, LPs, and APs were measured at 4.6, 0.12, 399, and 25 ng/m3 in bedrooms, and at 8.0, 0.05, 332, and 43 ng/m3 in offices, respectively. Tris(1-chloro-iso-propyl) phosphate (TCIPP) was the predominant PFRs/ePFRs in both dust and air. Di(2-ethylhexyl) phthalate (DEHP), di-iso-decyl phthalate (DIDP) and di-iso-nonyl phthalate (DINP) were the main LP/AP compounds in dust, whilst di-iso-butyl phthalate (DIBP) and di-n-butyl phthalate (DNBP) were the most abundant LPs/APs in air. A significant correlation (p < 0.05) was found between dust and air levels for chemicals with log Koa < 14, indicating that equilibrium was achieved for these chemicals but not for those with log Koa > 14. Among the investigated human exposure pathways (i.e. dust ingestion, dermal absorption, and air inhalation), dust ingestion was the predominant one for all chemicals. Human exposures of this magnitude to these chemicals through the investigated pathways was unlikely to present a health risk in the present study.
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Affiliation(s)
- Bin Tang
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Guangzhou, PR China; Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk-Antwerp, Belgium; State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, PR China
| | - Christina Christia
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk-Antwerp, Belgium
| | - Govindan Malarvannan
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk-Antwerp, Belgium
| | - Yin-E Liu
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Guangzhou, PR China
| | - Xiao-Jun Luo
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Guangzhou, PR China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China.
| | - Adrian Covaci
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk-Antwerp, Belgium.
| | - Bi-Xian Mai
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Guangzhou, PR China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China
| | - Giulia Poma
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk-Antwerp, Belgium
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Maddela NR, Venkateswarlu K, Megharaj M. Tris(2-chloroethyl) phosphate, a pervasive flame retardant: critical perspective on its emissions into the environment and human toxicity. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2020; 22:1809-1827. [PMID: 32760963 DOI: 10.1039/d0em00222d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Regulations and the voluntary activities of manufacturers have led to a market shift in the use of flame retardants (FRs). Accordingly, organophosphate ester flame retardants (OPFRs) have emerged as a replacement for polybrominated diphenyl ethers (PBDEs). One of the widely used OPFRs is tris(2-chloroethyl) phosphate (TCEP), the considerable usage of which has reached 1.0 Mt globally. High concentrations of TCEP in indoor dust (∼2.0 × 105 ng g-1), its detection in nearly all foodstuffs (max. concentration of ∼30-300 ng g-1 or ng L-1), human body burden, and toxicological properties as revealed by meta-analysis make TCEP hard to distinguish from traditional FRs, and this situation requires researchers to rethink whether or not TCEP is an appropriate choice as a new FR. However, there are many unresolved issues, which may impede global health agencies in framing stringent regulations and manufacturers considering the meticulous use of TCEP. Therefore, the aim of the present review is to highlight the factors that influence TCEP emissions from its sources, its bioaccessibility, threat of trophic transfer, and toxicogenomics in order to provide better insight into its emergence as an FR. Finally, remediation strategies for dealing with TCEP emissions, and future research directions are addressed.
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Affiliation(s)
- Naga Raju Maddela
- Instituto de Investigación, Universidad Técnica de Manabí, Portoviejo, 130105, Ecuador and Facultad la Ciencias la Salud, Universidad Técnica de Manabí, Portoviejo, 130105, Ecuador
| | - Kadiyala Venkateswarlu
- Formerly Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu 515003, India
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation (GCER), Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Faculty of Science, The University of Newcastle, ATC Building, University Drive, Callaghan, NSW 2308, Australia.
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Organophosphorus Flame Retardants: A Global Review of Indoor Contamination and Human Exposure in Europe and Epidemiological Evidence. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17186713. [PMID: 32942622 PMCID: PMC7558007 DOI: 10.3390/ijerph17186713] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/07/2020] [Accepted: 09/09/2020] [Indexed: 01/13/2023]
Abstract
We aimed to identify high-priority organophosphorus flame retardants for action and research. We thus critically reviewed literature between 2000 and 2019 investigating organophosphorus flame retardants' presence indoors and human exposure in Europe, as well as epidemiological evidence of human effects. The most concentrated compounds indoors were tris(2-butoxyethyl)phosphate (TBOEP), tris(1-chloro-2-propyl)phosphate (TCIPP), tris(2,3-dichloropropyl)phosphate (TDCIPP). TBOEP and TCIPP were the most consistently detected compounds in humans' urine, hair or breast milk as well as tris (butyl) phosphate (TNBP) and tris (phenyl) phosphate (TPHP). Notably, epidemiological evidence concerned reprotoxicity, neurotoxicity, respiratory effects and eczema risk for TDCIPP, eczema increase for TBOEP, and neurodevelopmental outcomes for Isopropylated triarylphosphate isomers (ITPs). Given the ubiquitous presence indoors and the prevalence of exposure, the growing health concern seems justified. TDCIPP and TPHP seem to be of particular concern due to a high prevalence of exposure and epidemiological evidence. TBOEP and TNBP require epidemiological studies regarding outcomes other than respiratory or dermal ones.
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Huang Y, Tan H, Li L, Yang L, Sun F, Li J, Gong X, Chen D. A broad range of organophosphate tri- and di-esters in house dust from Adelaide, South Australia: Concentrations, compositions, and human exposure risks. ENVIRONMENT INTERNATIONAL 2020; 142:105872. [PMID: 32580118 DOI: 10.1016/j.envint.2020.105872] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 05/20/2020] [Accepted: 05/28/2020] [Indexed: 06/11/2023]
Abstract
This study aimed to investigate the occurrences of a suite of thirty-one organophosphate tri-esters (tri-OPEs) and six di-esters (di-OPEs) in house dust collected from Adelaide, South Australia. The results demonstrate ubiquitous presence of most OPEs in Adelaide house dust, with median concentration of 40,200 and 5260 ng/g dry weight for ∑tri-OPEs and ∑di-OPEs, respectively. A number of emerging OPEs with chemical structures resembling that of triphenyl phosphate (TPHP), including bisphenol A bis(diphenyl phosphate) (BPA-BDPP), cresyl diphenyl phosphate (CDP), isodecyl diphenyl phosphate (IDDPP), resorcinol-bis(diphenyl)- phosphate (RDP), as well as a suite of isopropylated or tert-butylated triarylphosphate ester isomers (ITPs or TBPPs), were frequently detected with combined levels surpassing that of TPHP. The investigated di-OPEs, predominated by DPHP, consisted of approximately 13% of the ∑tri-OPEs concentrations. Median concentration ratios of diphenyl phosphate (DPHP) and bis(2-ethylhexyl) phosphate (BEHP) to their respective tri-OPEs [i.e., TPHP and tris(2-ethylhexyl) phosphate (TEHP)] were determined to be 1.8 and 2.0, respectively, indicating possible commercial applications for these two di-OPEs. The estimated human intakes of dust-associated OPEs via dust ingestion and dermal contact were much lower than the reference doses. However, the risks of human exposure to OEPs may be complicated by quickly expanding family of OPEs containing various analogues and isomers as well as additional exposure pathways. Therefore, elucidation of human exposure to OPEs and associated risks requires extensive efforts in analytical, environmental, toxicological, and epidemiological investigations.
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Affiliation(s)
- Yichao Huang
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Hongli Tan
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Liangzhong Li
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, MEE, Guangzhou 510530, China
| | - Liu Yang
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Fengjiang Sun
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Jing Li
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Xue Gong
- School of Agriculture, Food & Wine, the University of Adelaide, Adelaide, SA 5000, Australia
| | - Da Chen
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China.
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Wang X, Zhu Q, Yan X, Wang Y, Liao C, Jiang G. A review of organophosphate flame retardants and plasticizers in the environment: Analysis, occurrence and risk assessment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 731:139071. [PMID: 32438088 DOI: 10.1016/j.scitotenv.2020.139071] [Citation(s) in RCA: 203] [Impact Index Per Article: 50.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 04/23/2020] [Accepted: 04/26/2020] [Indexed: 06/11/2023]
Abstract
Organophosphate esters (OPEs) are used as additives in flame retardants and plasticizers. Due to phase out of several congeners of polybrominated diphenyl ethers (PBDEs), the application of organophosphorus flame retardants (OPFRs) is continuously increasing over the years. As a consequence, large amounts of OPEs enter the environment. Sewage and solid waste (especially e-waste) treatment plants are the important sources of OPEs released to the environment. Other sources include emissions of OPE-containing materials and vehicle fuel into the atmosphere. OPEs are widely detected in air, dust, water, soil, sediment and sludge. To know the pollution situation of OPEs, a variety of methods on their pretreatment and determination have been developed. We discussed and compared the analytical methods of OPEs, including extraction, purification as well as GC- and LC-based determination techniques. Much attention has been paid to OPEs because some of them are recognized highly toxic to biota, and the toxicological investigations of the most concerned OPEs were summarized. Risk assessments showed that the aquatic and benthic environments in some regions are under considerable ecological risks of OPEs. Finally, we pointed out problems in the current studies on OPEs and provided some suggestions for future research.
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Affiliation(s)
- Xin Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qingqing Zhu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xueting Yan
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yawei Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; Institute of Environment and Health, Jianghan University, Wuhan, Hubei 430056, China
| | - Chunyang Liao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; Institute of Environment and Health, Jianghan University, Wuhan, Hubei 430056, China.
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; Institute of Environment and Health, Jianghan University, Wuhan, Hubei 430056, China
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Maceira A, Pecikoza I, Marcé RM, Borrull F. Multi-residue analysis of several high-production-volume chemicals present in the particulate matter from outdoor air. A preliminary human exposure estimation. CHEMOSPHERE 2020; 252:126514. [PMID: 32200176 DOI: 10.1016/j.chemosphere.2020.126514] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 02/20/2020] [Accepted: 03/14/2020] [Indexed: 06/10/2023]
Abstract
A multi-residue method based on gas chromatography-mass spectrometry combined with pressurised liquid extraction was developed to determine seven organophosphate esters (OPEs), six phthalate esters (PAEs), four benzotriazoles (BTRs), five benzothiazoles (BTHs) and four benzenesulfonamides (BSAs) in particulate matter samples from outdoor air. All of these compounds are among the named high-production volume chemicals (HPVCs) and some of them have shown to be harmful to human, therefore they have been subject for legal regulation in order to control their production and usage. Under optimised conditions, high recovery values (>80%) and low detection limits (pg m-3) were obtained for most of the compounds with accuracy values between 83% and 118%. Some samples from two locations surrounded by different industry activities showed the widespread occurrence of all the PAEs, followed by some OPEs. Diethylhexyl phthalate (DEHP) was the most abundant compound with concentrations ranging from 1.9 to 97.7 ng m-3. With the concentrations found, estimated daily intakes through outdoor inhalation were calculated for each contaminant and for different population groups classified by age (infants, children and adults) in two possible exposure scenarios (low and high). Then, hazard quotients and carcinogenic risks were estimated for several compounds, those that had toxicological parameters available. This preliminary result showed no significant risks via ambient inhalation for the exposed population, however more research is needed to confirm the present results.
