701
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Isomers of tris(chloropropyl) phosphate (TCPP) in technical mixtures and environmental samples. Anal Bioanal Chem 2017; 409:6989-6997. [PMID: 29147747 DOI: 10.1007/s00216-017-0572-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 07/20/2017] [Accepted: 08/05/2017] [Indexed: 01/12/2023]
Abstract
Tris(chloropropyl) phosphate (TCPP) is an environmentally abundant organophosphate ester (OPE). TCPP is comprised of four isomers with seven possible structures, eight CAS numbers, and even more common names. A review of 54 studies reporting one or more TCPP isomers confirmed that the most abundant and most often reported TCPP isomer was tris(2-chloro-1-methylethyl) phosphate, also known as tris(chloroisopropyl) phosphate (TCiPP, referred to hereafter as TCPP1). Full-scan gas chromatography-mass spectrometry (GC-MS) was used to identify the other three isomers numbered here according to their elution order on a non-polar GC column (DB-5): bis(2-chloro-1-methylethyl) (2-chloropropyl) phosphate (TCPP2), bis(2-chloropropyl)(2-chloro-1-methylethyl) phosphate (TCPP3), and tris(2-chloropropyl) phosphate (TCPP4). GC with a flame ionization detector (FID) was used to identify the relative abundances of the isomers in commercially available standards with unknown isomer composition. In technical TCPP, TCPP1-4 isomers averaged 71 ± 1, 26 ± 0.4, 3 ± 0.5, and 0.1 ± 0.02%, respectively. When these percent masses are incorporated into GC-MS quantification, response factors (RFs) for TCPP1 and TCPP2 are significantly different from TCPP3 and TCPP4, indicating that the multiple RF approach is more accurate than the commonly employed single RF method. Samples from urban streams and wastewater treatment plant (WWTP) effluent from Toronto, Canada, had isomeric ratios of TCPP1/2 that were not significantly different from a technical mixture whereas rain had a significantly different ratio indicating enrichment in the more volatile TCPP1 isomer. Reporting TCPP isomers can provide insight into sources, transport, and fate of TCPP in the environment. Graphical Abstract ᅟ.
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702
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Ye J, Liu J, Li C, Zhou P, Wu S, Ou H. Heterogeneous photocatalysis of tris(2-chloroethyl) phosphate by UV/TiO 2: Degradation products and impacts on bacterial proteome. WATER RESEARCH 2017; 124:29-38. [PMID: 28738271 DOI: 10.1016/j.watres.2017.07.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 06/27/2017] [Accepted: 07/15/2017] [Indexed: 05/22/2023]
Abstract
The widespread, persistent and toxic organophosphorus esters (OPEs) have become one category of emerging environmental contaminants. Thus, it is in urgent need to develop a cost-effective and safe treatment technology for OPEs control. The current study is a comprehensive attempt to use UV/TiO2 heterogeneous photocatalysis for the degradation of a water dissolved OPEs, tris(2-chloroethyl) phosphate (TCEP). A pseudo-first order degradation reaction with a kobs of 0.3167 min-1 was observed, while hydroxyl radical may be the dominating reactive oxidative species. As the reaction proceeded, TCEP was transformed to a series of hydroxylated and dechlorinated products. The degradation efficiency was significantly affected by pH value, natural organic matters and anions, implying that the complete mineralization of TCEP would be difficult to achieve in actual water treatment process. Based on the proteomics analysis regarding the metabolism reactions, pathways and networks, the significant activation of transmembrane transport and energy generation in Escherichia coli exposed to preliminary degrading products suggested that they can be transported and utilized through cellular metabolism. Furthermore, the descending trend of stress resistance exhibited that the toxicity of products was obviously weakened as the treatment proceeded. In conclusion, hydroxylation and dechlorination of TCEP with incomplete mineralization were likewise effective for its detoxification, indicating that UV/TiO2 will be an alternative treatment method for OPEs control.
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Affiliation(s)
- Jinshao Ye
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China; Joint Genome Institute, Lawrence Berkeley National Laboratory, Walnut Creek 94598, CA, USA
| | - Juan Liu
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Chongshu Li
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Pulin Zhou
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Shuang Wu
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Huase Ou
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China.
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703
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Cheng R, Jia Y, Dai L, Liu C, Wang J, Li G, Yu L. Tris(1,3-dichloro-2-propyl) phosphate disrupts axonal growth, cholinergic system and motor behavior in early life zebrafish. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2017; 192:7-15. [PMID: 28898785 DOI: 10.1016/j.aquatox.2017.09.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 08/30/2017] [Accepted: 09/02/2017] [Indexed: 06/07/2023]
Abstract
Tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) could have neurotoxic effects and alter motor behaviors in zebrafish (Danio rerio) larvae, however, the underlying mechanisms are still unknown. In this study, zebrafish embryos were subjected to waterborne exposure of TDCIPP at 100, 300, 600, 900μg/L from 2 to 120-h post-fertilization (hpf). Behavioral measurements indicate that TDCIPP exposure significantly elevated spontaneous movement, and altered swimming behavior response of larvae to both light and dark stimulation. Interestingly, in accordance with these motor effects, TDCIPP significantly decreased expression of the neuron-specific GFP in transgenic (HuC-GFP) zebrafish larvae as well as decreased expression of the neural marker genes elavl3 and ngn1, inhibited the axonal growth of the secondary motoneurons and altered the expressions of axon-related genes (α1-tubulin, shha and netrin2) in zebrafish larvae. Furthermore, TDCIPP exposure at 900μg/L significantly increased the activity of acetylcholinesterase (AChE) enzyme, and decreased the total acetylcholine (ACh) concentration. Our data indicate that the alteration in motor neuron and inhibition of cholinergic system could together lead to the TDCIPP induced motor behavior alterations in zebrafish larvae.
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Affiliation(s)
- Rui Cheng
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Yali Jia
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Lili Dai
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, China
| | - Chunsheng Liu
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China; Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Hunan Changde 415000, China; Hubei Provincial Engineering Laboratory for Pond Aquaculture, China
| | - Jianghua Wang
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Guangyu Li
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Liqin Yu
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China.
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704
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Zhou L, Hiltscher M, Püttmann W. Occurrence and human exposure assessment of organophosphate flame retardants in indoor dust from various microenvironments of the Rhine/Main region, Germany. INDOOR AIR 2017; 27:1113-1127. [PMID: 28556503 DOI: 10.1111/ina.12397] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 05/23/2017] [Indexed: 06/07/2023]
Abstract
We analyzed organophosphate flame retardants (OPFRs) in 74 indoor dust samples collected from seven microenvironments (building material markets, private cars, daycare centers, private homes, floor/carpet stores, offices, and schools) in the Rhine/Main region of Germany. Ten of 11 target OPFRs were ubiquitously detected, some with more than 97% detection frequency, including tris(1,3-dichloroisopropyl)phosphate (TCIPP), tris(2-butoxyethyl)phosphate (TBOEP), triphenyl phosphate (TPHP), and tris(isobutyl) phosphate (TIBP). Total concentrations (∑OPFRs) ranged from 5.9 to 4800 μg/g, with TBOEP and TCIPP being the most abundant congeners. The ∑OPFRs in schools, private cars, offices, and daycare centers were significantly (P<.05) higher than in private homes. The ∑OPFRs for building material markets (19 μg/g) and floor/carpet stores (20 μg/g) showed no significant difference to the other microenvironments, likely because of forced ventilation. The profiles of OPFRs in dust samples from offices and private homes were highly similar, while profiles from the other five microenvironments were substantially different. Comparison of our results with previous studies indicates a significant global variation in OPFR concentrations and their profiles, reflecting distinct fire safety regulations in different countries and/or different sampling strategies. Dust ingestion constitutes the major exposure pathway to OPFRs for toddlers, while air inhalation is the major pathway for adults.
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Affiliation(s)
- L Zhou
- Department of Environmental Analytical Chemistry, Institute of Atmospheric and Environmental Sciences, J. W. Goethe-University Frankfurt am Main, Frankfurt am Main, Germany
| | - M Hiltscher
- Department of Environmental Analytical Chemistry, Institute of Atmospheric and Environmental Sciences, J. W. Goethe-University Frankfurt am Main, Frankfurt am Main, Germany
| | - W Püttmann
- Department of Environmental Analytical Chemistry, Institute of Atmospheric and Environmental Sciences, J. W. Goethe-University Frankfurt am Main, Frankfurt am Main, Germany
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705
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Determination of Seven Urinary Metabolites of Organophosphate Esters using Liquid Chromatography-Tandem Mass Spectrometry. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2017. [DOI: 10.1016/s1872-2040(17)61048-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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706
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Vojta Š, Melymuk L, Klánová J. Changes in Flame Retardant and Legacy Contaminant Concentrations in Indoor Air during Building Construction, Furnishing, and Use. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:11891-11899. [PMID: 28910084 DOI: 10.1021/acs.est.7b03245] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A newly constructed university building was selected for targeted assessment of changes in the levels of flame retardants and legacy contaminants during the installation of building equipment, furniture, electronics, and first year of building use. Indoor air samples were collected during several periods of intensive equipment installation to determine a relationship between newly introduced equipment and changes in the concentrations and profiles of contaminants in indoor air. Samples were analyzed for polybrominated diphenyl ethers (PBDEs), hexabromocyclododecanes (HBCDDs), and new types of flame retardants: brominated (BFRs) and organophosphate esters (OPEs). Additionally, typical outdoor contaminants such as polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were also analyzed for comparison. From the set of 90 compounds analyzed here, hexabromobenzene (HBB) and tris(2-chloroisopropyl)phosphate (TCIPP) showed a significant concentration increase in indoor air concentrations during computer installation and operation, suggesting emission by operating computers, while an order of magnitude concentration increase in tris(1,3-dichloro-2-propyl)phosphate (TDCIPP) and tri-m-cresyl phosphate (TMTP) was observed after the furniture and carpet was introduced to the computer room, suggesting furniture or carpet as a source. However, the majority of compounds had no systematic change in concentrations during equipment installation, indicating that no sources of target compounds were introduced or, that source introduction was not reflected in indoor air concentrations. Generally, low levels of legacy flame retardants compared to their novel alternatives were observed.
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Affiliation(s)
- Šimon Vojta
- Research Centre for Toxic Compounds in the Environment (RECETOX), Kamenice 753/5, 62500 Brno, Czech Republic
| | - Lisa Melymuk
- Research Centre for Toxic Compounds in the Environment (RECETOX), Kamenice 753/5, 62500 Brno, Czech Republic
| | - Jana Klánová
- Research Centre for Toxic Compounds in the Environment (RECETOX), Kamenice 753/5, 62500 Brno, Czech Republic
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707
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Naccarato A, Elliani R, Sindona G, Tagarelli A. Multivariate optimization of a microextraction by packed sorbent-programmed temperature vaporization-gas chromatography–tandem mass spectrometry method for organophosphate flame retardant analysis in environmental aqueous matrices. Anal Bioanal Chem 2017; 409:7105-7120. [DOI: 10.1007/s00216-017-0669-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 09/17/2017] [Accepted: 09/21/2017] [Indexed: 11/30/2022]
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708
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Wang Y, Hou M, Zhang Q, Wu X, Zhao H, Xie Q, Chen J. Organophosphorus Flame Retardants and Plasticizers in Building and Decoration Materials and Their Potential Burdens in Newly Decorated Houses in China. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:10991-10999. [PMID: 28866882 DOI: 10.1021/acs.est.7b03367] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Organophosphorus flame retardants (OPFRs) have been increasingly used in various building and decoration materials to fulfill fire safety standards since the phasing out of polybrominated diphenyl ethers. We determined OPFR concentrations in the most commonly used building and decoration materials available in local markets and online in China. The OPFR concentrations varied significantly, from 14.78 ng/g (putty powder) to 9649000 ng/g (expanded polystyrene panel (EPS)). Relatively high concentrations of OPFRs were found in foam samples, followed by nonwoven and polyvinyl chloride (PVC) wallpaper, PVC pipes, sealing materials, boards, and paints. Low concentrations were found mostly in wall decoration powders, suggesting that no OPFRs had been added to these powders. Tris(1-chloro-2-propyl) phosphate and tris(1,3-dichloro-2-propyl) phosphate were the most detected halogenated OPFRs, while tri-n-butyl phosphate and tris(2-butoxyethyl) phosphate were the dominant nonhalogenated OPFRs, implying that they are commonly used in building and decoration materials. The estimated OPFR burden in interior decoration using nonwoven wallpaper was 330- and 2110-fold higher than that using latex paint and diatomite, respectively. The emission periods of OPFRs from nonwoven and PVC wallpaper may be greater than 13 years. We estimated that the total burden of OPFRs for decoration using wallpaper in newly decorated houses in China is ∼63 t/y. Significantly higher concentrations of OPFRs in interior decoration materials, especially nonwoven wallpaper, pose potential health risks to the people using the buildings.
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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
| | - Minmin Hou
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology , Dalian 116024, China
| | - Qiaonan Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology , Dalian 116024, China
| | - Xiaowei Wu
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology , Dalian 116024, 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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709
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Yadav IC, Devi NL, Zhong G, Li J, Zhang G, Covaci A. Occurrence and fate of organophosphate ester flame retardants and plasticizers in indoor air and dust of Nepal: Implication for human exposure. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 229:668-678. [PMID: 28704803 DOI: 10.1016/j.envpol.2017.06.089] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 05/27/2017] [Accepted: 06/27/2017] [Indexed: 06/07/2023]
Abstract
The present study was carried out in Nepal, a landlocked country located between world's two most populous countries i.e. India and China. In this study, the occurrence, profiles, spatial distributions and fate of eight organophosphate ester flame retardants (OPFRs) were investigated in indoor air and house dust. Overall, the concentrations of ∑OPFR were in the range of 153-12100 ng/g (median732 ng/g) and 0.32-64 ng/m3 (median 5.2 ng/m3) in house dust and indoor air, respectively. The sources of high OPFR in the indoor environment could be from locally used wide variety of consumer products and building materials in Nepalese houses. Significantly, high concentration of tri-cresyl phosphate (TMPP) was found both in air and dust, while tri (2-ethylhexyl) phosphate (TEHP) had the highest concentration in air samples. It might be due to fact that the high concentrations of TMPP are related to intense traffic and/or nearby airports. On the other hand, significantly high concentration of TEHP could be due to anthropogenic activities. Only TEHP showed positive correlation between indoor air and house dust (Rho = 0.517, p < 0.01), while rest of compounds were either less correlated or not correlated at all. The estimated human exposure to ∑OPFR via different pathway of intake suggested dermal absorption via indoor dust as major pathway of human exposure to both children and adult population. However, other pathways of OPFR intake such as dietary or dermal absorption via soil may still be significant in case of Nepal.
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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.
| | | | - Guangcai Zhong
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China
| | - 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
| | - Adrian Covaci
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
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710
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Wang G, Shi H, Du Z, Chen H, Peng J, Gao S. Bioaccumulation mechanism of organophosphate esters in adult zebrafish (Danio rerio). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 229:177-187. [PMID: 28599202 DOI: 10.1016/j.envpol.2017.05.075] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 05/05/2017] [Accepted: 05/27/2017] [Indexed: 06/07/2023]
Abstract
Although organophosphate esters (OPEs) have been detected with growing frequency in water ecosystems, the underlying accumulation mechanisms of these compounds in fish are still unknown. Here, we investigated the tissue-specific accumulation and depuration of seven OPEs in adult zebrafish at three levels (0, 1/150 LC50 (environmentally relevant level), and 1/30 LC50 per OPE congener) in laboratory after 19 days exposure and 3 days depuration. The bioaccumulation of OPEs varied among tissues. Muscle contained the lowest level of OPEs and liver had the highest level of two (TPP and TCEP) of the seven OPEs at steady state. The high levels and slow depuration rates of TDCIPP, TPHP, and TCP observed in roe indicated that the accumulated OPEs were potentially stored in roe and transferred to the next generation. After examination of the major metabolites (organophosphate diesters) in selected tissues, a physiologically based toxicokinetic (PBTK) model used in fish was adopted to explore the key factors affecting the bioaccumulation of OPEs in zebrafish. Biotransformation of OPEs with polychlorinated alkyl moieties (i.e. TDCIPP) and aryl moieties (i.e. TPHP and TCP) has more significant impacts on the accumulation than those of OPEs with alkyl or short chain chlorinated alkyl moieties. Furthermore, the partition process between tissues and blood was also investigated, and was demonstrated to be the dominant process for OPEs accumulation in zebrafish. This study provides critical information on the bioaccumulation, tissue distribution, and metabolization of OPEs in relation with OPE structures in fish, as well as the underlying bioaccumulation mechanisms/pathways of OPEs in aquatic life.
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Affiliation(s)
- Guowei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China
| | - Huanhuan Shi
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China
| | - Zhongkun Du
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China
| | - Hanyan Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China
| | - Jianbiao Peng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China
| | - Shixiang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China.
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711
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Hou R, Liu C, Gao X, Xu Y, Zha J, Wang Z. Accumulation and distribution of organophosphate flame retardants (PFRs) and their di-alkyl phosphates (DAPs) metabolites in different freshwater fish from locations around Beijing, China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 229:548-556. [PMID: 28688305 DOI: 10.1016/j.envpol.2017.06.097] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 05/31/2017] [Accepted: 06/28/2017] [Indexed: 06/07/2023]
Abstract
Organophosphate flame retardants (PFRs) can be rapidly metabolized in the body, and recent studies have shown that the di-alkyl phosphates (DAPs) are important metabolites. The accumulation and distribution of 8 PFRs and their 4 DAPs metabolites were first investigated in whole-body samples and various tissues of three freshwater fish species (topmouth gudgeon, crucian carp and loach) with different feeding habits from locations around Beijing, China. Concentrations of ΣPFRs in whole-body samples across all sampling locations ranged from 264.7 to 1973 ng g-1 lipid weight (lw), while all the paired DAP metabolites were detected in the total range from 35.3 to 510 ng g-1 lw. The calculated log bioconcentration factors (BCFs) of PFRs in whole fish were correlated with their log KOW (P < 0.05). The metabolite/parent ratios (MPRs) of ΣDAPs were calculated and ranged from 0.10 to 1.12 in whole-fish of all species. The MPRs of BBOEP/TBOEP were the highest. With respect to their distribution in different tissues, both the parent PFRs and metabolites were found at relatively higher levels in the liver than in other tissues (muscle, intestine, kidney and ovary), which was markedly different from those observed in avian species in previous studies. The accumulation of PFRs and DAPs in various tissues was not significantly correlated with the lipid content. The highest PFRs level in the liver may be related to the active hepatic accumulation processes. Meanwhile, the MPRs for all 4 pairs were the highest in the kidney relative to the other tissues. To the best of our knowledge, this is first study of DAPs in wild animals, and our study may improve the understanding of the accumulation and metabolism of PFRs in the body.
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Affiliation(s)
- Rui Hou
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Cao Liu
- Beijing Water Sciences Technology Institute, Beijing 100085, China
| | - Xiaozhong Gao
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yiping Xu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Jinmiao Zha
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zijian Wang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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712
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He MJ, Yang T, Yang ZH, Li Q, Wei SQ. Occurrence and Distribution of Organophosphate Esters in Surface Soil and Street Dust from Chongqing, China: Implications for Human Exposure. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2017; 73:349-361. [PMID: 28689326 DOI: 10.1007/s00244-017-0432-7] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 06/30/2017] [Indexed: 06/07/2023]
Abstract
In the present study, the occurrence, concentrations, and distribution of organophosphate esters (OPEs) were studied in surface soil and street dust samples collected from different sites of Chongqing, a metropolitan city in western China. Furthermore, nondietary daily intakes (DIs) of OPEs only through dust ingestion absorption were assessed between toddlers and adults. The ∑OPEs contents ranged from 10.1 to 315 ng/g dw and from 348 to 1369 ng/g dw in surface soil and street dust samples, respectively, with tris (2-butoxyethyl) phosphate (TBOEP), the predominant OPEs in surface soil, whereas tris (chloroethyl) phosphate (TCEP) occupied a relatively high proportion in street dust samples. The mobility of TCEP and tris (2-chloroisopropyl) phosphate (TCIPP) to deeper soil zones with seepage water may play a role in decreasing contents of both compounds in surface soil. Considerably different patterns of pairwise correlations of six OPEs congeners were observed between surface soil and street dust, which could largely relate to the complicated environmental process for tris (1,3-dichloroisopropyl) phosphate (TDCIPP) and TCIPP in surface soil. Analogous sources between surface soil and street dust have been identified through principal component analysis. Compared with adults, the toddlers were more vulnerable to OPEs intake, according to the estimated DI values. For both toddler and adult groups, the estimated exposure values for all OPEs were several orders of magnitude lower than the reference dose (RfD), not suggesting the potential risk to human health.
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Affiliation(s)
- Ming-Jing He
- College of Resources and Environment Science, Southwest University, Chongqing, 400716, China.
- Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400716, China.
| | - Ting Yang
- College of Resources and Environment Science, Southwest University, Chongqing, 400716, China
| | - Zhi-Hao Yang
- College of Resources and Environment Science, Southwest University, Chongqing, 400716, China
| | - Qi Li
- College of Resources and Environment Science, Southwest University, Chongqing, 400716, China
| | - Shi-Qiang Wei
- College of Resources and Environment Science, Southwest University, Chongqing, 400716, China
- Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400716, China
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713
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Been F, Bastiaensen M, Lai FY, van Nuijs ALN, Covaci A. Liquid Chromatography-Tandem Mass Spectrometry Analysis of Biomarkers of Exposure to Phosphorus Flame Retardants in Wastewater to Monitor Community-Wide Exposure. Anal Chem 2017; 89:10045-10053. [PMID: 28836434 DOI: 10.1021/acs.analchem.7b02705] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Phosphorus flame retardants and plasticizers (PFRs) are increasingly used in consumer goods, from which they can leach and pose potential threats to human health. Monitoring human exposure to these compounds is thus highly relevant. Current assessment of exposure through analysis of biological matrices is, however, tedious as well as logistically and financially demanding. Analysis of selected biomarkers of exposure to PFRs in wastewater could be a simple and complementary approach to monitoring, over space and time, exposure at the population level. An analytical procedure, based on solid-phase extraction (SPE) and liquid chromatography coupled to tandem mass spectrometry, was developed and validated to monitor the occurrence in wastewater of human exposure biomarkers of 2-ethylhexyldiphenyl phosphate (EHDPHP), tris(2-butoxyethyl) phosphate (TBOEP), triphenyl phosphate (TPHP), tris(2-chloroisopropyl) phosphate (TCIPP), and tris(2-chloroethyl) phosphate (TCEP). Various SPE sorbents and extraction protocols were evaluated, and for the optimized method, absolute extraction recoveries ranged between 46% and 100%. Accuracy and precision were satisfactory for the selected compounds. Method detection limits ranged from 1.6 to 19 ng L-1. Biomarkers of exposure to PFRs were measured for the first time in influent wastewater. Concentrations in samples collected in Belgium ranged from below the limit of quantitation to 1072 ng L-1, with 2-ethylhexyl phenyl phosphate (EHPHP) and TCEP being the most abundant. Per capita loads of target biomarkers varied greatly, suggesting potential differences in exposure between the investigated communities. The developed method allowed implementation of the concepts of human biomonitoring at the community scale, opening the possibility to assess population-wide exposure to PFRs.
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Affiliation(s)
- Frederic Been
- Toxicological Centre, University of Antwerp , Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Michiel Bastiaensen
- Toxicological Centre, University of Antwerp , Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Foon Yin Lai
- Toxicological Centre, University of Antwerp , Universiteitsplein 1, 2610 Wilrijk, Belgium
| | | | - Adrian Covaci
- Toxicological Centre, University of Antwerp , Universiteitsplein 1, 2610 Wilrijk, Belgium
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714
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Liu J, Xia S, Lü X, Shen H. Adsorption of tricresyl phosphate onto graphene nanomaterials from aqueous solution. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 76:1565-1573. [PMID: 28953482 DOI: 10.2166/wst.2017.317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Phosphorus flame retardant tricresyl phosphate (TCP) adsorption on graphene nanomaterials from aqueous solutions was explored using batch and column modes. Comparative studies were performed regarding the kinetics and equilibrium of TCP adsorption on graphene oxide (GO) and graphene (G) in batch mode. The adsorption kinetics exhibited a rapid TCP uptake, and experimental data were well described by the pseudo-second-order kinetic model. Adsorption isotherm data of TCP on the two adsorbents displayed an improved TCP removal performance with increasing temperature at pH 5, while experimental data were well described by the Langmuir isotherm model with a maximum adsorption capacity of 87.7 mg·g-1 for G, and 30.7 mg·g-1 for GO) at 303 K. The thermodynamic parameters show that the adsorption reaction is a spontaneous and endothermic process. In addition, dynamic adsorption of TCP in a fixed G column confirmed a faster approach to breakthrough at high flow rate, high influent TCP concentration, and low filling height of adsorbent. Breakthrough data were successfully described by the Thomas and Yoon-Nelson models.