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Affiliation(s)
- Alba Maceira
- Department of Analytical and Organic Chemistry, Faculty of Chemistry, Campus Sescelades, Universitat Rovira i Virgili, Marcel∙lí Domingo s/n, Tarragona, 43007, Spain
| | - Irma Pecikoza
- Department of Analytical and Organic Chemistry, Faculty of Chemistry, Campus Sescelades, Universitat Rovira i Virgili, Marcel∙lí Domingo s/n, Tarragona, 43007, Spain
| | - Rosa Maria Marcé
- Department of Analytical and Organic Chemistry, Faculty of Chemistry, Campus Sescelades, Universitat Rovira i Virgili, Marcel∙lí Domingo s/n, Tarragona, 43007, Spain.
| | - Francesc Borrull
- Department of Analytical and Organic Chemistry, Faculty of Chemistry, Campus Sescelades, Universitat Rovira i Virgili, Marcel∙lí Domingo s/n, Tarragona, 43007, Spain
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Abstract
PURPOSE OF REVIEW The recent increase in childhood food allergy prevalence strongly suggests that environmental exposures are contributing to food allergy development. This review summarizes current knowledge about the role of the external exposome in food allergy. RECENT FINDINGS There is growing evidence that environmental exposure to food antigens in house dust through non-oral routes contributes to food sensitization and allergy. Co-exposure to environmental adjuvants in house dust, such as microbial products and fungal allergens, may also facilitate allergic sensitization. While a high-microbe environment is associated with decreased atopy, studies are mixed on whether endotoxin exposure protects against food sensitization. Several chemicals and air pollutants have been associated with food sensitization, but their role in food allergy remains understudied. Children are exposed to numerous environmental agents that can influence food allergy risk. Further studies are needed to identify the key early-life exposures that promote or inhibit food allergy development.
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Affiliation(s)
- Timothy P Moran
- Department of Pediatrics, University of North Carolina School of Medicine, Chapel Hill, NC, USA.
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70
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Yanagisawa R, Koike E, Win-Shwe TT, Kawaguchi M, Takano H. The impact of oral exposure to low-dose tris(2-butoxyethyl) phosphate in allergic asthmatic mice. J Appl Toxicol 2020; 40:1498-1510. [PMID: 32497324 DOI: 10.1002/jat.4001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/29/2020] [Accepted: 04/29/2020] [Indexed: 12/24/2022]
Abstract
Tris(2-butoxyethyl) phosphate (TBEP) is a major organophosphorus flame retardant and has been widely increasing as a substitute for brominated flame retardants. TBEP may have adverse effects on human health; however, its impact on immune and allergic responses remains largely uncharacterized. In this study, the effects of low-dose TBEP comparable with the level of actual human exposure to that of human tolerable daily intake on allergic asthmatic mice were explored. Five-week-old C3H/HeJSlc male mice consumed a diet containing approximately 0.02, 0.2 or 2 μg/kg/day TBEP and were intratracheally administrated ovalbumin (OVA) (1 μg/mouse every 2 weeks from 5 to 11 weeks of age). Exposure to 2 μg/kg/day TBEP with OVA tended to enhance allergic pulmonary inflammation and significantly elevated mRNA levels of interleukin-5, eotaxin-1 and estrogen receptor alpha (ERα) compared with OVA alone. In mediastinal lymph nodes (MLNs), TBEP (0.2 or 2 μg/kg/day) with OVA significantly increased in total cell number and promoted conventional dendritic cell activation than OVA alone; MLN cell proliferation by OVA restimulation was also enhanced in these groups. In the bone marrow (BM), TBEP (0.02 or 0.2 μg/kg/day) with OVA resulted in a net decrease in total cell number and fraction of CCR2+ Gr-1+ cells; the fraction of Gr-1+ cells increased. In conclusion, oral exposure to low-dose TBEP levels equivalent to tolerable daily intake may exacerbate allergic pulmonary inflammation by promoting a skewed T-helper 2 cell response, upregulation of ERα and dysregulation of both MLN and BM microenvironments.
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Affiliation(s)
- Rie Yanagisawa
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - Eiko Koike
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - Tin-Tin Win-Shwe
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Japan
| | | | - Hirohisa Takano
- Graduate School of Global Environmental Studies, Kyoto, Japan
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71
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Organophosphate Esters: Are These Flame Retardants and Plasticizers Affecting Children's Health? Curr Environ Health Rep 2020; 6:201-213. [PMID: 31755035 DOI: 10.1007/s40572-019-00258-0] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE OF REVIEW Organophosphate esters (OPEs) are applied to a variety of consumer products, primarily as flame retardants and plasticizers. OPEs can leach out of products over time and are consequently prevalent in the environment and frequently detected in human biomonitoring studies. Exposure during pregnancy is of particular concern as OPEs have recently been detected in placental tissues, suggesting they may be transferred to the developing infant. Also, studies have now shown that children typically experience higher exposure to several OPEs compared with adults, indicating they may be disproportionately impacted by these compounds. This review summarizes the current literature on reproductive and child health outcomes of OPE exposures and highlights areas for future research. RECENT FINDINGS Experimental animal studies demonstrate potential for OPEs to adversely impact health, and a limited number of epidemiologic studies conducted in adult cohorts suggest that OPEs may interfere with the endocrine system. Neurodevelopment is perhaps the most well studied of children's health endpoints, and several studies indicate that prenatal and early life OPE exposures impact both cognitive and behavioral development. Associations have also been reported with reproductive outcomes (e.g., fertilization and pregnancy loss) and with the timing of parturition and preterm birth. Cross-sectional studies also demonstrate associations between OPEs and respiratory health outcomes, allergic disease, and measures of adiposity. An expanding body of research demonstrates that OPEs are associated with adverse reproductive health and birth outcomes, asthma and allergic disease, early growth and adiposity, and neurodevelopment. Still, additional research is urgently needed to elucidate the full impact of OPEs on children's health.
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72
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Bastiaensen M, Ait Bamai Y, Araki A, Goudarzi H, Konno S, Ito S, Miyashita C, Yao Y, Kishi R, Covaci A. Temporal trends and determinants of PFR exposure in the Hokkaido Study. Int J Hyg Environ Health 2020; 228:113523. [PMID: 32305863 DOI: 10.1016/j.ijheh.2020.113523] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/28/2020] [Accepted: 04/01/2020] [Indexed: 01/15/2023]
Abstract
The phase-out of polybrominated diphenyl ethers (PBDE) flame retardants has led to the rapid increase of alternatives such as phosphate flame retardants and plasticizers (PFRs) in many consumer products. Exposure to these additive chemicals is widespread and potentially harmful to humans and the environment. In the present study, we assessed the exposure to PFRs through the analysis of metabolites in urine collected from 7-year old children from Hokkaido, Japan between 2012 and 2017. This allowed us to investigate temporal and seasonal trends for PFR metabolite concentrations and to study determinants of exposure. Thirteen metabolites of seven PFRs were measured in morning spot urine samples (n = 400). Multiple regression models were used to quantify the yearly increase in metabolite concentrations per sampling year. Information on the demographics, indoor environment and dietary habits of the participants were derived from self-administered questionnaires. PFR metabolite concentrations were comparable to our previous study of school children (7-12 years old). Eight PFR metabolites were detected in >50% of the samples. During the study time period, concentrations of three metabolites increased significantly: bis(1,3-dichloro-2-propyl) phosphate (BDCIPP; 13.3% per year), 1-hydroxy-2-propyl bis(1-chloro-2-propyl) phosphate (BCIPHIPP; 12.9% per year), and 2-ethylhexyl phenyl phosphate (EHPHP; 6.7% per year). We also found seasonality as a determinant for several PFR metabolites, with 2-fold higher levels in summer for BCIPHIPP and BDCIPP. Concentrations were also significantly impacted by ventilation habits. More frequent window opening or use of mechanical ventilation was consistently associated with higher levels of PFR metabolites in children's urine. This is the first study to show that human exposure to PFRs has increased in recent years in Japan, which indicates that further research into this class of chemicals is warranted.
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Affiliation(s)
- Michiel Bastiaensen
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium.
| | - Yu Ait Bamai
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo, 060-0812, Japan
| | - Atsuko Araki
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo, 060-0812, Japan
| | - Houman Goudarzi
- Hokkaido University Center for Medical Education and International Relations, Faculty of Medicine and Graduate School of Medicine, Sapporo, Japan Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan; Hokkaido University Faculty of Medicine and Graduate School of Medicine, Department of Respiratory Medicine, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-0815, Japan
| | - Satoshi Konno
- Hokkaido University Faculty of Medicine and Graduate School of Medicine, Department of Respiratory Medicine, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-0815, Japan
| | - Sachiko Ito
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo, 060-0812, Japan
| | - Chihiro Miyashita
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo, 060-0812, Japan
| | - Yiming Yao
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium; MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Reiko Kishi
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo, 060-0812, Japan
| | - Adrian Covaci
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium.