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Affiliation(s)
- Jun Liu
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China E-mail:
| | - Siying Xia
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China E-mail:
| | - Xiaomeng Lü
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Hongxiang Shen
- Shanghai Aerospace Control Technology Institute, Shanghai 200233, China
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715
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Li L, Jiang S, Li K, Lin B, Wang Z, Zhang Z, Fang Y. Assessment of tris (1, 3-dichloro-2-propyl) phosphate toxicology in PC12 cells by using digital gene expression profiling. CHEMOSPHERE 2017; 183:353-360. [PMID: 28554019 DOI: 10.1016/j.chemosphere.2017.05.108] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 05/12/2017] [Accepted: 05/18/2017] [Indexed: 06/07/2023]
Abstract
Tris (1,3-dichloro-2-propyl) phosphate (TDCIPP), one of the most universally used organophosphate flame retardants (OPFRs), is an environmental pollutant. However, limited information is available regarding its toxicity and environmental health risk. In the present study, PC12 cells provided a useful model for the evaluation of the toxic effects of TDCIPP. Exposure to 7.5, 15, 30, or 60 μM TDCIPP for 72 h inhibited cell viability, and enhanced cellular apoptosis and oxidative stress. To further explore the underlying mechanisms, digital gene expression (DGE) technology was used to identify early transcriptional changes following TDCIPP exposure. Expression of the transcripts of 161 genes was significantly altered upon treatment with TDCIPP. Functional and pathway analysis of the transcriptional profile demonstrated that genes showing significant TDCIPP-associated changes in expression were involved in the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway, extracellular matrix-receptor interactions, protein digestion and absorption, and microRNAs in cancer. Using quantitative real-time PCR, we validated the differential expression of selected genes. These results showed that the expression profiles of cells exposed to 60 μM TDCIPP were consistent with the DGE data. Furthermore, western blotting showed that treatment with TDCIPP reduced the Bcl-2/Bax ratio and attenuated PI3K/Akt/Myc signaling. Taken together, these data suggest that TDCIPP exposure can reduce cell viability and induce apoptosis in PC12 cells by inhibiting activation of the PI3K/Akt/Myc signaling pathway. These observations provide valuable preliminary information regarding the mechanisms of TDCIPP-induced toxicity in PC12 cells and indicate that further study of the toxicity of other environmental OPFRs is warranted.
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Affiliation(s)
- Li Li
- Tianjin Institute of Health and Environmental Medicine, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin 300050, China
| | - Shuai Jiang
- Department of Biotechnology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Kang Li
- Tianjin Institute of Health and Environmental Medicine, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin 300050, China
| | - Bencheng Lin
- Tianjin Institute of Health and Environmental Medicine, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin 300050, China
| | - Ziyu Wang
- Tianjin Institute of Health and Environmental Medicine, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin 300050, China
| | - Zhiqing Zhang
- Tianjin Institute of Health and Environmental Medicine, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin 300050, China
| | - Yanjun Fang
- Tianjin Institute of Health and Environmental Medicine, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin 300050, China.
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716
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Vykoukalová M, Venier M, Vojta Š, Melymuk L, Bečanová J, Romanak K, Prokeš R, Okeme JO, Saini A, Diamond ML, Klánová J. Organophosphate esters flame retardants in the indoor environment. ENVIRONMENT INTERNATIONAL 2017; 106:97-104. [PMID: 28624751 DOI: 10.1016/j.envint.2017.05.020] [Citation(s) in RCA: 123] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 05/23/2017] [Accepted: 05/25/2017] [Indexed: 05/22/2023]
Abstract
Concentrations of 13 organophosphate ester flame retardants (OPEs) were measured in air, dust and window wipes from 63 homes in Canada, the Czech Republic and the United States in the spring and summer of 2013 to look for abundances, differences among regions, and partitioning behavior. In general, we observed the highest concentrations for halogenated OPEs, particularly TCEP, TCIPP and TDCIPP, and also non-halogenated TPHP. Differences between regions strongly depended on the matrix. The concentrations of OPEs in dust were significantly higher in the US than in Canada (CAN) and Czech Republic (CZ). CZ had the highest concentrations in window film and CAN in air. ΣOPE concentrations were 2-3 and 1-2 orders of magnitude greater than ΣBFRs in air, and dust and window films, respectively. We found a significant relationship between the concentrations in dust and air, and between the concentrations in window film and air for OPEs with log KOA values <12, suggesting that equilibrium was reached for these compounds but not for those with log KOA>12. This hypothesis was confirmed by a large discrepancy between values predicted using a partitioning model and the measured values for OPEs with log KOA values >12.
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Affiliation(s)
- Martina Vykoukalová
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic
| | - Marta Venier
- School of Public and Environmental Affairs, Indiana University, 702 N. Walnut Grove Ave., Bloomington, 47405 Indiana, USA.
| | - Šimon Vojta
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic
| | - Lisa Melymuk
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic
| | - Jitka Bečanová
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic
| | - Kevin Romanak
- School of Public and Environmental Affairs, Indiana University, 702 N. Walnut Grove Ave., Bloomington, 47405 Indiana, USA
| | - Roman Prokeš
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic
| | - Joseph O Okeme
- Department of Physical & Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Amandeep Saini
- Department of Physical & Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Miriam L Diamond
- Department of Earth Sciences, University of Toronto, 22 Russell Street, Toronto, Ontario M5S 3B1, Canada; Department of Physical & Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Jana Klánová
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 753/5, pavilion A29, 625 00 Brno, Czech Republic
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717
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Polyionic complexes of butyrylcholinesterase and poly-l-lysine-g-poly(ethylene glycol): Comparative kinetics of catalysis and inhibition and in vitro inactivation by proteases and heat. Chem Biol Interact 2017; 275:86-94. [DOI: 10.1016/j.cbi.2017.07.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 06/27/2017] [Accepted: 07/25/2017] [Indexed: 01/11/2023]
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718
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Zhong M, Tang J, Mi L, Li F, Wang R, Huang G, Wu H. Occurrence and spatial distribution of organophosphorus flame retardants and plasticizers in the Bohai and Yellow Seas, China. MARINE POLLUTION BULLETIN 2017. [PMID: 28633947 DOI: 10.1016/j.marpolbul.2017.06.034] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Seawater samples from 50 sites in the BS and YS were collected to investigate the spatial distribution of 7 OPs. Concentrations of the total OPs (ƩOPs) in the BS and YS ranged from 8.12ngL-1 to 98.04ngL-1 with a geometric mean (GM) of 23.70ngL-1. Tris(1-chloro-2-propyl) phosphate (TCPP) was the dominant compound, followed by tris(2-chloroethyl) phosphate (TCEP) and triphenylphosphine oxide (TPPO). The ƩOPs together with the most commonly detected individual OPs (TCPP, TCEP, tris(1,3-dichloro-2-propyl) phosphate (TDCPP), tri-iso-butyl phosphate (TiBP), triphenyl phosphate (TPhP), and TPPO) tended to decrease from nearshore to offshore and from the surface to the bottom seawaters, indicating major land-based sources. Furthermore, the Yellow Sea Cold Water Mass (YSCWM), Changjiang Diluted Water (CDW), Taiwan Warm Current (TaWC), and Subei Coastal Water (SCW) influenced the horizontal and vertical distributions of the OPs in the study area.
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Affiliation(s)
- Mingyu Zhong
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences, Yantai 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianhui Tang
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences, Yantai 264003, China; Shandong Provincial Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai 264003, China.
| | - Lijie Mi
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences, Yantai 264003, China
| | - Fei Li
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences, Yantai 264003, China
| | - Runmei Wang
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences, Yantai 264003, China; Shandong Provincial Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai 264003, China
| | - Guopei Huang
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences, Yantai 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huifeng Wu
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences, Yantai 264003, China; Shandong Provincial Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai 264003, China.
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719
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Hu YX, Sun YX, Li X, Xu WH, Zhang Y, Luo XJ, Dai SH, Xu XR, Mai BX. Organophosphorus flame retardants in mangrove sediments from the Pearl River Estuary, South China. CHEMOSPHERE 2017; 181:433-439. [PMID: 28458218 DOI: 10.1016/j.chemosphere.2017.04.117] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/20/2017] [Accepted: 04/23/2017] [Indexed: 06/07/2023]
Abstract
Forty-eight surface sediments were collected from three mangrove wetlands in the Pearl River Estuary (PRE) of South China to investigate the distribution of organophosphorus flame retardants (OPFRs) and the relationship between OPFRs and microbial community structure determined by phospholipid fatty acid. Concentrations of ΣOPFRs in mangrove sediments of the PRE ranged from 13.2 to 377.1 ng g-1 dry weight. Levels of ΣOPFRs in mangrove sediments from Shenzhen and Guangzhou were significantly higher than those from Zhuhai, indicating that OPFRs were linked to industrialization and urbanization. Tris(chloropropyl)phosphate was the predominant profile of OPFRs in mangrove sediments from Shenzhen (38.9%) and Guangzhou (35.0%), while the composition profile of OPFRs in mangrove sediments from Zhuhai was dominated by tris(2-chloroethyl) phosphate (25.5%). The mass inventories of OPFRs in the mangrove sediments of Guangzhou, Zhuhai and Shenzhen were 439.5, 133.5 and 662.3 ng cm-2, respectively. Redundancy analysis revealed that OPFRs induced a shift in the structure of mangrove sediment microbial community and the variations were significantly correlated with tris(1,3-dichloro-2-propyl)phosphate and tris(2-butoxyethyl) phosphate.
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Affiliation(s)
- Yong-Xia Hu
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yu-Xin Sun
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
| | - Xiao Li
- Department of Scientific Research, Shenzhen Institute of Information Technology, Shenzhen 518172, China
| | - Wei-Hai Xu
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Ying Zhang
- Scientific Institute of Pearl River Water Resources Protection, Guangzhou 510611, China
| | - Xiao-Jun Luo
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Shou-Hui Dai
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Xiang-Rong Xu
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
| | - Bi-Xian Mai
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
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720
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Chu S, Baker MR, Leong G, Letcher RJ, Gee SJ, Hammock BD, Li QX. Exploring adduct formation between human serum albumin and eleven organophosphate ester flame retardants and plasticizers using MALDI-TOF/TOF and LC-Q/TOF. CHEMOSPHERE 2017; 180:169-177. [PMID: 28407546 PMCID: PMC5494263 DOI: 10.1016/j.chemosphere.2017.03.124] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 03/08/2017] [Accepted: 03/28/2017] [Indexed: 05/09/2023]
Abstract
Organophosphate (OP) and organophosphate ester (OPE) adducts of albumin are valuable biomarkers for retrospective verification of exposure. In the present study, our goal was to determine whether OPE flame retardants (OPE FRs) and OPE plasticizers can covalently bind to human serum albumin (HSA), which would allow the resulting adducts to be used to evaluate exposure. Eleven OPE FRs and plasticizers were examined in a HSA-adduct in vitro assay. Pure HSA was incubated with the target OPEs, as well as with an OP insecticide (profenofos) positive control. After enzymatic cleavage with pepsin or Glu-C, the digested albumin was analyzed by matrix-assisted laser desorption ionization tandem time-of-flight mass spectrometry (MALDI-TOF/TOF-MS) and liquid chromatography-quadrupole time-of-flight mass spectrometry (LC-Q-ToF-MS). Under optimized HSA assay conditions, tyrosine adducts were formed at Y411 and Y148/Y150 with a characteristic mass shift for phosphorylation (Δm/z 166) for the profenofos positive control. However, no such phosphorylated peptides were detected for the 11 target OPEs. This negative result suggests that these OPEs have very different affinities from the OP insecticide. They are less reactive or they may specifically interact with other proteins.
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Affiliation(s)
- Shaogang Chu
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, 1955 East West Road, Honolulu, HI, 96822, USA; Ecotoxicology and Wildlife Health Division, Wildlife and Landscape Science Directorate, Science and Technology Branch, National Wildlife Research Centre, Environment and Climate Change Canada, 1125 Colonel Bay Dr., Ottawa, ON, K1A 0H3, Canada
| | - Margaret R Baker
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, 1955 East West Road, Honolulu, HI, 96822, USA
| | - Gladys Leong
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, 1955 East West Road, Honolulu, HI, 96822, USA
| | - Robert J Letcher
- Ecotoxicology and Wildlife Health Division, Wildlife and Landscape Science Directorate, Science and Technology Branch, National Wildlife Research Centre, Environment and Climate Change Canada, 1125 Colonel Bay Dr., Ottawa, ON, K1A 0H3, Canada
| | - Shirley J Gee
- Department of Entomology and Nematology, University of California at Davis, One Shields Avenue, Davis, CA, 95616-858, USA
| | - Bruce D Hammock
- Department of Entomology and Nematology, University of California at Davis, One Shields Avenue, Davis, CA, 95616-858, USA
| | - Qing X Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, 1955 East West Road, Honolulu, HI, 96822, USA.
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721
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Kim UJ, Oh JK, Kannan K. Occurrence, Removal, and Environmental Emission of Organophosphate Flame Retardants/Plasticizers in a Wastewater Treatment Plant in New York State. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:7872-7880. [PMID: 28605181 DOI: 10.1021/acs.est.7b02035] [Citation(s) in RCA: 162] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The occurrence and fate of 14 triester organophosphate flame retardants (OPFRs) and plasticizers and their two diester metabolites were investigated in a wastewater treatment plant (WWTP) in the Albany area of New York State. All target OPFRs were found in wastewater, with average concentrations that ranged from 20.1 ng/L for tris(methylphenyl) phosphate (TMPP) to 30 100 ng/L for tris(2-butoxyethyl)phosphate (TBOEP) in influents and from 7.68 ng/L for TMPP to 12 600 ng/L for TBOEP in final effluents. TBOEP was the dominant compound in influents (max: 69 500 ng/L) followed in decreasing order by tris(1-chloro-2-propyl)phosphate (TCIPP; max: 14 500 ng/L), bis(1,3-dichloro-2-propyl)phosphate (BDCIPP; max: 4550 ng/L), tris(1,3-dichloro-2-propyl)phosphate (TDCIPP; max: 3150 ng/L) and tris(2-chloroethyl)phosphate (TCEP; max: 8450 ng/L). The fraction of TMPP sorbed to suspended particulate matter (SPM) was 56.4% of the total mass in wastewater, which was the highest among the target chemicals analyzed. The average concentrations of OPFRs in sludge were between 4.14 ng/g dw for tripropyl phosphate (TPP) and 7290 ng/g dw for TBOEP; for ash, they were between 2.17 ng/g dw for TMPP and 427 ng/g dw for triphenyl phosphate (TPhP). The mass loadings of OPFRs into the WWTP ranged from 0.02 mg/day/person for TPP to 28.7 mg/day/person for TBOEP, whereas the emission from the WWTP ranged from 0.01 mg/day/person for 2-ethylhexyl diphenyl phosphate (EHDPP) to 5.12 mg/day/person for TCIPP. The removal efficiencies for OPFRs were slightly above 60% for TMPP, TBOEP, and tris(2-ethylhexyl)phosphate (TEHP) whereas those for other OPFRs were <40% (TPhP and BDCIPP) to negative values, suggesting incomplete removal in WWTPs.
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Affiliation(s)
- Un-Jung Kim
- Wadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany , Empire State Plaza, P.O. Box 509, Albany, New York 12201-0509, United States
| | - Jung Keun Oh
- Wadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany , Empire State Plaza, P.O. Box 509, Albany, New York 12201-0509, United States
| | - Kurunthachalam Kannan
- Wadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany , Empire State Plaza, P.O. Box 509, Albany, New York 12201-0509, United States
- Biochemistry Department, Faculty of Science and Experimental Biochemistry Unit, King Fahd Medical Research Center, King Abdulaziz University , Jeddah 21589, Saudi Arabia
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722
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Wang G, Chen H, Du Z, Li J, Wang Z, Gao S. In vivo metabolism of organophosphate flame retardants and distribution of their main metabolites in adult zebrafish. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 590-591:50-59. [PMID: 28292737 DOI: 10.1016/j.scitotenv.2017.03.038] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 02/27/2017] [Accepted: 03/05/2017] [Indexed: 06/06/2023]
Abstract
Understanding the metabolism of chemicals as well as the distribution and depuration of their main metabolites in tissues are essential for evaluating their fate and potential toxicity in vivo. Herein, we investigated the metabolism of six typical organophosphate (OP) flame retardants (tripropyl phosphate (TPRP), tri-n-butyl phosphate (TNBP), tris(2-butoxyethyl) phosphate (TBOEP), tris(2-chloroethyl) phosphate (TCEP), tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) and tri-p-cresyl phosphate (p-TCP)) in adult zebrafish in laboratory at three levels (0, 1/150 LC50 (environmentally relevant level), and 1/30 LC50 per OP analog). Twenty main metabolites were detected in the liver of OPs-exposed zebrafish using high resolution mass spectrometry (Q-TOF). The reaction pathways involving scission of the ester bond (hydrolysis), cleavage of the ether bond, oxidative hydroxylation, dechlorination, and coupling with glucuronic acid were proposed, and were further confirmed by the frontier electron density and point charge calculations. Tissue distribution of the twenty metabolites revealed that liver and intestine with the highest levels of metabolites were the most active organs for OPs biotransformation among the studied tissues of intestine, liver, roe, brain, muscle, and gill, which showed the importance of hepatobiliary system (liver-bile-intestine) in the metabolism and excretion of OPs in zebrafish. Fast depuration of metabolites from tissues indicated that the formed metabolites might be not persistent in fish, and easily released into water. This study provides comprehensive information on the metabolism of OPs in the tissue of zebrafish, which might give some hints for the exploration of their toxic mechanism in aquatic life.
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Affiliation(s)
- Guowei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China
| | - Hanyan Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China
| | - Zhongkun Du
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China
| | - Jianhua Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China
| | - Shixiang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China.
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723
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Li J, Xie Z, Mi W, Lai S, Tian C, Emeis KC, Ebinghaus R. Organophosphate Esters in Air, Snow, and Seawater in the North Atlantic and the Arctic. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:6887-6896. [PMID: 28537717 DOI: 10.1021/acs.est.7b01289] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The concentrations of eight organophosphate esters (OPEs) have been investigated in air, snow and seawater samples collected during the cruise of ARK-XXVIII/2 from sixth June to third July 2014 across the North Atlantic and the Arctic. The sum of gaseous and particle concentrations (ΣOPE) ranged from 35 to 343 pg/m3. The three chlorinated OPEs accounted for 88 ± 5% of the ΣOPE. The most abundant OPE was tris(2-chloroethyl) phosphate (TCEP), with concentrations ranging from 30 to 227 pg/m3, followed by three major OPEs, such as tris(1-chloro-2-propyl) phosphate (TCPP, 0.8 to 82 pg/m3), tri-n-butyl phosphate (TnBP, 2 to 19 pg/m3), and tri-iso-butyl phosphate (TiBP, 0.3 to 14 pg/m3). The ΣOPE concentrations in snow and seawater ranged from 4356 to 10561 pg/L and from 348 to 8396 pg/L, respectively. The atmospheric particle-bound dry depositions of TCEP ranged from 2 to 12 ng/m2/day. The air-seawater gas exchange fluxes were dominated by net volatilization from seawater to air for TCEP (mean, 146 ± 239 ng/m2/day), TCPP (mean, 1670 ± 3031 ng/m2/day), TiBP (mean, 537 ± 581 ng/m2/day) and TnBP (mean, 230 ± 254 ng/m2/day). This study highlighted that OPEs are subject to long-range transport via both air and seawater from the European continent and seas to the North Atlantic and the Arctic.
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Affiliation(s)
- Jing Li
- Helmholtz-Zentrum Geesthacht, Centre for Materials and Coastal Research, Institute of Coastal Research , Geesthacht, 21502, Germany
- University of Hamburg , School of Integrated Climate System Sciences, Hamburg, 20144, Germany
| | - Zhiyong Xie
- Helmholtz-Zentrum Geesthacht, Centre for Materials and Coastal Research, Institute of Coastal Research , Geesthacht, 21502, Germany
| | - Wenying Mi
- MINJIE Analytical Laboratory , Geesthacht, 21502, Germany
| | - Senchao Lai
- Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, School of Environment and Energy, South China University of Technology , Guangzhou, 510006, China
| | - Chongguo Tian
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, CAS , Yantai, 264003, China
| | - Kay-Christian Emeis
- Helmholtz-Zentrum Geesthacht, Centre for Materials and Coastal Research, Institute of Coastal Research , Geesthacht, 21502, Germany
- University of Hamburg , School of Integrated Climate System Sciences, Hamburg, 20144, Germany
| | - Ralf Ebinghaus
- Helmholtz-Zentrum Geesthacht, Centre for Materials and Coastal Research, Institute of Coastal Research , Geesthacht, 21502, Germany
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724
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Yang X, Li X, Zhang L, Gong J. Electrospun template directed molecularly imprinted nanofibers incorporated with BiOI nanoflake arrays as photoactive electrode for photoelectrochemical detection of triphenyl phosphate. Biosens Bioelectron 2017; 92:61-67. [DOI: 10.1016/j.bios.2017.01.056] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 01/12/2017] [Accepted: 01/25/2017] [Indexed: 12/11/2022]
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725
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Li C, Li L, Lin B, Fang Y, Yang H, Liu H, Xi Z. Tris (1,3-dichloro-2-propyl) phosphate induces toxicity by stimulating CaMK2 in PC12 cells. ENVIRONMENTAL TOXICOLOGY 2017; 32:1784-1791. [PMID: 28181390 DOI: 10.1002/tox.22401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Revised: 01/14/2017] [Accepted: 01/15/2017] [Indexed: 06/06/2023]
Abstract
Tris (1,3-dichloro-2-propyl) phosphate (TDCIPP) is one of the widely used organophosphorus flame retardants (OPFRs), which are regarded as suitable substitutes for brominated flame retardants (BFRs). Previously, we have validated the toxicity of TDCIPP in PC12 cells owing to the induced alterations in GAP43, NF-H, CaMK2a/2b, and tubulin α/β proteins; however, limited information is currently available on the toxicity and mechanism of TDCIPP. In the present study, cytotoxicity effects were evaluated by exposing PC12 cells to different concentrations of TDCIPP (0-50 μM) for 4 days. To explore the possible mechanisms through which cytotoxicity is induced, changes in intracellular [Ca2+ ]i levels and the activation of calmodulin dependent protein kinase 2 (CaMK2), c-Jun N-terminal kinase (JNK), extracellular regulated protein kinases (ERK1/2), and p38 mitogen-activated protein kinases (MAPK) pathways were evaluated. Furthermore, PC12 cells were pretreated with CaMK2 inhibitor KN93 to investigate the relationship between TDCIPP-induced phosphorylation of CaMK2 and activation of JNK, ERK1/2, and p38 MAPK pathways. Our results indicate that TDCIPP-induced toxicity might be associated with the overload of [Ca2+ ]i levels, increased phosphorylation of CaMK2, and activation of the JNK, ERK1/2, and p38 MAPK pathways, the lattermost of which was further demonstrated to be partially elicited by the CaMK2 phosphorylation.
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Affiliation(s)
- Chaonan Li
- Department of Toxicology, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, China
- Department of Chronic Disease Prevention and Treatment, Mentougou Center for Disease Prevention and Control, Beijing, China
| | - Li Li
- Department of Toxicology, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, China
| | - Bencheng Lin
- Department of Toxicology, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, China
| | - Yanjun Fang
- Department of Toxicology, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, China
| | - Honglian Yang
- Department of Toxicology, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, China
| | - Huanliang Liu
- Department of Toxicology, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, China
| | - Zhuge Xi
- Department of Toxicology, A Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin, China
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726
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Li C, Chen J, Xie HB, Zhao Y, Xia D, Xu T, Li X, Qiao X. Effects of Atmospheric Water on ·OH-initiated Oxidation of Organophosphate Flame Retardants: A DFT Investigation on TCPP. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:5043-5051. [PMID: 28368609 DOI: 10.1021/acs.est.7b00347] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Tris(2-chloroisopropyl) phosphate (TCPP), a widely used organophosphate flame retardant, has been recognized as an important atmospheric pollutant. It is notable that TCPP has potential for long-range atmospheric transport. However, its atmospheric fate is unknown, restricting its environmental risk assessment. Herein we performed quantum chemical calculations to investigate the atmospheric transformation mechanisms and kinetics of TCPP initiated by ·OH in the presence of O2/NO/NO2, and the effects of ubiquitous water on these reactions. Results show the H-abstraction pathways are the most favorable for the titled reaction. The calculated gaseous rate constant and lifetime at 298 K are 1.7 × 10-10 cm3molecule-1 s-1 and 1.7 h, respectively. However, when considering atmospheric water, the corresponding lifetime is about 0.5-20.2 days. This study reveals for the first time that water has a negative role in the ·OH-initiated degradation of TCPP by modifying the stabilities of prereactive complexes and transition states via forming hydrogen bonds, which unveils one underlying mechanism for the observed persistence of TCPP in the atmosphere. Water also influences secondary reaction pathways of selected TCPP radicals formed from the primary H-abstraction. These results demonstrate the importance of water in the evaluation of the atmospheric fate of newly synthesized chemicals and emerging pollutants.