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73
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Araki A, Ait Bamai Y, Bastiaensen M, Van den Eede N, Kawai T, Tsuboi T, Miyashita C, Itoh S, Goudarzi H, Konno S, Covaci A, Kishi R. Combined exposure to phthalate esters and phosphate flame retardants and plasticizers and their associations with wheeze and allergy symptoms among school children. ENVIRONMENTAL RESEARCH 2020; 183:109212. [PMID: 32058144 DOI: 10.1016/j.envres.2020.109212] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 01/12/2020] [Accepted: 02/01/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND Phthalate esters and phosphate flame retardants and plasticizers (PFRs) are both used as plasticizers and are commonly detected in indoor environments. Although both phthalates and PFRs are known to be associated with children's wheeze and allergic symptoms, there have been no previous studies examining the effects of mixtures of these exposures. OBJECTIVES To investigate the association between exposure to mixtures of phthalate esters and PFRs, and wheeze and allergic symptoms among school-aged children. METHODS A total of 128 elementary school-aged children were enrolled. Metabolites of 3 phthalate esters and 7 PFRs were measured in urine samples. Parent-reported symptoms of wheeze, rhinoconjunctivitis, and eczema were evaluated using the International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire. In the primary model, we created a phthalate ester and PFR mixture exposure index, and estimated odds ratios (ORs) using weighted quantile sum (WQS) regression and quantile g (qg)-computation. The two highest chemicals according to qg-computation weight %s were combined to create a combination high × high exposure estimate, with ORs calculated using the "low × low" exposure group as the reference category. Concentrations of each metabolite were corrected by multiplying this value by the sex- and body size-Standardised creatinine concentration and dividing by the observed creatinine value. All models were adjusted for sex, grade, dampness index and annual house income. RESULTS The odds ratio of rhinoconjunctivitis for the association between exposure to chemical mixtures according to the WQS index positive models was; OR = 2.60 (95% confidence interval [CI]: 1.38-5.14). However, wheeze and eczema of the WQS index positive model, none of the WQS index negative models or qg-computation result yielded statistically significant results. Combined exposure to the two highest WQS weight %s of "high-high" ΣTCIPP and ΣTPHP was associated with an increased prevalence of rhino-conjunctivitis, OR = 5.78 (1.81-18.43) to the "low × low" group. CONCLUSIONS Significant associations of mixed exposures to phthalates and PFRs and increased prevalence of rhinoconjunctivitis was found among elementary school-aged children in the WQS positive model. Mixed exposures were not associated with any of allergic symptoms in the WQS negative model or qg-computation approach. However, the combined effects of exposure to two PFRs suggested an additive and/or multiplicative interaction, potentially increasing the prevalence of rhinoconjunctivitis. A further study with a larger sample size is needed to confirm these results.
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Affiliation(s)
- Atsuko Araki
- Hokkaido University, Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo, 060-0812, Japan
| | - Yu Ait Bamai
- Hokkaido University, Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo, 060-0812, Japan
| | - Michiel Bastiaensen
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| | - Nele Van den Eede
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| | - Toshio Kawai
- Osaka Occupational Health Service Center, Japan Industrial Safety and Health Association, 2-3-8, Tosabori, Nishi-ku, Osaka, 550-0001, Japan
| | - Tazuru Tsuboi
- Osaka Occupational Health Service Center, Japan Industrial Safety and Health Association, 2-3-8, Tosabori, Nishi-ku, Osaka, 550-0001, Japan
| | - Chihiro Miyashita
- Hokkaido University, Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo, 060-0812, Japan
| | - Sachiko Itoh
- Hokkaido University, Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo, 060-0812, Japan
| | - Houman Goudarzi
- Center for Medical Education and International Relations, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan; Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-0815, Japan
| | - Satoshi Konno
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-0815, Japan
| | - Adrian Covaci
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| | - Reiko Kishi
- Hokkaido University, Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo, 060-0812, Japan.
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74
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Reddam A, Tait G, Herkert N, Hammel SC, Stapleton HM, Volz DC. Longer commutes are associated with increased human exposure to tris(1,3-dichloro-2-propyl) phosphate. ENVIRONMENT INTERNATIONAL 2020; 136:105499. [PMID: 31999975 PMCID: PMC7061053 DOI: 10.1016/j.envint.2020.105499] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/15/2020] [Accepted: 01/15/2020] [Indexed: 05/21/2023]
Abstract
Organophosphate esters (OPEs) are a class of semi-volatile organic compounds (SVOCs) used as flame retardants, plasticizers, and anti-foaming agents. Due to stringent flammability standards in vehicles and the ability of OPEs to migrate out of end-use products, elevated concentrations of OPEs have been found in car dust samples around the world. As many residents of Southern California spend a significant amount of time in their vehicles, there is potential for increased exposure to OPEs associated with longer commute times. As approximately 70% of the University of California, Riverside's undergraduate population commutes, the objective of this study was to use silicone wristbands to monitor personal exposure to OPEs and determine if exposure was associated with commute time in a subset of these students. Participants were asked to wear wristbands for five continuous days and complete daily surveys about the amount of time spent commuting. Data were then used to calculate a participant-specific total commute score. Components of Firemaster 550 (triphenyl phosphate, or TPHP, and isopropylated triaryl phosphate isomers) and Firemaster 600 (TPHP and tert-butylated triaryl phosphate isomers) - both widely used commercial flame retardant formulations - were strongly correlated with other OPEs detected within participant wristbands. Moreover, the concentration of tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) was significantly correlated with the concentration of several Firemaster 500 components and tris(2-chloroisopropyl) phosphate (TCIPP). Finally, out of all OPEs measured, TDCIPP was significantly and positively correlated with total commute score, indicating that longer commutes are associated with increased human exposure to TDCIPP. Overall, our findings raise concerns about the potential for chronic TDCIPP exposure within vehicles and other forms of transportation, particularly within densely populated and traffic-congested areas such as Southern California.
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Affiliation(s)
- Aalekhya Reddam
- Environmental Toxicology Graduate Program, University of California, Riverside, CA, USA; Department of Environmental Sciences, University of California, Riverside, CA, USA
| | - George Tait
- Nicholas School of the Environment, Duke University, Durham, NC, USA
| | - Nicholas Herkert
- Nicholas School of the Environment, Duke University, Durham, NC, USA
| | | | | | - David C Volz
- Department of Environmental Sciences, University of California, Riverside, CA, USA.
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75
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Urban-level environmental factors related to pediatric asthma. Porto Biomed J 2020; 5:e57. [PMID: 33299939 PMCID: PMC7722407 DOI: 10.1097/j.pbj.0000000000000057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 01/06/2020] [Indexed: 01/22/2023] Open
Abstract
During the 20th century, urbanization has increasing and represented a major demographic and environmental change in developed countries. This ever-changing urban environment has an impact on disease patterns and prevalence, namely on noncommunicable diseases, such as asthma and allergy, and poses many challenges to understand the relationship between the changing urban environment and the children health. The complex interaction between human beings and urbanization is dependent not only on individual determinants such as sex, age, social or economic resources, and lifestyles and behaviors, but also on environment, including air pollution, indoors and outdoors, land use, biodiversity, and handiness of green areas. Therefore, the assessment and identification of the impact of urban environment on children's health have become a priority and many recent studies have been conducted with the goal of better understanding the impacts related to urbanization, characterizing indoor air exposure, identifying types of neighborhoods, or characteristics of neighborhoods that promote health benefits. Thus, this review focuses on the role of urban environmental factors on pediatric asthma.
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76
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Peng B, Yu ZM, Wu CC, Liu LY, Zeng L, Zeng EY. Polybrominated diphenyl ethers and organophosphate esters flame retardants in play mats from China and the exposure risks for children. ENVIRONMENT INTERNATIONAL 2020; 135:105348. [PMID: 31884131 DOI: 10.1016/j.envint.2019.105348] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 11/13/2019] [Accepted: 11/18/2019] [Indexed: 06/10/2023]
Abstract
A total of 41 play mats made from different raw materials, such as polyethylene (PE), ethylene-vinyl acetate copolymer (EVA), chemical crosslinked polyethylene (XPE), and polyvinyl chloride (PVC), were obtained from Chinese markets and analyzed for flame retardants. Polybrominated diphenyl ethers (PBDEs) and their replacements, organophosphate esters (OPEs), were measured and the associated exposure risks for children were evaluated. The levels (range; median) of OPEs (6.6-7400; 200 ng g-1) were generally 1-2 orders of magnitude higher than those of PBDEs (0.13-72; 13 ng g-1), consistent with the production and usage trends of flame retardants. The concentrations of both PBDEs and OPEs were the lowest in XPE mats (0.13-5.6; 3.3 ng g-1 for PBDEs and 6.6-320; 47 ng g-1 for OPEs) compared to the other three types. Concentration comparison and compositional analysis suggested that PBDEs and OPEs in play mats were most probably from leaching of raw materials, during production, storage, and/or transport. Children's exposure to PBDEs and OPEs from play mats was estimated for three pathways, i.e., dermal contact, inhalation, and hand-to-mouth ingestion. The combined exposure was 5-6 orders of magnitude lower than the established reference dose values, suggesting no obvious health concern regarding the occurrence of PBDEs and OPEs in play mats. Nevertheless, selection of less contaminated, i.e., XPE mats among those under investigation, by consumers is strongly recommended to minimize any potential exposure risk.
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Affiliation(s)
- Bo Peng
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Zi-Min Yu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Chen-Chou Wu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Liang-Ying Liu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China.
| | - Lixi Zeng
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Eddy Y Zeng
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
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77
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Watanabe M, Noguchi M, Hashimoto T, Yoshida S. [Adsorption of Airbone Organophosphorus Flame Retardants on Polished Rice Stored in a House]. Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi) 2020; 60:159-167. [PMID: 31969535 DOI: 10.3358/shokueishi.60.159] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In order to clarify the actual situation of indoor pollution to polished rice with organophosphorus flame retardants (PFRs) which are ubiquitous in the indoor environment, the pollution of PFRs to polished rice stored in a house for a week was investigated. The survey covered 64 ordinary families in the Osaka region. We analyzed six typical PFRs in 37 rice samples in 2015, and ten typical PFRs in 27 rice samples in 2016. Polished rice was homogenized with acetone-hexane and defatted by hexane-acetonitrile partition. Quantitative analysis for PFRs was performed by GC-FPD. The detection frequency of PFRs in the rice samples was 35/37 in 2015 and 27/27 in 2016. The highest values were 160 ng/g for TCEP, 500 ng/g for TCIPP and 430 ng/g for TBEP. The concentration ratio of each detected PFR in the polished rice samples was different in each house. In the analysis of 16 polished rice samples which were stored in the home, PFRs were detected in ten samples regardless of the storage methods. PFRs were detected from 12 out of 16 commercial brown rice samples. This result suggested that they were polluted during distribution and storage process of them.
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Affiliation(s)
- Misaki Watanabe
- Food Science and Nutrition Major, Graduate School of Human Environmental Sciences, Mukogawa Women's University
| | - Mikako Noguchi
- Food Science and Nutrition Major, Graduate School of Human Environmental Sciences, Mukogawa Women's University
| | - Tamiko Hashimoto
- Department of Food Science and Nutrition, Faculty of Human Environmental Sciences, Mukogawa Women's University
| | - Seisaku Yoshida
- Department of Food Science and Nutrition, Faculty of Human Environmental Sciences, Mukogawa Women's University
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78
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Ait Bamai Y, Bastiaensen M, Araki A, Goudarzi H, Konno S, Ito S, Miyashita C, Yao Y, Covaci A, Kishi R. Multiple exposures to organophosphate flame retardants alter urinary oxidative stress biomarkers among children: The Hokkaido Study. ENVIRONMENT INTERNATIONAL 2019; 131:105003. [PMID: 31310930 DOI: 10.1016/j.envint.2019.105003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 06/22/2019] [Accepted: 07/09/2019] [Indexed: 05/27/2023]
Abstract
Organophosphate flame retardants (PFRs) are used as additives in plastics and other applications such as curtains and carpets as a replacement for brominated flame retardants. As such, exposure to PFR mixtures is widespread, with children being more vulnerable than adults to associated health risks such as allergies and inflammation. Oxidative stress is thought to be able to modulate the development of childhood airway inflammation and atopic dermatitis. To evaluate these associations, the present study investigated the relationship between urinary PFR metabolites, their mixtures and urinary oxidative stress biomarkers in children as part of the Hokkaido Study on Environment and Children's Health. The levels of the oxidative stress biomarkers, such as 8-hydroxy-2'-deoxyguanosine (8-OHdG), hexanoyl-lysine (HEL), and 4-hydroxynonenal (HNE), and of 14 PFR metabolites were measured in morning spot urine samples of 7-year-old children (n = 400). Associations between PFR metabolites or PFR metabolite mixtures and oxidative stress biomarkers were examined by multiple regression analysis and weighted quantile sum regression analysis, respectively. We found that the non-chlorinated PFR metabolites, 2-ethylhexyl phenyl phosphate (EHPHP), bis(2-butoxyethyl) phosphate (BBOEP), and diphenyl phosphate (DPHP) were associated with increased levels of oxidative stress biomarkers. Furthermore, the PFR metabolite mixture was associated with increased levels of HEL and HNE, but not 8-OHdG. The combination of elevated top 2 PFR metabolites was not associated with higher urinary oxidative stress marker levels. This is the first study to report associations between urinary PFR metabolites and oxidative stress biomarkers among children.
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Affiliation(s)
- Yu Ait Bamai
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Michiel Bastiaensen
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Atsuko Araki
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan.
| | - Houman Goudarzi
- Hokkaido University Center for Medical Education and International Relations, Faculty of Medicine, Graduate School of Medicine, Kita 15, Nishi 7, Kita-ku, Sapporo 060-8638, Japan; Hokkaido University Faculty of Medicine, Graduate School of Medicine, Department of Respiratory Medicine, Kita 15, Nishi 7, Kita-ku, Sapporo 060-0815, Japan
| | - Satoshi Konno
- Hokkaido University Faculty of Medicine, Graduate School of Medicine, Department of Respiratory Medicine, Kita 15, Nishi 7, Kita-ku, Sapporo 060-0815, Japan
| | - Sachiko Ito
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Chihiro Miyashita
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Yiming Yao
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium; MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Adrian Covaci
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Reiko Kishi
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan.
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79
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Wei B, Goniewicz M, O’Connor RJ. Concurrent Quantification of Emerging Chemicals of Health Concern in e-Cigarette Liquids by High-Performance Liquid Chromatography-Tandem Mass Spectrometry. ACS OMEGA 2019; 4:15364-15372. [PMID: 31572835 PMCID: PMC6761617 DOI: 10.1021/acsomega.9b01255] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 07/24/2019] [Indexed: 05/30/2023]
Abstract
Emerging chemicals of concern (ECCs), including phthalate plasticizers, flame retardants, and phenolic compounds, are likely present in electronic nicotine delivery system (ENDS) replacement solutions (e-liquids) which are often packaged, stored in, and/or can contact with, plastic, glass, and metal materials. Developing and validating an efficient analytical method for concurrent quantification of ECCs in e-liquids are thus needed to inform evidence-based safety evaluation of ENDS products. In this study, we developed and validated a "dilute-and-shoot" method using high-performance liquid chromatography coupled with tandem mass spectrometry to simultaneously measure organophosphate flame retardants (OPFRs), phthalate plasticizers, and tetrabromobisphenol A (TBBPA) in e-liquids. We analyzed samples in positive electrospray ionization mode (ESI+) for OPFRs and phthalates and negative ESI- for TBBPA. The method has a total runtime of 10 min. The optimized procedure was able to deliver broad dynamic linearity ranges with coefficients of determination (R 2) above 0.995, limits of detection ranging from 0.020 to 10 ng/mL, average accuracy within ±15%, and imprecision ≤ 15.0% for all analytes. To our knowledge, this is the first multianalysis method for measuring ECCs in e-liquid samples, and the validation results show that it is sensitive, accurate, precise, and efficient.
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Affiliation(s)
- Binnian Wei
- E-mail: , . Phone: 716-845-1751. Fax: 716-845-3562
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80
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Abafe OA, Martincigh BS. Concentrations, sources and human exposure implications of organophosphate esters in indoor dust from South Africa. CHEMOSPHERE 2019; 230:239-247. [PMID: 31103870 DOI: 10.1016/j.chemosphere.2019.04.175] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/15/2019] [Accepted: 04/21/2019] [Indexed: 06/09/2023]
Abstract
The concentrations of four organophosphate esters (OPEs) were measured in 50 dust samples from homes (n = 10), offices (n = 9), university computer laboratories (n = 12) and cars (n = 19) in Durban, South Africa. The median concentrations Σn=4 OPEs were 22940, 26930, 19565 and 49010 ng g⁻1 in homes, offices, university computer laboratories and cars respectively. OPEs were detected in all samples with the exception of one car and one computer laboratory sample in which TDCIPP was not detected. Significant association of indoor characteristics with OPE concentrations was observed. OPEs positively correlated (r = 0.22, p value = 0.4862) with electronics and correlated (r = 0.522, p value = 0.0675) with foams and furniture in homes. By employing the median concentrations and an average dust intake rate, the exposure doses (ng d-1) were found to be 169 (TCEP), 74 (TCIPP), 162 (TDCIPP) and 55 (TPHP) for adults; 159 (TCEP), 70 (TCIPP), 108 (TDCIPP) and 57 (TPHP) for teenagers; 317 (TCEP), 152 (TCIPP), 334 (TDCIPP) and 94 (TPHP) for toddlers. The predominance and exposure magnitude of OPEs in the South African environment require further investigations to determine cumulative human health effects arising from mixtures of these compounds through multiple exposure routes.
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Affiliation(s)
- Ovokeroye A Abafe
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban, 4000, South Africa
| | - Bice S Martincigh
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban, 4000, South Africa.
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81
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Castro V, Rodil R, Quintana JB, Cela R, Sánchez-Fernández L, González-Mariño I. Determination of human metabolites of chlorinated phosphorous flame retardants in wastewater by N-tert-butyldimethylsilyl-N-methyltrifluoroacetamide-derivatization and gas chromatography-high resolution mass spectrometry. J Chromatogr A 2019; 1602:450-457. [DOI: 10.1016/j.chroma.2019.06.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/04/2019] [Accepted: 06/07/2019] [Indexed: 10/26/2022]
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82
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Li HL, Liu LY, Zhang ZF, Ma WL, Sverko E, Zhang Z, Song WW, Sun Y, Li YF. Semi-volatile organic compounds in infant homes: Levels, influence factors, partitioning, and implications for human exposure. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 251:609-618. [PMID: 31108294 DOI: 10.1016/j.envpol.2019.05.048] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 05/09/2019] [Accepted: 05/10/2019] [Indexed: 06/09/2023]
Abstract
While infants are developing, they are easily affected by toxic chemicals existing in their environments, such as semi-volatile organic compounds (SVOCs): phthalates, polycyclic aromatic hydrocarbons (PAHs), polybrominated diphenyl ethers (PBDEs), and organophosphate esters (OPEs). However, the specific living environment of infants, including increased plastic products and foam floor mats, may increase the presence of these chemicals. In this study, 68 air, dust, and window film samples were collected from homes, with 3- to 6-month-old infant occupants, to analyze phthalates, PAHs, PBDEs, and OPEs. High detection rates and concentrations suggest that these SVOCs are widespread in infant environments and are associated with cooking methods, smoking habits, the period of time after decoration, and room floors. The partitioning behavior of SVOCs indicates that the logarithms of the dust/gas-phase air partition coefficient (logKD) and the window film/gas-phase air partition coefficient (logKF) in homes are not at an equilibrium state when the logarithm of the octanol/air partition coefficient (logKOA) is less than 8 or greater than 11. Considering the 3 exposure routes, ingestion and dermal absorption have become the main routes of infant exposure to phthalates and OPEs, and ingestion and inhalation have become the dominant routes of exposure to PAHs and PBDEs. The total carcinogenic risk of SVOCs, which have carcinogenic toxicities, via ingestion and dermal absorption for infants in homes exceeds the acceptable value, suggesting that the current levels of these SVOCs in homes might pose a risk to infant health.
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Affiliation(s)
- Hai-Ling Li
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; University Corporation for Polar Research, Beijing, 100875, PR China
| | - Li-Yan Liu
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; University Corporation for Polar Research, Beijing, 100875, PR China.
| | - Zi-Feng Zhang
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; University Corporation for Polar Research, Beijing, 100875, PR China
| | - Wan-Li Ma
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; University Corporation for Polar Research, Beijing, 100875, PR China
| | - Ed Sverko
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; University Corporation for Polar Research, Beijing, 100875, PR China; IJRC-PTS-NA & IJRC-AEE-NA, Toronto, Ontario, M2N 6X9, Canada
| | - Zhi Zhang
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), College of Agricultural Resource and Environment, Heilongjiang University, Harbin 150080, PR China
| | - Wei-Wei Song
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; University Corporation for Polar Research, Beijing, 100875, PR China
| | - Yu Sun
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; University Corporation for Polar Research, Beijing, 100875, PR China
| | - Yi-Fan Li
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; University Corporation for Polar Research, Beijing, 100875, PR China; IJRC-PTS-NA & IJRC-AEE-NA, Toronto, Ontario, M2N 6X9, Canada
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83
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Sakhi AK, Cequier E, Becher R, Bølling AK, Borgen AR, Schlabach M, Schmidbauer N, Becher G, Schwarze P, Thomsen C. Concentrations of selected chemicals in indoor air from Norwegian homes and schools. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 674:1-8. [PMID: 31003082 DOI: 10.1016/j.scitotenv.2019.04.086] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 03/15/2019] [Accepted: 04/06/2019] [Indexed: 06/09/2023]
Abstract
Both building materials and consumer products have been identified as possible sources for potentially hazardous substances like phthalates, polychlorinated biphenyls (PCBs), organophosphorous flame retardants (OPFRs), polybrominated diphenyl ethers (PBDEs) and short chain chlorinated paraffins (SCCPs) in indoor air. Thus, indoor air has been suggested to contribute significantly to human exposure to these chemicals. There is lack of data on the occurrence of several of the aforementioned chemicals in indoor air. Therefore, indoor air (gas and particulate phase) was collected from 48 households and 6 classrooms in two counties in Norway. In both the households and schools, median levels of low molecular weight phthalates (785 ng/m3), OPFRs (55 ng/m3) and SCCPs (128 ng/m3) were up to 1000 times higher than the levels of PCBs (829 pg/m3) and PBDEs (167 pg/m3). Median concentrations of dimethyl phthalate (DMP), diethyl phthalate (DEP), di-isobutyl phthalate (DiBP) and SCCPs were 3-6 times higher in households compared to schools. The levels of OPFRs, PCBs and PBDEs were similar in households and schools. In univariate analysis, the indoor concentrations of different environmental chemicals were significantly affected by location of households (OPFRs), airing of living room (some PCBs and PBDEs), presence of upholstered chair/couch (OPFRs), pet animal hold (some PBDEs) and presence of electrical heaters (selected PCBs and PBDEs). Significant correlations were also detected for the total size of households with OPFRs, frequency of vacuuming the living room with selected PCBs and PBDEs, frequency of washing the living room with selected PCBs and the total number of TVs in the households with selected phthalates and SCCPs. Finally, intake estimates indicated that indoor air contributed more or equally to low molecular weight phthalates and SCCPs exposure compared to food consumption, whereas the contribution from indoor air was smaller than the dietary intake for the other groups of chemicals.