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Affiliation(s)
- Chao Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology , Dalian 116024, China
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University , Changchun 130117, 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
| | - Hong-Bin Xie
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology , Dalian 116024, China
| | - Yuanhui Zhao
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University , Changchun 130117, China
| | - Deming Xia
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology , Dalian 116024, China
| | - Tong Xu
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology , Dalian 116024, China
| | - Xuehua Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology , Dalian 116024, China
| | - Xianliang Qiao
- 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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727
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Liagkouridis I, Cequier E, Lazarov B, Palm Cousins A, Thomsen C, Stranger M, Cousins IT. Relationships between estimated flame retardant emissions and levels in indoor air and house dust. INDOOR AIR 2017; 27:650-657. [PMID: 27614110 DOI: 10.1111/ina.12332] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 08/31/2016] [Indexed: 06/06/2023]
Abstract
A significant number of consumer goods and building materials can act as emission sources of flame retardants (FRs) in the indoor environment. We investigate the relationship between the emission source strength and the levels of 19 brominated flame retardants (BFRs) and seven organophosphate flame retardants (OPFRs) in air and dust collected in 38 indoor microenvironments in Norway. We use modeling methods to back-calculate emission rates from indoor air and dust measurements and identify possible indications of an emission-to-dust pathway. Experimentally based emission estimates provide a satisfactory indication of the relative emission strength of indoor sources. Modeling results indicate an up to two orders of magnitude enhanced emission strength for OPFRs (median emission rates of 0.083 and 0.41 μg h-1 for air-based and dust-based estimates) compared to BFRs (0.52 and 0.37 ng h-1 median emission rates). A consistent emission-to-dust signal, defined as higher dust-based than air-based emission estimates, was identified for four of the seven OPFRs, but only for one of the 19 BFRs. It is concluded, however, that uncertainty in model input parameters could potentially lead to the false identification of an emission-to-dust signal.
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Affiliation(s)
- I Liagkouridis
- Department of Environmental Science and Analytical Chemistry (ACES), Stockholm University, Stockholm, Sweden
| | - E Cequier
- Department of Exposure and Risk Assessment, Norwegian Institute of Public Health, Nydalen, Oslo, Norway
| | - B Lazarov
- Environmental Risk and Health Unit, VITO, Mol, Belgium
| | - A Palm Cousins
- IVL Swedish Environmental Research Institute, Stockholm, Sweden
| | - C Thomsen
- Department of Exposure and Risk Assessment, Norwegian Institute of Public Health, Nydalen, Oslo, Norway
| | - M Stranger
- Environmental Risk and Health Unit, VITO, Mol, Belgium
| | - I T Cousins
- Department of Environmental Science and Analytical Chemistry (ACES), Stockholm University, Stockholm, Sweden
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728
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Cui K, Wen J, Zeng F, Li S, Zhou X, Zeng Z. Occurrence and distribution of organophosphate esters in urban soils of the subtropical city, Guangzhou, China. CHEMOSPHERE 2017; 175:514-520. [PMID: 28254716 DOI: 10.1016/j.chemosphere.2017.02.070] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 02/08/2017] [Accepted: 02/12/2017] [Indexed: 06/06/2023]
Abstract
67 soil samples from the road greenbelts, the paddy/vegetable fields, the parks, the commercial and residential areas in the subtropical city, Guangzhou, China, were collected and analyzed for 11 organophosphate esters (OPEs) and triphenylphosphine oxide (TPPO). OPEs were detected in all soil samples analyzed, which indicate that OPEs are ubiquitous environmental contaminants. The ∑11OPEs concentrations ranged from 0.041 mg kg-1-dry weight (dw) to 1.37 mg kg-1-dw, with the mean and median concentrations of 0.25 mg kg-1-dw and 0.24 mg kg-1-dw, respectively. High concentrations of OPEs were observed in the roadside soils collected from the commercial areas with heavy traffic and extensive anthropogenic activities. Of 11 OPEs, tris(2-butoxyethyl) phosphate (TBOEP), tri-cresyl-phosphate (TMPP), tributyl phosphate (TNBP) and tris(2-chloroethyl) phosphate (TCEP) were the most abundant OPEs, contributing 42.8 ± 15.4%, 17.2 ± 11.9%, 10.9 ± 6.85% and 9.70 ± 9.56% of ∑11OPEs, respectively. Principal component analysis (PCA) suggested that OPEs accumulation in the urban soils derived from different sources. As compared to the results for other studies, the urban soils of Guangzhou were moderately polluted by OPEs.
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Affiliation(s)
- Kunyan Cui
- School of Chemistry, Sun Yat-sen University, Guangdong, Guangzhou 510275, China; Instrumental Analysis and Research Center, Sun Yat-sen University, Guangdong, Guangzhou 510275, China
| | - Jiaxin Wen
- School of Chemistry, Sun Yat-sen University, Guangdong, Guangzhou 510275, China
| | - Feng Zeng
- School of Chemistry, Sun Yat-sen University, Guangdong, Guangzhou 510275, China.
| | - Shuocong Li
- School of Chemistry, Sun Yat-sen University, Guangdong, Guangzhou 510275, China
| | - Xi Zhou
- School of Chemistry, Sun Yat-sen University, Guangdong, Guangzhou 510275, China
| | - Zunxiang Zeng
- School of Chemistry, Sun Yat-sen University, Guangdong, Guangzhou 510275, China
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729
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Tung EWY, Ahmed S, Peshdary V, Atlas E. Firemaster® 550 and its components isopropylated triphenyl phosphate and triphenyl phosphate enhance adipogenesis and transcriptional activity of peroxisome proliferator activated receptor (Pparγ) on the adipocyte protein 2 (aP2) promoter. PLoS One 2017; 12:e0175855. [PMID: 28437481 PMCID: PMC5402942 DOI: 10.1371/journal.pone.0175855] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 03/31/2017] [Indexed: 01/10/2023] Open
Abstract
Firemaster® 550 (FM550) is a chemical mixture currently used as an additive flame retardant in commercial products, and is comprised of 2-ethylhexyl-2,3,4,5-tertrabromobenzoate (TBB), bis(2-ethylhexyl) tetrabromophthalate (TBPH), triphenyl phosphate (TPP), and isopropylated triphenyl phosphate (IPTP). Animal and in vitro studies suggest that FM550, TPP and IPTP may have adipogenic effects and may exert these effects through PPARγ activation. Using murine 3T3-L1 preadipocytes, we investigated the detailed expression of transcription factors and adipogenic markers in response to FM550 and its components. Further we investigated the mechanism of action of the peroxisome proliferator-activated receptor gamma (PPARγ) on downstream targets of the receptor by focussing on the mature adipocyte marker, adipocyte protein 2 (aP2). In addition, we set to elucidate the components responsible for the adipogenic effects seen in the FM550 mixture. We show that FM550 and its components TPP, IPTP, and TBPH, but not TBB induced lipid accumulation in a dose-dependent manner. Interestingly, despite displaying enhanced lipid accumulation, TBPH did not alter the mRNA or protein expression of terminal differentiation markers. In contrast, FM550, TPP, and IPTP treatment enhanced lipid accumulation, and mRNA and protein expression of terminal differentiation markers. To further delineate the mechanisms of action of FM550 and its components we focussed on aP2 promoter activity. For this purpose we used the enhancer region of the mouse aP2 promoter using a 584-bp reporter construct containing an active PPRE located 5.4 kb away from the transcription start site of aP2. Exposure to FM550, IPTP, and TPP significantly increased PPARγ mediated aP2 enhancer activity. Furthermore, we show that TPP- and IPTP-dependent upregulation of aP2 was significantly inhibited by the selective PPARγ antagonist GW9662. In addition, chromatin immunoprecipitation experiments showed that IPTP and TPP treatment led to the recruitment of PPARγ to the regulatory region of aP2.
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Affiliation(s)
- Emily W. Y. Tung
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, Canada
| | - Shaimaa Ahmed
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, Canada
| | - Vian Peshdary
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, Canada
| | - Ella Atlas
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, Canada
- * E-mail:
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730
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731
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Zhou L, Hiltscher M, Gruber D, Püttmann W. Organophosphate flame retardants (OPFRs) in indoor and outdoor air in the Rhine/Main area, Germany: comparison of concentrations and distribution profiles in different microenvironments. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:10992-11005. [PMID: 27230144 DOI: 10.1007/s11356-016-6902-z] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Accepted: 05/16/2016] [Indexed: 06/05/2023]
Abstract
The concentrations of 9 organophosphate flame retardants (OPFRs) were determined in 56 indoor and 9 outdoor air samples in the Rhine/Main area in Germany. The indoor samples were collected from seven different indoor microenvironments including private cars, private homes, floor/carpet stores, building material markets, schools, offices, and day care centers, while outdoor samples were simultaneously collected close to the indoor sampling locations. The total OPFR concentrations (∑OPFRs) in indoor air ranged from 3.30 to 751.0 ng/m3 with a median of 40.23 ng/m3, which was approximately eight times higher than those in outdoor air (median 5.38 ng/m3), indicating that sources of OPFRs predominate in the indoor environment. Tris(2-chloroisopropyl)phosphate (TCPP), tris(isobutyl)phosphate (TiBP), and tributyl phosphate (TnBP) were the dominating compounds both in indoor and outdoor air. The median concentration of ∑OPFRs in private cars (180.3 ng/m3) was significantly higher than that in private homes (12.51 ng/m3), schools (36.23 ng/m3), day care centers (31.80 ng/m3), and building material markets (31.17 ng/m3) (p < 0.05). Distribution profiles of OPFRs varied among different indoor microenvironments, which are evidenced by dominating indoor air concentrations of non-Cl-OPFRs in day care centers, floor/carpet stores, schools, and of Cl-OPFRs in other indoor microenvironments. Multivariate analyses revealed three distinct groups for OPFRs, i.e., TiBP/TnBP, TEP/TCEP/TDCPP, and TCPP, whose concentrations were closely associated with the distribution profiles and pollution characteristics of materials predominating in different indoor microenvironments.
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Affiliation(s)
- Lingli Zhou
- Department of Environmental Analytical Chemistry, Institute of Atmospheric and Environmental Sciences, J. W. Goethe-University Frankfurt am Main, Altenhöferallee 1, 60438, Frankfurt am Main, Germany
| | - Marco Hiltscher
- Department of Environmental Analytical Chemistry, Institute of Atmospheric and Environmental Sciences, J. W. Goethe-University Frankfurt am Main, Altenhöferallee 1, 60438, Frankfurt am Main, Germany
| | - Daniel Gruber
- Department of Environmental Analytical Chemistry, Institute of Atmospheric and Environmental Sciences, J. W. Goethe-University Frankfurt am Main, Altenhöferallee 1, 60438, Frankfurt am Main, Germany
| | - Wilhelm Püttmann
- Department of Environmental Analytical Chemistry, Institute of Atmospheric and Environmental Sciences, J. W. Goethe-University Frankfurt am Main, Altenhöferallee 1, 60438, Frankfurt am Main, Germany.
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732
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Hoffman K, Butt CM, Webster TF, Preston EV, Hammel SC, Makey C, Lorenzo AM, Cooper EM, Carignan C, Meeker JD, Hauser R, Soubry A, Murphy SK, Price TM, Hoyo C, Mendelsohn E, Congleton J, Daniels JL, Stapleton HM. Temporal Trends in Exposure to Organophosphate Flame Retardants in the United States. ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS 2017; 4:112-118. [PMID: 28317001 PMCID: PMC5352975 DOI: 10.1021/acs.estlett.6b00475] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 01/26/2017] [Accepted: 01/27/2017] [Indexed: 05/20/2023]
Abstract
During the past decade, use of organophosphate compounds as flame retardants and plasticizers has increased. Numerous studies investigating biomarkers (i.e., urinary metabolites) demonstrate ubiquitous human exposure and suggest that human exposure may be increasing. To formally assess temporal trends, we combined data from 14 U.S. epidemiologic studies for which our laboratory group previously assessed exposure to two commonly used organophosphate compounds, tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) and triphenyl phosphate (TPHP). Using individual-level data and samples collected between 2002 and 2015, we assessed temporal and seasonal trends in urinary bis(1,3-dichloro-2-propyl) phosphate (BDCIPP) and diphenyl phosphate (DPHP), the metabolites of TDCIPP and TPHP, respectively. Data suggest that BDCIPP concentrations have increased dramatically since 2002. Samples collected in 2014 and 2015 had BDCIPP concentrations that were more than 15 times higher than those collected in 2002 and 2003 (10β = 16.5; 95% confidence interval from 9.64 to 28.3). Our results also demonstrate significant increases in DPHP levels; however, increases were much smaller than for BDCIPP. Additionally, results suggest that exposure varies seasonally, with significantly higher levels of exposure in summer for both TDCIPP and TPHP. Given these increases, more research is needed to determine whether the levels of exposure experienced by the general population are related to adverse health outcomes.
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Affiliation(s)
- Kate Hoffman
- Nicholas
School of the Environment, Duke University, Durham, North Carolina 27708, United States
| | - Craig M. Butt
- Nicholas
School of the Environment, Duke University, Durham, North Carolina 27708, United States
| | - Thomas F. Webster
- Boston
University School of Public Heath, Boston, Massachusetts 02118, United States
| | - Emma V. Preston
- Boston
University School of Public Heath, Boston, Massachusetts 02118, United States
| | - Stephanie C. Hammel
- Nicholas
School of the Environment, Duke University, Durham, North Carolina 27708, United States
| | - Colleen Makey
- Boston
University School of Public Heath, Boston, Massachusetts 02118, United States
| | - Amelia M. Lorenzo
- Nicholas
School of the Environment, Duke University, Durham, North Carolina 27708, United States
| | - Ellen M. Cooper
- Nicholas
School of the Environment, Duke University, Durham, North Carolina 27708, United States
| | - Courtney Carignan
- Harvard
T. H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - John D. Meeker
- University
of Michigan School of Public Health, Ann Arbor, Michigan 48109, United States
| | - Russ Hauser
- Harvard
T. H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - Adelheid Soubry
- Epidemiology
Research Group, Department of Public Health and Primary Care, KU Leuven-University, B-3000 Leuven, Belgium
| | - Susan K. Murphy
- Department
of Obstetrics and Gynecology, Division of Gynecologic Oncology, Duke University Medical Center, Durham, North Carolina 27710, United States
- Department
of Obstetrics and Gynecology, Division of Reproductive Endocrinology, Duke University Medical Center, Durham, North Carolina 27710, United States
| | - Thomas M. Price
- Department
of Obstetrics and Gynecology, Division of Reproductive Endocrinology, Duke University Medical Center, Durham, North Carolina 27710, United States
| | - Cathrine Hoyo
- Department
of Biological Sciences, North Carolina State
University, Raleigh, North Carolina 27695, United States
| | - Emma Mendelsohn
- Nicholas
School of the Environment, Duke University, Durham, North Carolina 27708, United States
| | | | - Julie L. Daniels
- Department
of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Heather M. Stapleton
- Nicholas
School of the Environment, Duke University, Durham, North Carolina 27708, United States
- Nicholas School of the Environment,
Duke University, LSRC Box 90328, Durham, NC 27708. E-mail: . Phone: (919) 613-8717. Fax: (919) 684-8741
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733
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He C, Wang X, Thai P, Mueller JF, Gallen C, Li Y, Baduel C. Development and validation of a multi-residue method for the analysis of brominated and organophosphate flame retardants in indoor dust. Talanta 2017; 164:503-510. [DOI: 10.1016/j.talanta.2016.10.108] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 10/27/2016] [Accepted: 10/28/2016] [Indexed: 02/07/2023]
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734
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Ballesteros-Gómez A, Ballesteros J, Ortiz X, Jonker W, Helmus R, Jobst KJ, Parsons JR, Reiner EJ. Identification of Novel Brominated Compounds in Flame Retarded Plastics Containing TBBPA by Combining Isotope Pattern and Mass Defect Cluster Analysis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:1518-1526. [PMID: 28004576 DOI: 10.1021/acs.est.6b03294] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The study of not only main flame retardants but also of related degradation products or impurities has gained attention in the last years and is relevant to assess the safety of our consumer products and the emission of potential contaminants into the environment. In this study, we show that plastics casings of electric/electronic devices containing TBBPA contain also a complex mixture of related brominated chemicals. These compounds were most probably coming from impurities, byproducts, or degradation products of TBBPA and TBBPA derivatives. A total of 14 brominated compounds were identified based on accurate mass measurements (formulas and tentative structures proposed). The formulas (or number of bromine elements) for 19 other brominated compounds of minor intensity are also provided. A new script for the recognition of halogenated compounds based on combining a simplified isotope pattern and mass defect cluster analysis was developed in R for the screening. The identified compounds could be relevant from an environmental and industrial point of view.
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Affiliation(s)
- Ana Ballesteros-Gómez
- Institute for Environmental Studies, VU University Amsterdam , De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands
| | - Joaquín Ballesteros
- Department of Electronic Technology, University of Málaga , Bulevar Louis Pasteur 35, 29010 Málaga, Spain
| | - Xavier Ortiz
- Ontario Ministry of the Environment and Climate Change , 125 Resources Road, M9P 3 V6 Toronto, ON, Canada
| | - Willem Jonker
- Division of Bioanalytical Chemistry, VU University Amsterdam , De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Rick Helmus
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Karl J Jobst
- Ontario Ministry of the Environment and Climate Change , 125 Resources Road, M9P 3 V6 Toronto, ON, Canada
| | - John R Parsons
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Eric J Reiner
- Ontario Ministry of the Environment and Climate Change , 125 Resources Road, M9P 3 V6 Toronto, ON, Canada
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735
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Dietary intake of phosphorus flame retardants (PFRs) using Swedish food market basket estimations. Food Chem Toxicol 2017; 100:1-7. [DOI: 10.1016/j.fct.2016.12.011] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 12/08/2016] [Accepted: 12/10/2016] [Indexed: 02/01/2023]
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736
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Zhang W, Shen XY, Zhang WW, Chen H, Xu WP, Wei W. The effects of di 2-ethyl hexyl phthalate (DEHP) on cellular lipid accumulation in HepG2 cells and its potential mechanisms in the molecular level. Toxicol Mech Methods 2017; 27:245-252. [DOI: 10.1080/15376516.2016.1273427] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Wang Zhang
- Key Laboratory of Anti-inflammatory and Immune Medicine of Education Ministry, Anhui Collaborative Innovation Center of Anti-inflammatory and Immune Medicine, Institute of Clinical Pharmacology of Anhui Medical University, Hefei, Anhui, China
| | - Xin-Yue Shen
- Key Laboratory of Anti-inflammatory and Immune Medicine of Education Ministry, Anhui Collaborative Innovation Center of Anti-inflammatory and Immune Medicine, Institute of Clinical Pharmacology of Anhui Medical University, Hefei, Anhui, China
| | - Wen-Wen Zhang
- Key Laboratory of Anti-inflammatory and Immune Medicine of Education Ministry, Anhui Collaborative Innovation Center of Anti-inflammatory and Immune Medicine, Institute of Clinical Pharmacology of Anhui Medical University, Hefei, Anhui, China
| | - Hao Chen
- Key Laboratory of Anti-inflammatory and Immune Medicine of Education Ministry, Anhui Collaborative Innovation Center of Anti-inflammatory and Immune Medicine, Institute of Clinical Pharmacology of Anhui Medical University, Hefei, Anhui, China
| | - Wei-Ping Xu
- Affiliated Anhui Provincial Hospital, Anhui Medical University, Hefei, Anhui, China
| | - Wei Wei
- Key Laboratory of Anti-inflammatory and Immune Medicine of Education Ministry, Anhui Collaborative Innovation Center of Anti-inflammatory and Immune Medicine, Institute of Clinical Pharmacology of Anhui Medical University, Hefei, Anhui, China
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737
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Liu R, Lin Y, Ruan T, Jiang G. Occurrence of synthetic phenolic antioxidants and transformation products in urban and rural indoor dust. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 221:227-233. [PMID: 27916495 DOI: 10.1016/j.envpol.2016.11.069] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 11/22/2016] [Accepted: 11/25/2016] [Indexed: 06/06/2023]
Abstract
In this study, seven synthetic phenolic antioxidant (SPA) analogues were positively found in urban and rural indoor dust samples collected from Shandong province in China, among which the novel 2,4,6-tri-tert-butylphenol (AO 246), 2,6-di-tert-butyl-4-sec-butylphenol (DTBSBP), 2,4-di-tert-butylphenol (DBP) and 4,4'-butylidenebis (2-(1,1-dimethylethyl)-5- methyl-phenol) (AO 44B25) analogues accounted for 29% of total SPA concentrations (∑SPAs). Urban dust showed significantly higher ∑SPA levels (range: 1.56e3 - 2.03e4 ng/g) compared with those in rural indoor dust (668-4.39e3 ng/g, p < 0.05). 2,6-Di-tert-butyl-4-methylphenol (BHT) was the dominate analogue in the urban indoor dust, which constituted of 74% in ΣSPAs. While, varied composition profiles of SPAs were noticed in rural indoor dust, for instance, AO 246 (46%) and BHT (43%) had similar contributions to ∑SPAs. Three BHT transformation products (TPs) were also detected in most of the urban and rural dust samples (>97%), with individual residue level in the same order: 2,6-di-tert-butyl-1,4-benzoquinone (BHT-Q) > 2,6-di-tert-butyl-4-hydroxy- 4-methyl-2,5-cyclo-hexadienone (BHT-quinol) > 3,5-di-tert-butyl-4-hydroxybenzal-dehyde (BHT-CHO). Geometric mean values of total TP concentrations were 555 ng/g and 131 ng/g for urban and rural indoor dust samples, respectively. A preliminary estimated daily intake calculation at dust ingestion scenario suggested additional concerns might be paid to simultaneous exposure of several SPA analogues and TPs besides current focus on BHT exposure risks.
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Affiliation(s)
- Runzeng Liu
- 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 100049, China
| | - Yongfeng Lin
- 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 100049, China
| | - Ting Ruan
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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738
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Halloum W, Cariou R, Dervilly-Pinel G, Jaber F, Le Bizec B. APCI as an innovative ionization mode compared with EI and CI for the analysis of a large range of organophosphate esters using GC-MS/MS. JOURNAL OF MASS SPECTROMETRY : JMS 2017; 52:54-61. [PMID: 27868274 DOI: 10.1002/jms.3899] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 11/07/2016] [Accepted: 11/17/2016] [Indexed: 06/06/2023]
Abstract
Organophosphate esters (OPEs) are chemical compounds incorporated into materials as flame-proof and/or plasticizing agents. In this work, 13 non-halogenated and 5 halogenated OPEs were studied. Their mass spectra were interpreted and compared in terms of fragmentation patterns and dominant ions via various ionization techniques [electron ionization (EI) and chemical ionization (CI) under vacuum and corona discharge atmospheric pressure chemical ionization (APCI)] on gas chromatography coupled to mass spectrometry (GC-MS). The novelty of this paper relies on the investigation of APCI technique for the analysis of OPEs via favored protonation mechanism, where the mass spectra were mostly dominated by the quasi-molecular ion [M + H]+ . The EI mass spectra were dominated by ions such as [H4 PO4 ]+ , [M-R]+ , [M-Cl]+ , and [M-Br]+ , and for some non-halogenated aryl OPEs, [M]+● was also observed. The CI mass spectra in positive mode were dominated by [M + H]+ and sometimes by [M-R]+ , while in negative mode, [M-R]- and more particularly [X]- and [X2 ]-● were mainly observed for the halogenated OPEs. Both EI and APCI techniques showed promising results for further development of instrumental method operating in selective reaction monitoring mode. Instrumental detection limits by using APCI mode were 2.5 to 25 times lower than using EI mode for the non-brominated OPEs, while they were determined at 50-100 times lower by the APCI mode than by the EI mode, for the two brominated OPEs. The method was applied to fish samples, and monitored transitions by using APCI mode showed higher specificity but lower stability compared with EI mode. The sensitivity in terms of signal-to-noise ratio varying from one compound to another. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Wafaa Halloum
- Oniris, Laboratoire d'Etude des Résidus et Contaminants dans les Aliments (LABERCA), LUNAM Université, F-44307, Nantes, France
- Faculty of Sciences I, Laboratory of Analysis of Organic Compounds (LACO), Lebanese University, 508 Hadath, Beirut, Lebanon
| | - Ronan Cariou
- Oniris, Laboratoire d'Etude des Résidus et Contaminants dans les Aliments (LABERCA), LUNAM Université, F-44307, Nantes, France
| | - Gaud Dervilly-Pinel
- Oniris, Laboratoire d'Etude des Résidus et Contaminants dans les Aliments (LABERCA), LUNAM Université, F-44307, Nantes, France
| | - Farouk Jaber
- Faculty of Sciences I, Laboratory of Analysis of Organic Compounds (LACO), Lebanese University, 508 Hadath, Beirut, Lebanon
| | - Bruno Le Bizec
- Oniris, Laboratoire d'Etude des Résidus et Contaminants dans les Aliments (LABERCA), LUNAM Université, F-44307, Nantes, France
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739
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Iqbal M, Syed JH, Katsoyiannis A, Malik RN, Farooqi A, Butt A, Li J, Zhang G, Cincinelli A, Jones KC. Legacy and emerging flame retardants (FRs) in the freshwater ecosystem: A review. ENVIRONMENTAL RESEARCH 2017; 152:26-42. [PMID: 27741446 DOI: 10.1016/j.envres.2016.09.024] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/25/2016] [Accepted: 09/27/2016] [Indexed: 06/06/2023]
Abstract
In this review article, we have compiled and reviewed the previously published available literature on environmental distribution, behaviour, fate and regional trends of legacy and emerging flame retardants (FRs) including brominated (BFRs), organo-phosphate (OPFRs), novel brominated flame retardants (NBFRs) and dechlorane plus (DP) in the freshwater ecosystem. Transport and fate is discussed briefly with the evidences of de-bromination, sedimentation and accumulation in biota. De-bromination of BDE-209 is considered of concern because the lower brominated congeners are more toxic and mobile thus posing increased risk to the freshwater ecosystem. The available data on temporal and spatial trends as yet, is too few to show any consistent trends, enabling only general conclusions to be drawn. There is a lack of temporal studies in Asia, while, overall the trends are mixed, with both increasing and decreasing concentrations of BFRs and OPFRs. OPFRs and NBFRs have replaced classical BFRs (polybrominated diphenyl ethers (PBDEs)) in some countries but the amount of PBDEs in the environment is still considerable. Knowledge gaps and recommendations for future research are discussed emphasizing on further monitoring, advanced analytical methodologies, and risk assessment studies to completely understand the science of flame retardants in the freshwater ecosystem.