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Affiliation(s)
- Amrit Kaur Sakhi
- Division of Infection Control and Environmental Health, Norwegian Institute of Public Health, PO Box 222, Skøyen, N-0213 Oslo, Norway.
| | - Enrique Cequier
- Division of Infection Control and Environmental Health, Norwegian Institute of Public Health, PO Box 222, Skøyen, N-0213 Oslo, Norway
| | - Rune Becher
- Division of Infection Control and Environmental Health, Norwegian Institute of Public Health, PO Box 222, Skøyen, N-0213 Oslo, Norway
| | - Anette Kocbach Bølling
- Division of Infection Control and Environmental Health, Norwegian Institute of Public Health, PO Box 222, Skøyen, N-0213 Oslo, Norway
| | - Anders R Borgen
- Norwegian Institute for Air Research, PO Box 100, 2027, Kjeller, Norway
| | - Martin Schlabach
- Norwegian Institute for Air Research, PO Box 100, 2027, Kjeller, Norway
| | | | - Georg Becher
- Division of Infection Control and Environmental Health, Norwegian Institute of Public Health, PO Box 222, Skøyen, N-0213 Oslo, Norway; Department of Chemistry, University of Oslo, PO Box 1033, Blindern, 0315 Oslo, Norway
| | - Per Schwarze
- Division of Infection Control and Environmental Health, Norwegian Institute of Public Health, PO Box 222, Skøyen, N-0213 Oslo, Norway
| | - Cathrine Thomsen
- Division of Infection Control and Environmental Health, Norwegian Institute of Public Health, PO Box 222, Skøyen, N-0213 Oslo, Norway
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84
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Wang Y, Yang Y, Zhang Y, Tan F, Li Q, Zhao H, Xie Q, Chen J. Polyurethane heat preservation materials: The significant sources of organophosphorus flame retardants. CHEMOSPHERE 2019; 227:409-415. [PMID: 31003125 DOI: 10.1016/j.chemosphere.2019.04.085] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 04/09/2019] [Accepted: 04/11/2019] [Indexed: 06/09/2023]
Abstract
The concentrations and compositions of organophosphorus flame retardants (OPFRs) in various heat preservation materials from different brands and types in China were investigated, as well as their OPFR burdens and emission amounts. The average concentrations of ΣOPFRs were 41.4 ± 10.2, (7.1 ± 4.0) × 104, and 56.3 ± 19.3 μg/g in phenolic foams (PF), polyurethane foams (PUR), and extruded polystyrene boards (XPS), respectively. OPFRs in the PUR materials were ∼3 orders of magnitude higher than those in the other two materials, suggesting that organophosphate esters were added as flame retardants (FRs) in the PUR materials. Obvious variations in the concentrations and compositions of OPFRs were discovered in those heat preservation materials due to their material types, brands, and fire-ratings, as well as contaminations. TCIPP was the most dominant OPFR with a range from 22.3 (in PF) to 6.73 × 104 (in PUR) μg/g, which emphasized that TCIPP was the most commonly used flame retardant additives in China. Based on the OPFR concentrations, OPFR emission rates, and application amounts of heat preservation materials, we calculated the total burdens of OPFRs in those materials and their emission amounts in China. The potential total burden of OPFRs in the completed new buildings of China in 2017 was estimated to be ∼(2.37 ± 1.11) × 104 t, while the total emission of OPFRs from those new materials was ∼3.19 ± 1.65 t/y. As significant sources of OPFRs, the heat preservation materials used in exterior or interior walls may pose potential health risks to humans.
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Affiliation(s)
- Yan Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
| | - Ya Yang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Yuwei Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Feng Tan
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Qilu Li
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan, 453007, PR China
| | - Hongxia Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Qing Xie
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Jingwen Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
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85
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Demirtepe H, Melymuk L, Diamond ML, Bajard L, Vojta Š, Prokeš R, Sáňka O, Klánová J, Palkovičová Murínová Ľ, Richterová D, Rašplová V, Trnovec T. Linking past uses of legacy SVOCs with today's indoor levels and human exposure. ENVIRONMENT INTERNATIONAL 2019; 127:653-663. [PMID: 30991221 DOI: 10.1016/j.envint.2019.04.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 03/29/2019] [Accepted: 04/01/2019] [Indexed: 05/22/2023]
Abstract
Semivolatile organic compounds (SVOCs) emitted from consumer products, building materials, and indoor and outdoor activities can be highly persistent in indoor environments. Human exposure to and environmental contamination with polychlorinated biphenyls (PCBs) was previously reported in a region near a former PCB production facility in Slovakia. However, we found that the indoor residential PCB levels did not correlate with the distance from the facility. Rather, indoor levels in this region and those reported in the literature were related to the historic PCB use on a national scale and the inferred presence of primary sources of PCBs in the homes. Other SVOCs had levels linked with either the activities in the home, e.g., polycyclic aromatic hydrocarbons (PAHs) with wood heating; or outdoor activities, e.g., organochlorine pesticides (OCPs) with agricultural land use and building age. We propose a classification framework to prioritize SVOCs for monitoring in indoor environments and to evaluate risks from indoor SVOC exposures. Application of this framework to 88 measured SVOCs identified several PCB congeners (CB-11, -28, -52), hexachlorobenzene (HCB), benzo(a)pyrene, and γ-HCH as priority compounds based on high exposure and toxicity assessed by means of toxicity reference values (TRVs). Application of the framework to many emerging compounds such as novel flame retardants was not possible because of either no or outdated TRVs. Concurrent identification of seven SVOC groups in indoor environments provided information on their comparative levels and distributions, their sources, and informed our assessment of associated risks.
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Affiliation(s)
- Hale Demirtepe
- RECETOX, Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic
| | - Lisa Melymuk
- RECETOX, Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic.
| | - Miriam L Diamond
- Department of Earth Sciences, and Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Lola Bajard
- RECETOX, Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic
| | - Šimon Vojta
- RECETOX, Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic
| | - Roman Prokeš
- RECETOX, Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic
| | - Ondřej Sáňka
- RECETOX, Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic
| | - Jana Klánová
- RECETOX, Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic
| | - Ľubica Palkovičová Murínová
- Department of Environmental Medicine, Faculty of Public Health, Slovak Medical University, Limbová 12, 83303 Bratislava, Slovakia
| | - Denisa Richterová
- Department of Environmental Medicine, Faculty of Public Health, Slovak Medical University, Limbová 12, 83303 Bratislava, Slovakia
| | - Vladimíra Rašplová
- Department of Environmental Medicine, Faculty of Public Health, Slovak Medical University, Limbová 12, 83303 Bratislava, Slovakia
| | - Tomáš Trnovec
- Department of Environmental Medicine, Faculty of Public Health, Slovak Medical University, Limbová 12, 83303 Bratislava, Slovakia
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86
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Sun Y, Liu LY, Sverko E, Li YF, Li HL, Huo CY, Ma WL, Song WW, Zhang ZF. Organophosphate flame retardants in college dormitory dust of northern Chinese cities: Occurrence, human exposure and risk assessment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 665:731-738. [PMID: 30893750 DOI: 10.1016/j.scitotenv.2019.02.098] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 01/31/2019] [Accepted: 02/06/2019] [Indexed: 06/09/2023]
Abstract
Organophosphate flame retardants (OPFRs) are widely added to consumer products and building materials, which may pose potential health risk to humans. But information on their contamination and human exposure in the indoor environment especially dormitories in northern China is rare. In this study, twelve OPFRs were investigated in college dormitory dust that collected from Harbin, Shenyang, and Baoding, in northern China. Indoor dust samples were also collected from homes and public microenvironments (PMEs) in Harbin for comparison. The median ∑OPFR concentrations in dormitory dust in Shenyang samples (8690 ng/g) were higher than those in Baoding (6540 ng/g) and Harbin (6190 ng/g). The median ∑OPFR concentrations in home dust (7150 ng/g) were higher than in dormitory and PME dust (5340 ng/g) in Harbin. Tris(2‑chloroethyl) phosphate (TCEP) and tris (2-chloroisopropyl) phosphate (TCIPP) were the most abundant chlorinated OPFRs, while triphenyl phosphate (TPHP) and tris(2‑butoxyethyl) phosphate (TBOEP) were the dominant non-chlorinated OPFRs. The daily intakes of ∑OPFR were estimated, with the median values for female students (2.45 ng/kg-day) higher than those for male students (2.15 ng/kg-day) while were similar to adults (2.45 ng/kg-day) in homes. The estimated daily intakes (EDI) of these OPFRs from indoor dust in Harbin were all below the recommended values. The calculated non-carcinogenic hazard quotients (10-8-10-3) from OPFRs were much lower than the theoretical risk threshold. Meanwhile, carcinogenic risk (CR) of tri‑n‑butyl phosphate (TNBP), TCEP, tris(2‑ethylhexyl) phosphate (TEHP), and tris(1,3‑dichloroisopropyl) phosphate (TDCIPP) were also estimated. The highest carcinogenic risk of TCEP for gender-specific and age-specific category range from 1.75 × 10-7 to 2.46 × 10-7 from exposure to indoor dust indicated a low potential carcinogenic risk for human exposure.