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Affiliation(s)
- Mehreen Iqbal
- Environmental Biology and Ecotoxicology Laboratory, Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad 45320, Pakistan
| | - Jabir Hussain Syed
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
| | - Athanasios Katsoyiannis
- Norwegian Institute for Air Research (NILU) - FRAM High North Research Centre on Climate and the Environment, Hjalmar Johansens gt. 14 NO - 9296 Tromsø, Norway
| | - Riffat Naseem Malik
- Environmental Biology and Ecotoxicology Laboratory, Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad 45320, Pakistan.
| | - Abida Farooqi
- Environmental Biology and Ecotoxicology Laboratory, Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad 45320, Pakistan
| | - Ayesha Butt
- Environmental Biology and Ecotoxicology Laboratory, Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad 45320, Pakistan
| | - Jun Li
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Gan Zhang
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Alessandra Cincinelli
- Department of Chemistry "Ugo Schiff", University of Florence, via della Lastruccia, 3 - 50019 Sesto Fiorentino, Florence, Italy; Institute for the Dynamics of Environmental Processes, Italian National Research Council (IDPA-CNR), Dorsoduro 2137, 30123 Venice, Italy
| | - Kevin C Jones
- Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK
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740
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Eng ML, Letcher RJ, Williams TD, Elliott JE. In ovo tris(2-butoxyethyl) phosphate concentrations significantly decrease in late incubation after a single exposure via injection, with no evidence of effects on hatching success or latent effects on growth or reproduction in zebra finches. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:83-88. [PMID: 27207485 DOI: 10.1002/etc.3502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 05/12/2016] [Accepted: 05/17/2016] [Indexed: 06/05/2023]
Abstract
Zebra finch (Taeniopygia guttata) eggs were injected with the organophosphate triester flame retardant tris(2-butoxyethyl) phosphate (TBOEP) at 0 μg/g, 0.01 μg/g, 1 μg/g, 10 μg/g, or 50 μg/g egg. Subsets of high-dose eggs were collected throughout incubation to measure TBOEP, which started declining in late incubation and then decreased rapidly to 28% of injected concentration by hatching. The authors found no effects of TBOEP on survival, growth, or reproduction even at very high doses. Environ Toxicol Chem 2017;36:83-88. © 2016 SETAC.
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Affiliation(s)
- Margaret L Eng
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
- Environment and Climate Change Canada, Ecotoxicology and Wildlife Health Division, Pacific Wildlife Research Centre, Delta, British Columbia, Canada
| | - Robert J Letcher
- Environment and Climate Change Canada, Ecotoxicology and Wildlife Health Division, National Wildlife Research Centre, Ottawa, Ontario, Canada
| | - Tony D Williams
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | - John E Elliott
- Environment and Climate Change Canada, Ecotoxicology and Wildlife Health Division, Pacific Wildlife Research Centre, Delta, British Columbia, Canada
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741
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Salamova A, Peverly AA, Venier M, Hites RA. Spatial and Temporal Trends of Particle Phase Organophosphate Ester Concentrations in the Atmosphere of the Great Lakes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:13249-13255. [PMID: 27993071 DOI: 10.1021/acs.est.6b04789] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The concentrations of six organophosphate esters (OPEs) in atmospheric particle phase samples collected once every 12 days at five sites in the North American Great Lakes basin over the period of March 2012 to December 2014, inclusive, are reported. These OPEs include tris(2-chloroethyl) phosphate (TCEP), tris(2-chloroisopropyl) phosphate (TCIPP), and tris(1,3-dichloroisopropyl) phosphate (TDCIPP), tri-n-butyl phosphate (TNBP), triphenyl phosphate (TPHP), and 2-ethylhexyl diphenyl phosphate (EHDP). Median total OPE concentrations (∑OPE) ranged from 93 pg/m3 at Sleeping Bear Dunes to 1046 pg/m3 at Chicago. The ∑OPE levels were significantly (P < 0.05) higher at Chicago and Cleveland, our urban sites, than at our rural and remote sites. The composition profiles were dominated by chlorinated OPEs at the urban and rural sites and by nonchlorinated OPEs at the remote sites. The concentrations of all OPEs were significantly (P < 0.001) correlated to one another, suggesting that these compounds share similar sources. Most atmospheric ∑OPE concentrations were significantly (P < 0.05) decreasing over time, with halving times of about 3.5 years at the urban sites and about 1.5 years at the rural and remote sites. Interestingly, TCEP and EHDP concentrations were increasing over time at the rural and remote sites with doubling times of 2.2 and 3.7 years, respectively.
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Affiliation(s)
- Amina Salamova
- School of Public and Environmental Affairs, Indiana University , Bloomington, Indiana 47405, United States
| | - Angela A Peverly
- Science and Mathematics Department, Eureka College , Eureka, Illinois 61530, United States
| | - Marta Venier
- School of Public and Environmental Affairs, Indiana University , Bloomington, Indiana 47405, United States
| | - Ronald A Hites
- School of Public and Environmental Affairs, Indiana University , Bloomington, Indiana 47405, United States
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742
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Wang G, Du Z, Chen H, Su Y, Gao S, Mao L. Tissue-Specific Accumulation, Depuration, and Transformation of Triphenyl Phosphate (TPHP) in Adult Zebrafish (Danio rerio). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:13555-13564. [PMID: 27993046 DOI: 10.1021/acs.est.6b04697] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Understanding bioaccumulation and metabolism is critical for evaluating the fate and potential toxicity of compounds in vivo. We recently investigated, for the first time, the bioconcentration and tissue distribution of triphenyl phosphate (TPHP) and its main metabolites in selected tissues of adult zebrafish. To further confirm the metabolites, deuterated TPHP (d15-TPHP) was used in the exposure experiments at an environmentally relevant level (20 μg/L) and at 1/10 LC50 (100 μg/L). After 11-14 days of exposure to 100 μg/L of d15-TPHP, the accumulation and excretion of d15-TPHP reached equilibrium, at which point the intestine contained the highest d15-TPHP (μg/g wet weight, ww) concentration (3.12 ± 0.43), followed by the gills (2.76 ± 0.12) > brain (2.58 ± 0.19) > liver (2.30 ± 0.34) ≫ muscle (0.53 ± 0.04). The major metabolite of d15-TPHP, d10-diphenyl phosphate (d10-DPHP), was detected at significantly higher contents in the liver and intestine, at levels up to 3.0-3.5 times those of d15-TPHP. The metabolic pathways of TPHP were elucidated, including hydrolysis, hydroxylation, and glucuronic acid conjugation after hydroxylation. Finally, a physiologically based toxicokinetic (PBTK) model was used to explore the key factors influencing the bioaccumulation of d15-TPHP in zebrafish. These results provide important information for the understanding of the metabolism, disposition, and toxicology of TPHP in aquatic organisms.
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Affiliation(s)
- Guowei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210093, China
| | - Zhongkun Du
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210093, China
| | - Hanyan Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210093, China
| | - Yu Su
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210093, China
| | - Shixiang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210093, China
| | - Liang Mao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210093, China
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743
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Castro-Jiménez J, González-Gaya B, Pizarro M, Casal P, Pizarro-Álvarez C, Dachs J. Organophosphate Ester Flame Retardants and Plasticizers in the Global Oceanic Atmosphere. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:12831-12839. [PMID: 27775328 DOI: 10.1021/acs.est.6b04344] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Organophosphate esters (OPEs) are widely used as flame retardants and plasticizers and have been detected ubiquitously in the remote atmosphere. Fourteen OPEs were analyzed in 115 aerosol phase samples collected from the tropical and subtropical Atlantic, Pacific, and Indian Oceans during the MALASPINA circumnavigation campaign. OPEs were detected in all samples with concentrations ranging from 360 to 4400 pg m-3 for the sum of compounds. No clear concentration trends were found between the Northern and Southern hemispheres. The pattern was generally dominated by tris(1-chloro-2-propyl) phosphate (TCPP), although tri-n-butyl phosphate (TnBP) had a predominant role in samples close to continents and in those influenced by air masses originating in continents. The dry deposition fluxes of aerosol phase ∑14OPE ranged from 4 to 140 ng m-2 d-1. An estimation of the OPE gas phase concentration and gross absorption fluxes by using three different sets of physical chemical properties suggested that the atmosphere-ocean diffusive exchange of OPEs could be 2-3 orders of magnitude larger than dry deposition. The associated organic phosphorus inputs coming from diffusive OPE fluxes were estimated to potentially trigger up to 1.0% of the reported primary production in the most oligotrophic oceanic regions. However, the uncertainty associated with these calculations is high and mostly driven by the uncertainty of the physical chemical properties of OPEs. Further constraints of the physical chemical properties and fluxes of OPEs are urgently needed, in order to estimate their environmental fate and relevance as a diffusive source of new organic phosphorus to the ocean.
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Affiliation(s)
- Javier Castro-Jiménez
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC) , Jordi Girona, 18-26, 08034 Barcelona, Spain
- Aix Marseille University, CNRS/INSU, University of Toulon, IRD, Mediterranean Institute of Oceanography (MIO) UM 110 , 13288, Marseille, France
| | - Belén González-Gaya
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC) , Jordi Girona, 18-26, 08034 Barcelona, Spain
- Department of Instrumental Analysis and Environmental Chemistry, Institute of Organic Chemistry (IQOG-CSIC) , Juan de la Cierva 3, Madrid, Spain
| | - Mariana Pizarro
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC) , Jordi Girona, 18-26, 08034 Barcelona, Spain
| | - Paulo Casal
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC) , Jordi Girona, 18-26, 08034 Barcelona, Spain
| | - Cristina Pizarro-Álvarez
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC) , Jordi Girona, 18-26, 08034 Barcelona, Spain
| | - Jordi Dachs
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC) , Jordi Girona, 18-26, 08034 Barcelona, Spain
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744
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Sun L, Tan H, Peng T, Wang S, Xu W, Qian H, Jin Y, Fu Z. Developmental neurotoxicity of organophosphate flame retardants in early life stages of Japanese medaka (Oryzias latipes). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2016; 35:2931-2940. [PMID: 27146889 DOI: 10.1002/etc.3477] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 03/27/2016] [Accepted: 05/02/2016] [Indexed: 05/21/2023]
Abstract
Because brominated flame retardants are being banned or phased out worldwide, organophosphate flame retardants have been used as alternatives on a large scale and have thus become ubiquitous environmental contaminants; this raises great concerns about their environmental health risk and toxicity. Considering that previous research has identified the nervous system as a sensitive target, Japanese medaka were used as an aquatic organism model to evaluate the developmental neurotoxicity of 4 organophosphate flame retardants: triphenyl phosphate, tri-n-butyl phosphate, tris(2-butoxyethyl) phosphate, and tris(2-chloroethyl) phosphate (TCEP). The embryo toxicity test showed that organophosphate flame retardant exposure could decrease hatchability, delay time to hatching, increase the occurrence of malformations, reduce body length, and slow heart rate. Regarding locomotor behavior, exposure to the tested organophosphate flame retardants (except TCEP) for 96 h resulted in hypoactivity for medaka larvae in both the free-swimming and the dark-to-light photoperiod stimulation test. Changes of acetylcholinesterase activity and transcriptional responses of genes related to the nervous system likely provide a reasonable explanation for the neurobehavioral disruption. Overall, the present study clearly demonstrates the developmental neurotoxicity of various organophosphate flame retardants with very different potency and contribute to the determination of which organophosphate flame retardants are appropriate substitutes, as well as the consideration of whether regulations are reasonable and required. Environ Toxicol Chem 2016;35:2931-2940. © 2016 SETAC.
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Affiliation(s)
- Liwei Sun
- College of Environment, Zhejiang University of Technology, Hangzhou, China
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Hana Tan
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
| | - Tao Peng
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
| | - Sisi Wang
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
| | - Wenbin Xu
- Department of Food Science and Technology, Ocean College, Zhejiang University of Technology, Hangzhou, China
| | - Haifeng Qian
- College of Environment, Zhejiang University of Technology, Hangzhou, China
| | - Yuanxiang Jin
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
| | - Zhengwei Fu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
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745
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Van den Eede N, Ballesteros-Gómez A, Neels H, Covaci A. Does Biotransformation of Aryl Phosphate Flame Retardants in Blood Cast a New Perspective on Their Debated Biomarkers? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:12439-12445. [PMID: 27766855 DOI: 10.1021/acs.est.6b03214] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Aryl phosphate flame retardants (aryl-PFRs), such as triphenyl phosphate (TPHP) and 2-ethylhexyl diphenyl phosphate (EHDPHP), are emerging contaminants that can exhibit toxic properties, including severe aquatic toxicity and endocrine disruptive effects. Monitoring exposure to aryl-PFRs through specific biomarkers is necessary to assess the health risk associated with chronic exposure. Hydrolytic serum enzymes could play an important role in the formation of the hydrolysis product diphenyl phosphate (DPHP), the seemingly most abundant in vivo biomarker of TPHP in urine. Here, we assess whether serum enzymes have an impact on the toxicokinetics of TPHP and EHDPHP and on the contribution of both aryl-PFRs to in vivo DPHP levels. TPHP and EHDPHP were incubated separately with pooled human serum to measure the formation of hydrolysis products DPHP and 2-ethylhexyl phenyl phosphate (EHPHP) by liquid chromatography-tandem mass spectrometry. Clearance of TPHP and EHDPHP was 70 and 8.6 mL/min/L serum (as measured by formation of DPHP and EHPHP, respectively). No discernible amount of DPHP was produced from EHDPHP by serum hydrolases. Our results suggest that serum hydrolases can significantly contribute to the in vivo levels of DPHP formed from TPHP and can play an important role in the toxicokinetics, toxicity, and selection of biomarkers for aryl-PFRs.
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Affiliation(s)
- Nele Van den Eede
- University of Antwerp, Toxicological Center , Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Ana Ballesteros-Gómez
- University of Antwerp, Toxicological Center , Universiteitsplein 1, 2610 Wilrijk, Belgium
- VU University Amsterdam, Institute for Environmental Studies , De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands
| | - Hugo Neels
- University of Antwerp, Toxicological Center , Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Adrian Covaci
- University of Antwerp, Toxicological Center , Universiteitsplein 1, 2610 Wilrijk, Belgium
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746
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Tris (1,3-dichloro-2-propyl) phosphate-induced apoptotic signaling pathways in SH-SY5Y neuroblastoma cells. Neurotoxicology 2016; 58:1-10. [PMID: 27816613 DOI: 10.1016/j.neuro.2016.10.018] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Revised: 10/30/2016] [Accepted: 10/31/2016] [Indexed: 01/08/2023]
Abstract
Tris (1, 3-dichloro-2-propyl) phosphate (TDCIPP, also known as TDCPP), an extensively used flame retardant, is frequently detected in the environment and biota. Recent studies have shown that TDCIPP has neurotoxic effects. In this study, we determined the mechanisms of TDCIPP-induced neurotoxicity in human neuroblastoma (SH-SY5Y) cells. By using morphological examination, flow cytometry, and mitochondrial membrane potential (ΔYm) measurement, we confirmed that exposure to TDCIPP caused apoptosis accompanied by the activation of apoptosis-related genes (e.g. Bax and Bcl-2) and caspase 3 protein in SH-SY5Y cells. Increased reactive oxygen species (ROS) formation and intracellular calcium ions ([Ca2+]i) were also observed in TDCIPP-treated SH-SY5Y cells. Exposure to TDCIPP led to the activation of protein markers of endoplasmic reticulum (ER) stress, including eukaryotic translation initiation factor 2a subunit (p-EIF2a), activation transcription factor (ATF4), glucose-regulated protein (GRP78), and the proapoptotic factor C/EBP homologous protein (CHOP). To determine the role of the ER in apoptosis, phenyl butyric acid (PBA), an ER stress inhibitor, was applied. Treatment with PBA effectively attenuated TDCIPP-induced ER stress and protected against apoptotic death in SH-SY5Y cells by inhibition of Bax expression and promotion of Bcl-2 expression. Furthermore, we found that pretreatment of the cells with the ROS scavenger N-acetyl cysteine (NAC) inhibited the ER stress response and prevented apoptosis. The combination of PBA and NAC pretreatment could further prevent TDCIPP induced ER-stress and apoptotic death compared with PBA or NAC pretreatment alone. Thus, in the present study, we demonstrated that TDCIPP induces cytotoxicity through a ROS-dependent mechanism involving ER stress and activation of mitochondrial apoptotic pathways in SH-SY5Y cells.
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747
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Giulivo M, Capri E, Eljarrat E, Barceló D. Analysis of organophosphorus flame retardants in environmental and biotic matrices using on-line turbulent flow chromatography-liquid chromatography-tandem mass spectrometry. J Chromatogr A 2016; 1474:71-78. [DOI: 10.1016/j.chroma.2016.10.042] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 10/14/2016] [Accepted: 10/14/2016] [Indexed: 10/20/2022]
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748
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Ali N, Eqani SAMAS, Ismail IMI, Malarvannan G, Kadi MW, Albar HMS, Rehan M, Covaci A. Brominated and organophosphate flame retardants in indoor dust of Jeddah, Kingdom of Saudi Arabia: Implications for human exposure. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 569-570:269-277. [PMID: 27343946 DOI: 10.1016/j.scitotenv.2016.06.093] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 06/12/2016] [Accepted: 06/13/2016] [Indexed: 06/06/2023]
Abstract
Different flame retardants (FRs) namely polybrominated diphenyl ethers (PBDEs), emerging brominated/chlorinated flame retardants (Br/Cl FRs), and organophosphate FRs (OPFRs) were analyzed in cars, air conditioner (AC) filters and floor dust of different households from Jeddah, Kingdom of Saudi Arabia (KSA). To the best of our knowledge, this is first study in literature reporting emerging Br/Cl FRs and OPFRs in AC filter dust and also first to report on their occurrence in dust from KSA. Chlorinated alkyl phosphate, penta-BDEs, BDE-209, and decabromodiphenylethane (DBDPE) were the major chemicals in dust samples from all microenvironments. ΣOPFRs occurred at median concentrations (ng/g dust) of 15,400, 10,500, and 3750 in AC filter, car and house floor dust, respectively. For all analyzed chemicals, relatively lower levels were observed in floor dust than car and AC filter dust. The profiles of FRs in car dust were different from AC filter and floor dust, which reflected their wider application as FR and plasticizer in variety of household and commercial products. For toddlers, assuming high dust intake and 95th percentile concentrations, the computed exposure estimation for BDE-99 was higher than RfD values.
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Affiliation(s)
- Nadeem Ali
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Saudi Arabia.
| | - Syed Ali Musstjab Akber Shah Eqani
- Public Health and Environment Division, Department of Biosciences, COMSATS Institute of Information Technology, Park Road, Islamabad, Pakistan
| | - Iqbal Mohammad Ibrahim Ismail
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Chemistry, Faculty of Science, King Abdul Aziz University, Jeddah, Saudi Arabia
| | - Govindan Malarvannan
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Mohammad W Kadi
- Department of Chemistry, Faculty of Science, King Abdul Aziz University, Jeddah, Saudi Arabia
| | | | - Mohammad Rehan
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Adrian Covaci
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
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749
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Saini A, Thaysen C, Jantunen L, McQueen RH, Diamond ML. From Clothing to Laundry Water: Investigating the Fate of Phthalates, Brominated Flame Retardants, and Organophosphate Esters. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:9289-97. [PMID: 27507188 DOI: 10.1021/acs.est.6b02038] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The accumulation of phthalate esters, brominated flame retardants (BFRs) and organophosphate esters (OPEs) by clothing from indoor air and transfer via laundering to outdoors were investigated. Over 30 days cotton and polyester fabrics accumulated 3475 and 1950 ng/dm(2) ∑5phthalates, 65 and 78 ng/dm(2) ∑10BFRs, and 1200 and 310 ng/dm(2) ∑8OPEs, respectively. Planar surface area concentrations of OPEs and low molecular weight phthalates were significantly greater in cotton than polyester and similar for BFRs and high molecular weight phthalates. This difference was significantly and inversely correlated with KOW, suggesting greater sorption of polar compounds to polar cotton. Chemical release from cotton and polyester to laundry water was >80% of aliphatic OPEs (log KOW < 4), < 50% of OPEs with an aromatic structure, 50-100% of low molecular weight phthalates (log KOW 4-6), and < detection-35% of higher molecular weight phthalates (log KOW > 8) and BFRs (log KOW > 6). These results support the hypothesis that clothing acts an efficient conveyer of soluble semivolatile organic compounds (SVOCs) from indoors to outdoors through accumulation from air and then release during laundering. Clothes drying could as well contribute to the release of chemicals emitted by electric dryers. The results also have implications for dermal exposure.
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Affiliation(s)
- Amandeep Saini
- Department of Physical and Environmental Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario M1C 1A4 Canada
| | - Clara Thaysen
- Department of Earth Sciences, 22 Russell Street, University of Toronto , Toronto, Ontario M5S 3B1 Canada
| | - Liisa Jantunen
- Department of Earth Sciences, 22 Russell Street, University of Toronto , Toronto, Ontario M5S 3B1 Canada
- Air Quality Processes Research Section, Environment and Climate Change Canada , 6248 Eighth Line, Egbert, Ontario L0L 1N0 Canada
| | - Rachel H McQueen
- Department of Human Ecology, University of Alberta , Edmonton, Alberta T6G 2N1 Canada
| | - Miriam L Diamond
- Department of Physical and Environmental Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario M1C 1A4 Canada
- Department of Earth Sciences, 22 Russell Street, University of Toronto , Toronto, Ontario M5S 3B1 Canada
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750
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Lazarov B, Swinnen R, Poelmans D, Spruyt M, Goelen E, Covaci A, Stranger M. Influence of suspended particles on the emission of organophosphate flame retardant from insulation boards. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:17183-17190. [PMID: 27215988 DOI: 10.1007/s11356-016-6886-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 05/11/2016] [Indexed: 06/05/2023]
Abstract
The influence of the presence of the so-called seed particles on the emission rate of Tris (1-chloroisopropyl) phosphate (TCIPP) from polyisocyanurate (PIR) insulation boards was investigated in this study. Two Field and Laboratory Emission Test cells (FLEC) were placed on the surface of the same PIR board and respectively supplied with clean air (reference FLEC) and air containing laboratory-generated soot particles (test FLEC). The behavior of the area-specific emission rates (SER A ) over a time period of 10 days was studied by measuring the total (gas + particles) concentrations of TCIPP at the exhaust of each FLEC. The estimated SER A of TCIPP from the PIR board at the quasi-static equilibrium were found to be 0.82 μg m(-2) h(-1) in the absence of seed particles, while the addition of soot particles led to SER A of 2.16 μg m(-2) h(-1). This indicates an increase of the SER A of TCIPP from the PIR board with a factor of 3 in the presence of soot particles. The TCIPP partition coefficient to soot particles at the quasi-static equilibrium was 0.022 ± 0.012 m(3) μg(-1). In the next step, the influence of real-life particles on TCIPP emission rates was investigated by supplying the test FLEC with air from a professional kitchen where mainly frying and baking activities took place. Similar to the reference FLEC outcomes, SER A was also found to increase in this real-life experiment over a time period of 20 days by a factor 3 in the presence of particles generated during cooking activities. The median value of estimated particle-gas coefficient for this test was 0.062 ± 0.037 m(3) μg(-1).
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Affiliation(s)
- Borislav Lazarov
- Environmental Risk and Health Unit, VITO, Boeretang 200, 2400, Mol, Belgium.
| | - Rudi Swinnen
- Environmental Risk and Health Unit, VITO, Boeretang 200, 2400, Mol, Belgium
| | - David Poelmans
- Environmental Risk and Health Unit, VITO, Boeretang 200, 2400, Mol, Belgium
| | - Maarten Spruyt
- Environmental Risk and Health Unit, VITO, Boeretang 200, 2400, Mol, Belgium
| | - Eddy Goelen
- Environmental Risk and Health Unit, VITO, Boeretang 200, 2400, Mol, Belgium
| | - Adrian Covaci
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| | - Marianne Stranger
- Environmental Risk and Health Unit, VITO, Boeretang 200, 2400, Mol, Belgium
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