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Affiliation(s)
- Yu Sun
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
| | - Li-Yan Liu
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China.
| | - Ed Sverko
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China; IJRC-PTS-NA, Toronto M2N 6X9, Canada
| | - Yi-Fan Li
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China; IJRC-PTS-NA, Toronto M2N 6X9, Canada
| | - Hai-Ling Li
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
| | - Chun-Yan Huo
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
| | - Wan-Li Ma
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
| | - Wei-Wei Song
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
| | - Zi-Feng Zhang
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), State Key Laboratory of Urban Water Resource and Environment, and School of Environment, Harbin Institute of Technology, Harbin 150090, China; University Corporation for Polar Research, Beijing 100875, China
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87
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Bastiaensen M, Ait Bamai Y, Araki A, Van den Eede N, Kawai T, Tsuboi T, Kishi R, Covaci A. Biomonitoring of organophosphate flame retardants and plasticizers in children: Associations with house dust and housing characteristics in Japan. ENVIRONMENTAL RESEARCH 2019; 172:543-551. [PMID: 30852457 DOI: 10.1016/j.envres.2019.02.045] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 02/06/2019] [Accepted: 02/28/2019] [Indexed: 06/09/2023]
Abstract
Indoor environments contain a wide range of new chemicals such as phosphate flame retardants and plasticizers (PFRs). Despite recent epidemiological evidence suggesting that children might be affected by widespread exposure to PFRs, questions remain about the various exposure pathways to these chemicals. Therefore, the aim of this study was to investigate exposure to PFRs by measuring the concentrations a set of urinary metabolites for schoolchildren from Japan (n = 128) and associating them with house dust concentrations and housing characteristics. Detectable concentrations of both diaryl and dialkyl phosphates (DAPs) and hydroxylated metabolites (HO-PFRs) were found in urine samples of almost all children. 2-Hydroxyethyl bis(2-butoxyethyl) phosphate (BBOEHEP) was the most frequently detected metabolite (98%) followed by 1-hydroxy-2-propyl bis(1-chloro-2-propyl) phosphate (BCIPHIPP, 95%) and tris(chloroethyl) phosphate (TCEP). Next to BBOEHEP, two other metabolites of tris(2-butoxyethyl) phosphate (TBOEP) were also frequently detected. Significant correlations of moderate strength were found between parent compounds detected in high concentrations in house dust (TBOEP, tris(2-chloroisopropyl) phosphate (TCIPP)) and their corresponding metabolites, suggesting that dust is a primary exposure source for these PFRs. Several personal and housing characteristics, such as gender, income, and the use of PVC and ventilation were associated with metabolite concentrations in multivariate linear regression. Overall, this study showed that Japanese schoolchildren are exposed to a wide range of PFRs.
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Affiliation(s)
- Michiel Bastiaensen
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium.
| | - Yu Ait Bamai
- Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Atsuko Araki
- Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Nele Van den Eede
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Toshio Kawai
- Osaka Occupational Health Service Center, Japan Industrial Safety and Health Association, 2-3-8, Tosabori, Nishi-ku, Osaka 550-0001, Japan
| | - Tazuru Tsuboi
- Osaka Occupational Health Service Center, Japan Industrial Safety and Health Association, 2-3-8, Tosabori, Nishi-ku, Osaka 550-0001, Japan
| | - Reiko Kishi
- Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Adrian Covaci
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium.
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88
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Yin H, Wu D, You J, Li S, Deng X, Luo Y, Zheng W. Occurrence, Distribution, and Exposure Risk of Organophosphate Esters in Street Dust from Chengdu, China. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 76:617-629. [PMID: 30840114 DOI: 10.1007/s00244-019-00602-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 01/24/2019] [Indexed: 06/09/2023]
Abstract
Street dust samples were collected from 31 sampling sites in urban area of Chengdu. The distribution characters of OPEs were analyzed in line with functional districts and industrial layout of the city. The results showed that the detection frequency was tris(2-carboxyethyl) phosphine (TCEP), trichloropropyl phosphate (TCPP), triphenyl phosphate (TPhP), and tributoxyethyl phosphate (TBEP) (100%) > tris(2-ethylhexyl) phosphate (TEHP) (93.5%) > tri-n-butyl phosphate (TnBP) (83.9%) > tridichloropropyl phosphate (TDCPP) (74.2%). The ∑7OPEs concentrations ranged from 94.0 to 1484.6 ng/g (mean 512.9 ± 417.5 ng/g), and TBEP was the predominant pollutant, accounting for 27.9% of the ∑7OPEs. The highest concentrations were observed in the center, west, and northwest sides of the city. Besides, compared with outer area, the higher concentration in the 1st Ring Road reflected that emissions of OPEs might be associated with the population and consumption of commercial products. The correlations between monomers were statistically significant (p < 0.05) for TnBP/TCPP (p = 0.002), TCEP/TCPP (p = 0.026), and TCEP/TPhP (p = 0.033). The exposure level in adults was 0.11 ng/(kg bw day), and in children was 0.20 ng/(kg bw day) while hand-to-mouth was the primary mode of transmission. The Risk Quotients (RQs) of OPEs were 5.35 × 10-10-1.46 × 10-5 and 4.99 × 10-10-2.82 × 10-5 for adults and children respectively, with no potential risk.
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Affiliation(s)
- Hongling Yin
- College of Resources and Environment, Chengdu University of Information Technology, No. 24 Xuefu Street, Chengdu, 610041, Sichuan, China.
| | - Di Wu
- College of Resources and Environment, Chengdu University of Information Technology, No. 24 Xuefu Street, Chengdu, 610041, Sichuan, China
| | - Junjie You
- College of Resources and Environment, Chengdu University of Information Technology, No. 24 Xuefu Street, Chengdu, 610041, Sichuan, China
| | - Shiping Li
- College of Resources and Environment, Chengdu University of Information Technology, No. 24 Xuefu Street, Chengdu, 610041, Sichuan, China
| | - Xu Deng
- College of Resources and Environment, Chengdu University of Information Technology, No. 24 Xuefu Street, Chengdu, 610041, Sichuan, China
| | - Yi Luo
- College of Resources and Environment, Chengdu University of Information Technology, No. 24 Xuefu Street, Chengdu, 610041, Sichuan, China
| | - Wanqing Zheng
- College of Resources and Environment, Chengdu University of Information Technology, No. 24 Xuefu Street, Chengdu, 610041, Sichuan, China
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89
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He MJ. Organophosphate Esters in Road Dust from a Suburban Area of Chongqing, China: Characterization of Particle Size Distribution and Human Exposure. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 76:630-639. [PMID: 30838427 DOI: 10.1007/s00244-019-00612-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 02/25/2019] [Indexed: 06/09/2023]
Abstract
Four types of road dust, including main road, industrial road, campus road, and campus walking street dust, were analyzed in a suburban area of Chongqing, western China. The organophosphate esters (OPEs) concentrations varied from 3.69 to 1600 ng/g dry weight, with a median of 292, 476, 203, and 48.8 ng/g dw in main road, industrial road, campus road, and campus walking street dust, respectively. The industrial sources should be responsible for the elevated OPEs concentrations in industrial road dust, while the vehicle emissions may play a role in the OPEs distribution in main road dust. Semblable OPEs composition patterns were observed among different types of road dust; tributyl phosphate predominated followed by tris(methylphenyl) phosphate. Significantly positive correlations were obtained between industrial road dust and campus road dust and main road dust, respectively, and statistical correlations also were found between main road dust and other road dust. An increasing trend of OPEs was displayed with the descending particle size in industrial road dust, whereas highest values were at F3 (90-150 μm) (340 ng/g dw) and F5 (< 75 μm) (305 ng/g dw), with a peak value at F3 in main road dust. This result may suggest that OPEs are prone to accumulate in finer particles. The estimated daily intake values for toddlers were approximately two times greater than those for adults in each region, implying that toddlers may be more vulnerable to OPEs intake via road dust.
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Affiliation(s)
- Ming-Jing He
- College of Resources and Environment, Southwest University, Chongqing, 400716, China.
- Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400716, China.
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90
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Abdullah A, O’Shea KE. TiO2 photocatalytic degradation of the flame retardant tris (2-chloroethyl) phosphate (TCEP) in aqueous solution: A detailed kinetic and mechanistic study. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.03.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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91
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Givehchi R, Maestre JP, Bi C, Wylie D, Xu Y, Kinney KA, Siegel JA. Quantitative filter forensics with residential HVAC filters to assess indoor concentrations. INDOOR AIR 2019; 29:390-402. [PMID: 30624800 DOI: 10.1111/ina.12536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 11/19/2018] [Accepted: 12/12/2018] [Indexed: 06/09/2023]
Abstract
Analysis of the dust from heating, ventilation, and air conditioning (HVAC) filters is a promising long-term sampling method to characterize airborne particle-bound contaminants. This filter forensics (FF) approach provides valuable insights about differences between buildings, but does not allow for an estimation of indoor concentrations. In this investigation, FF is extended to quantitative filter forensics (QFF) by using measurements of the volume of air that passes through the filter and the filter efficiency, to assess the integrated average airborne concentrations of total fungal and bacterial DNA, 36 fungal species, endotoxins, phthalates, and organophosphate esters (OPEs) based on dust extracted from HVAC filters. Filters were collected from 59 homes located in central Texas, USA, after 1 month of deployment in each summer and winter. Results showed considerable differences in the concentrations of airborne particle-bound contaminants in studied homes. The airborne concentrations for most of the analytes are comparable with those reported in the literature. In this sample of homes, the HVAC characterization measurements varied much less between homes than the variation in the filter dust concentration of each analyte, suggesting that even in the absence of HVAC data, FF can provide insight about concentration differences for homes with similar HVAC systems.
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Affiliation(s)
- Raheleh Givehchi
- Department of Civil and Mineral Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Juan P Maestre
- Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, Texas
| | - Chenyang Bi
- Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, Texas
| | - Dennis Wylie
- Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, Texas
| | - Ying Xu
- Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, Texas
| | - Kerry A Kinney
- Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, Texas
| | - Jeffrey A Siegel
- Department of Civil and Mineral Engineering, University of Toronto, Toronto, Ontario, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
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92
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Khairy MA, Lohmann R. Organophosphate flame retardants in the indoor and outdoor dust and gas-phase of Alexandria, Egypt. CHEMOSPHERE 2019; 220:275-285. [PMID: 30590294 DOI: 10.1016/j.chemosphere.2018.12.140] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 12/17/2018] [Accepted: 12/19/2018] [Indexed: 05/28/2023]
Abstract
Little is known about the presence of organophosphate flame retardants (OPFRs) as a substitute for polybrominated diphenyl ethers in developing countries. This study investigated - for the first time - concentrations, sources and exposure levels of OPFRs in the indoor and outdoor environments of Alexandria, Egypt, in dust and gas-phase samples. Passive samplers were deployed (n = 78) to determine gaseous concentrations, and various dust samples were collected from apartments (n = 25), working places (n = 14), cars (n = 18), and outdoors (OD, n = 30). Indoor concentrations (air: 7.0-64 pg/m3; dust: 150-1850 ng/g) were significantly higher than outdoor (2.0-16 pg/m3 and 83-475 ng/g) concentrations. Tris-1,3-dichloropropyl phosphate (TDCIPP), tris(1-chloro-2-propyl) phosphate (TCIPP), tri (2-butoxyethyl) phosphate (TBOEP) and triphenyl phosphate (TPHP) dominated in all samples with more indoor variabilities. Profiles of OPFRs in OD and floor dust (collected from carpets and floors) were similar but differed from elevated fine dust (collected 1 m above the floor from all available surfaces), possibly due to the influence of carryover of OD by shoes. Despite the high uncertainty in dust - air partitioning coefficients, log transformed values showed significant linear relationships with log octanol - air-partitioning coefficients in all microenvironments, indicating an equilibrium partitioning between dust and vapor. Exposure assessment indicated the importance of the dermal exposure route for adults and ingestion route for children.
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Affiliation(s)
- Mohammed A Khairy
- Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA; Department of Environmental Sciences, Faculty of Science, Alexandria University, 21511, Moharam Bek, Alexandria, Egypt.
| | - Rainer Lohmann
- Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA
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93
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Tokumura M, Ogo S, Kume K, Muramatsu K, Wang Q, Miyake Y, Amagai T, Makino M. Comparison of rates of direct and indirect migration of phosphorus flame retardants from flame-retardant-treated polyester curtains to indoor dust. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 169:464-469. [PMID: 30472470 DOI: 10.1016/j.ecoenv.2018.11.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 11/09/2018] [Accepted: 11/13/2018] [Indexed: 06/09/2023]
Abstract
In this study, the pathways for migration of phosphorus flame retardants (PFRs), tris(1,3-dichloroisopropyl) phosphate (TDCPP) and tricresyl phosphate (TCsP) which were detected from curtains often, from flame-retardant-treated polyester curtains to indoor dust were investigated. Two possible migration pathways were compared quantitatively: (1) an indirect pathway in which the PFRs in the curtains first evaporate from the curtains and are then adsorbed onto indoor dust and (2) a direct pathway in which the PFRs are directly transferred to dust placed on the curtains. The contribution of the indirect pathway was evaluated by means of emission cell tests, which showed that the area-specific emission rates from curtains treated with PFRs were 0.044 (TDCPP, Curtain 5), 0.17 (TDCPP, Curtain 8), and 0.060 (TCsP, Curtain 12) μg m-2 h-1 at 20 °C (averaged during 24 h). The contribution of the direct pathway was evaluated by measurement of the time dependence of PFR concentrations on the indoor dust placed on the curtains. These measurements indicated that PFR concentrations on the dust increased with time and that the direct migration rates of PFRs from curtains treated with PFRs were 4.4 (TDCPP, Curtain 5), 12 (TDCPP, Curtain 8), and 7.0 (TCsP, Curtain 12) μg m-2 h-1 at 20 °C (averaged during 24 h), or 71-120 times the indirect migration rate. This result suggests that the direct pathway can be expected to predominate.
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Affiliation(s)
- Masahiro Tokumura
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan
| | - Sayaka Ogo
- Shizuoka Institute of Environment and Hygiene, Shizuoka, Japan
| | | | - Kosuke Muramatsu
- Department of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan
| | - Qi Wang
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan
| | - Yuichi Miyake
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan.
| | - Takashi Amagai
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan.
| | - Masakazu Makino
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan
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94
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Shoeib T, Webster GM, Hassan Y, Tepe S, Yalcin M, Turgut C, Kurt-Karakuş PB, Jantunen L. Organophosphate esters in house dust: A comparative study between Canada, Turkey and Egypt. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 650:193-201. [PMID: 30196219 DOI: 10.1016/j.scitotenv.2018.08.407] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 08/28/2018] [Accepted: 08/28/2018] [Indexed: 06/08/2023]
Abstract
Organophosphate esters (OPEs) are commonly used as flame retardants (FRs) and plasticizers. The usage of OPEs has increased recently due to the ban of several brominated flame retardants, but information on levels in the environment, including the indoor environment is still limited. We investigated the occurrence and distribution of 12 OPEs in urban house dust from Vancouver, Canada; Istanbul, Turkey; and Cairo, Egypt. The median ∑OPE concentration was 41.4 μg/g in the Vancouver samples while median levels in Istanbul and Cairo were significantly lower. The median composition profiles of OPEs in Vancouver and Cairo were dominated by tris (2-butoxyethyl) phosphate (TBOEP), accounting for 56 and 92% of total OPEs respectively while it showed a detection frequency of only 14% in Istanbul. Tris (2-chloropropyl) phosphate (TCPP) was the most abundant chlorinated OPE representing 20 and 36% of the total OPEs in Vancouver and Istanbul respectively, but was below the detection limit in the Cairo dust samples. Consistent with other studies, ΣOPE concentrations were ~1 to 2 orders of magnitude higher than PBDEs and currently used flame retardants in the same dust samples. The mean estimated daily intakes (EDI) of ΣOPE from dust were 115, 38 and 9 ng/kg/bw/day in Vancouver, Cairo and Istanbul respectively for toddlers where adults were ~10 times lower. The total toddler OPE intake ranged from 115 to 2900, 38 to 845 and from 9 to 240 ng/kg bw/day across the three cities. TBOEP had the largest contribution to the EDI in both toddler and adults, where toddler TBOEP exposures via dust represented 4% to 80%, 2% to 44% and 0.1% to 6% of the Reference Doses (RfD) in the mean and high intake scenarios for toddlers in Vancouver, Cairo and Istanbul respectively.
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Affiliation(s)
- Tamer Shoeib
- Department of Chemistry, The American University in Cairo, New Cairo 11835, Egypt.
| | - Glenys M Webster
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - Yasmeen Hassan
- Department of Chemistry, The American University in Cairo, New Cairo 11835, Egypt
| | - Sedef Tepe
- Department of Environmental Engineering, Faculty of Civil Engineering, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
| | - Melis Yalcin
- Faculty of Agriculture, Adnan Menderes University, 09100 Aydin, Turkey
| | - Cafer Turgut
- Faculty of Agriculture, Adnan Menderes University, 09100 Aydin, Turkey
| | - Perihan Binnur Kurt-Karakuş
- Department of Environmental Engineering, Faculty of Engineering and Natural Sciences, Bursa Technical University, 16310 Yildirim/Bursa, Turkey
| | - Liisa Jantunen
- Air Quality Processes Research Section, Environment and Climate Change Canada, 6248 Eighth Line, Egbert, ON, Canada
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95
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Yadav IC, Devi NL, Singh VK, Li J, Zhang G. Measurement of legacy and emerging flame retardants in indoor dust from a rural village (Kopawa) in Nepal: Implication for source apportionment and health risk assessment. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 168:304-314. [PMID: 30390529 DOI: 10.1016/j.ecoenv.2018.10.089] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 10/21/2018] [Accepted: 10/24/2018] [Indexed: 06/08/2023]
Abstract
Under the Stockholm Convention, signatory countries are obliged to direct source inventories, find current sources, and provide ecological monitoring evidence to guarantee that the encompassing levels of persistent organic pollutants (POPs) are declining. However, such monitoring of different types of POPs are to a great degree constrained in most developing countries including Nepal and are primarily confined to suspected source area/ densely populated regions. In this study, 9 polybrominated diphenyl ethers (PBDEs), 2 dechlorane plus (DPs), 6 novel brominated flame retardants (NBFRs) and 8 organophosphate ester flame retardants (OPFRs) were investigated in indoor dust from a rural area (Kopawa) in Nepal in order to evaluate their occurrence/level, profile, spatial distribution and their sources. Additionally, health risk exposure was estimated to anticipate the possible health risk to the local population. The results showed that OPFRs was the most abundant FR measured in the dust. The concentration of ∑8OPFRs was about 2, 3 and 4 orders of magnitude higher than the ∑6NBFRs, ∑9PBDEs, and ∑2DPs, respectively. Tris (methylphenyl) phosphate (TMPP) and Tris (2-ethylhexyl) phosphate (TEHP) were the most abundant OPFRs analyzed in the dust; while decabromodiphenyl ethane (DBDPE) exceeded among NBFRs. Likewise, 2,2',3,3',4,4',5,5',6,6'-decabromodiphenylether (BDE-209) was the most identified chemical among PBDEs. The total organic carbon (TOC) content in dust was significantly and positively connected with octa-BDEs (Rho = 0.615, p < 0.01), BTBPE (Rho = 0.733, p < 0.01), TPHP (Rho = 0.621, p < 0.01), TEHP (Rho = 0.560, p < 0.01) and TMPPs (Rho = 0.550, p < 0.01), while black carbon (BC) was either weakly related or not related, suggesting little or no impact of BC in the distribution of FRs. Principal component analysis indicated the contribution from commercial penta-, octa- and deca-BDEs formulation, the adhesive substance, food packaging and paints, and degradation of BDE-209 as the essential sources of FRs. Health risk exposure estimates showed that dermal absorption via dust as the primary route of FRs intake. The estimated daily exposure of PBDEs, NBFRs and OPFRs were 2-10 orders of magnitude lower than their corresponding reference dose (RfD), suggesting insignificant risk. However, other routes such as inhalation and dietary intake might still be significant in the case of Kopawa which should be tested in future.
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Affiliation(s)
- Ishwar Chandra Yadav
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China; Department of International Environmental and Agricultural Science (IEAS), Tokyo University of Agriculture and Technology (TUAT) 3-5-8, Saiwai-Cho, Fuchu-Shi, Tokyo 1838509, Japan
| | - Ningombam Linthoingambi Devi
- Centre for Environmental Sciences, Central University of South Bihar, SH-7, Gaya-Panchanpur, Post-Fatehpur, P.S-Tekari, District-Gaya 824236, Bihar, India
| | - Vipin Kumar Singh
- Department of Botany, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India
| | - Jun Li
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China
| | - Gan Zhang
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China
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96
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He MJ, Lu JF, Wei SQ. Organophosphate esters in biota, water, and air from an agricultural area of Chongqing, western China: Concentrations, composition profiles, partition and human exposure. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 244:388-397. [PMID: 30352353 DOI: 10.1016/j.envpol.2018.10.085] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 10/13/2018] [Accepted: 10/18/2018] [Indexed: 06/08/2023]
Abstract
We measured the concentrations of organophosphate esters (OPEs) in some biotic samples which can serve as human foodstuffs and ambient environments including air and river water from an agricultural area of Chongqing, western China. Fish samples exhibited highest OPEs levels (960 ng/g lipid weight) among the biota, followed by chicken (676 ng/g lw), cattle (545 ng/g lw) and pigs (535 ng/g lw). Tributyl phosphate (TNBP), tris (2-methylpropyl) (TIBP) and chlorinated OPEs were the major analogs in biotic samples, which appeared similar with the patterns from river water and outdoor air, but apparently different from indoor air. To further investigate the influence of ambient environment on the distribution of OPEs in biota, we analyzed the correlation between OPEs concentrations in ambient environment and biological samples, and the results revealed that most of the samples (except for pig samples) heavily correlated with outdoor air, whereas only fish and cattle samples were strongly correlated with river water. The partitioning behaviors of OPEs among biota, air and river water were also studied through calculating the biota-water accumulation factors (BWAFs), biota-air accumulation factors (BAAFs) and air-water partitioning factor (AWPFs). Significantly linear correlations (P < 0.05) were observed between log (BWAFs) and log (KOW) values, and between log (AWPFs) and log H (Henry's law constants), nevertheless log (BAAFs) was increasing along with the log (KOA) values. The daily intake (DI) values were estimated via foodstuffs ingestion and environmental exposure. The estimated DI values of OPEs from food and ambient environments were 1.78 ng/kg-bw/day, 1.23 ng/kg-bw/day and 1.42 ng/kg-bw/day in toddlers, children and adults, respectively, which lay at the low end of the reported data and well below the reference dose (RfD).
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Affiliation(s)
- Ming-Jing He
- College of Resources and Environment, Southwest University, Chongqing, 400716, China; Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400716, China.
| | - Jun-Feng Lu
- College of Resources and Environment, Southwest University, Chongqing, 400716, China
| | - Shi-Qiang Wei
- College of Resources and Environment, Southwest University, Chongqing, 400716, China; Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400716, China
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97
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Ait Bamai Y, Araki A, Nomura T, Kawai T, Tsuboi T, Kobayashi S, Miyashita C, Takeda M, Shimizu H, Kishi R. Association of filaggrin gene mutations and childhood eczema and wheeze with phthalates and phosphorus flame retardants in house dust: The Hokkaido study on Environment and Children's Health. ENVIRONMENT INTERNATIONAL 2018; 121:102-110. [PMID: 30195067 DOI: 10.1016/j.envint.2018.08.046] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 08/21/2018] [Accepted: 08/21/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND AND AIM Exposure to phthalates and phosphorus flame retardants (PFRs) is considered to be a risk factor for asthma and allergies. However, little is known about the contribution of loss-of-function mutations in the gene encoding filaggrin (FLG) gene, which are considered to be predisposing factors for eczema and asthma, to these associations. We investigated the associations between exposure to phthalates and PFRs in dust and eczema/wheeze among Japanese children, taking into consideration loss-of-function mutations in FLG. METHODS This study was part of the Hokkaido study on Environment and Children's Health. Seven phthalates and 11 PFRs in household dust were measured by gas chromatography-mass spectrometry. Eczema and wheeze were assessed in children aged 7 years using the International Study of Asthma and Allergies in Childhood questionnaire. Eight FLG mutations previously identified in the Japanese population were extracted from cord blood samples. Children with one or more FLG mutations were considered to be positive for FLG mutations. The study included 296 children who had complete data (birth records, FLG mutations, first trimester and 7 years questionnaires, and phthalate/PFR levels). Odds ratios (ORs) and 95% confidential intervals (CIs) of eczema and wheeze were calculated for log-transformed phthalate/PFR levels by logistic regression. We also performed stratified analyses based on FLG mutations. RESULTS The prevalence rates of eczema and wheeze were 20.6% and 13.9%, respectively. Among children without any FLG mutations, tris (1, 3-dichloro-2-propyl) phosphate (TDCIPP) increased the OR of wheeze, (OR: 1.22, CI: 1.00-1.48). Significant p values for trends were found between tris (2-butoxyethyl) phosphate (TBOEP) and eczema and di-iso-nonyl phthalate (DiNP) and eczema among children without any FLG mutations, respectively. CONCLUSIONS Despite our limited sample size and cross-sectional study design, the effects of indoor environmental factors on childhood eczema and wheeze were clearer in children without loss-of-function mutations in FLG than in children with mutations. Children with FLG mutations might already be cared for differently in terms of medication or parental lifestyle. Further studies in larger populations are warranted so that severity of symptoms and combinations of FLG mutations can be investigated.
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Affiliation(s)
- Yu Ait Bamai
- Hokkaido University Center for Environmental and Health Sciences, North 12, West 7, Kita-ku, Sapporo 060-0812, Japan.
| | - Atsuko Araki
- Hokkaido University Center for Environmental and Health Sciences, North 12, West 7, Kita-ku, Sapporo 060-0812, Japan.
| | - Toshifumi Nomura
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Kita-ku, Sapporo 060-8638, Japan.
| | - Toshio Kawai
- Osaka Occupational Health Service Center, Japan Industrial Safety and Health Association, 2-3-8, Tosabori, Nishi-ku, Osaka 550-0001, Japan
| | - Tazuru Tsuboi
- Osaka Occupational Health Service Center, Japan Industrial Safety and Health Association, 2-3-8, Tosabori, Nishi-ku, Osaka 550-0001, Japan.
| | - Sumitaka Kobayashi
- Hokkaido University Center for Environmental and Health Sciences, North 12, West 7, Kita-ku, Sapporo 060-0812, Japan.
| | - Chihiro Miyashita
- Hokkaido University Center for Environmental and Health Sciences, North 12, West 7, Kita-ku, Sapporo 060-0812, Japan.
| | - Masae Takeda
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Kita-ku, Sapporo 060-8638, Japan
| | - Hiroshi Shimizu
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Kita-ku, Sapporo 060-8638, Japan.
| | - Reiko Kishi
- Hokkaido University Center for Environmental and Health Sciences, North 12, West 7, Kita-ku, Sapporo 060-0812, Japan.
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98
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Bi C, Maestre JP, Li H, Zhang G, Givehchi R, Mahdavi A, Kinney KA, Siegel J, Horner SD, Xu Y. Phthalates and organophosphates in settled dust and HVAC filter dust of U.S. low-income homes: Association with season, building characteristics, and childhood asthma. ENVIRONMENT INTERNATIONAL 2018; 121:916-930. [PMID: 30347374 DOI: 10.1016/j.envint.2018.09.013] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 09/06/2018] [Accepted: 09/07/2018] [Indexed: 05/20/2023]
Abstract
Phthalates and organophosphates are ubiquitous indoor semi-volatile organic contaminants (SVOCs) that have been widely used as plasticizers and flame retardants in consumer products. Although many studies have assessed their levels in house dust, only a few used dust samples captured by filters of building heating, ventilation, and air conditioning (HVAC) systems. HVAC filters collect particles from large volumes of air over a long period of time (potentially known) and thus provide a spatially and temporally integrated concentration. This study measured concentrations of phthalates and organophosphates in HVAC filter dust and settled floor dust collected from low-income homes in Texas, United States, in both the summer and winter seasons. The most frequently detected compounds were benzyl butyl phthalate (BBzP), di-(2-ethylhexyl) phthalate (DEHP), di-n-octyl phthalate (DnOP), tris (1-chloro-2-propyl) phosphate (TCIPP), triphenyl phosphate (TPHP), and tris (1,3-dichloroisopropyl) phosphate (TDCIPP). The median level of TCIPP in settled dust was 3- to 180-times higher than levels reported in other studies of residential homes. Significantly higher concentrations were observed in HVAC filter dust as compared to settled dust for most of the frequently detected compounds in both seasons, except for several phthalates in the winter. SVOC concentrations in settled dust in winter were generally higher than in summer, while different seasonality patterns were found for HVAC filter dust. Settled dust samples from homes with vinyl flooring contained significantly higher levels of BBzP and DEHP as compared to homes with other types of floor material. The concentration of DEHP and TDCIPP in settled dust also significantly associated with the presence of carpet in homes. Cleaning activities to remove dust from furniture actually increased the levels of certain compounds in HVAC filter dust, while frequent vacuuming of carpet helped to decrease the concentrations of some compounds in settled dust. Additionally, the size and age of a given house also correlated with the levels of some pollutants in dust. A statistically significant association between DEHP concentration in HVAC filter dust in summer and the severity of asthma in children was observed. These results suggest that HVAC filter dust represents a useful sampling medium to monitor indoor SVOC concentrations with high sensitivity; in contrast, when using settled dust, in addition to consideration of seasonal influences, it is critical to know the sampling location because the type and level of SVOCs may be related to local materials used there.
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Affiliation(s)
- Chenyang Bi
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, TX, USA
| | - Juan P Maestre
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, TX, USA
| | - Hongwan Li
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, TX, USA
| | - Ge Zhang
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, TX, USA; Department of Building Environment and Energy Application Engineering, University of Science and Technology Beijing, Beijing, China
| | - Raheleh Givehchi
- Department of Civil and Mineral Engineering, University of Toronto, Toronto, Canada
| | - Alireza Mahdavi
- Department of Civil and Mineral Engineering, University of Toronto, Toronto, Canada
| | - Kerry A Kinney
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, TX, USA
| | - Jeffrey Siegel
- Department of Civil and Mineral Engineering, University of Toronto, Toronto, Canada; Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Sharon D Horner
- School of Nursing, The University of Texas at Austin, TX, USA
| | - Ying Xu
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, TX, USA; Department of Building Science, Tsinghua University, Beijing, China.
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99
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Liu J, Safronava N, Lyon RE, Maia J, Ishida H. Enhanced Thermal Property and Flame Retardancy via Intramolecular 5-Membered Ring Hydrogen Bond-Forming Amide Functional Benzoxazine Resins. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b02033] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jia Liu
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Natallia Safronava
- Technology and Management International, LLC, Toms River, New Jersey 08753, United States
| | - Richard E. Lyon
- Fire Safety Branch ANG-E21, Federal Aviation Administration, Building 277, William J. Hughes Technical Center, Atlantic
City International Airport, Atlantic City, New Jersey 08405, United States
| | - Joao Maia
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Hatsuo Ishida
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
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100
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Bastiaensen M, Xu F, Been F, Van den Eede N, Covaci A. Simultaneous determination of 14 urinary biomarkers of exposure to organophosphate flame retardants and plasticizers by LC-MS/MS. Anal Bioanal Chem 2018; 410:7871-7880. [DOI: 10.1007/s00216-018-1402-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 08/22/2018] [Accepted: 09/25/2018] [Indexed: 12/22/2022]
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