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Saravanan P, Saravanan V, Rajeshkannan R, Arnica G, Rajasimman M, Baskar G, Pugazhendhi A. Comprehensive review on toxic heavy metals in the aquatic system: sources, identification, treatment strategies, and health risk assessment. ENVIRONMENTAL RESEARCH 2024; 258:119440. [PMID: 38906448 DOI: 10.1016/j.envres.2024.119440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 05/08/2024] [Accepted: 06/17/2024] [Indexed: 06/23/2024]
Abstract
Heavy metal pollution in water sources has become a major worldwide environmental issue, posing a threat to aquatic ecosystems and human health. The pollution of the aquatic environment is increasing as a result of industrialization, climate change, and urban development. The sources of heavy metal pollution in water include mining waste, leachates from landfills, municipal and industrial wastewater, urban runoff, and natural events such as volcanism, weathering, and rock abrasion. Heavy metal ions are toxic and potentially carcinogenic. They can also buildup in biological systems and cause bioaccumulation even at low levels of exposure, heavy metals can cause harm to organs such as the nervous system, liver and lungs, kidneys and stomach, skin, and reproductive systems. There were various approaches tried to purify water and maintain water quality. The main purpose of this article was to investigate the occurrence and fate of the dangerous contaminants (Heavy metal and metalloids) found in domestic and industrial effluents. This effluent mixes with other water streams and is used for agricultural activities and other domestic activities further complicating the issue. It also discussed conventional and non-conventional treatment methods for heavy metals from aquatic environments. Conclusively, a pollution assessment of heavy metals and a human health risk assessment of heavy metals in water resources have been explained. In addition, there have been efforts to focus on heavy metal sequestration from industrial waste streams and to create a scientific framework for reducing heavy metal discharges into the aquatic environment.
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Affiliation(s)
- Panchamoorthy Saravanan
- Department of Petrochemical Technology, UCE - BIT Campus, Anna University, Tiruchirappalli, Tamil Nadu, 620024, India.
| | - V Saravanan
- Department of Chemical Engineering, Annamalai University, Chidambaram, Tamil Nadu, 608002, India
| | - R Rajeshkannan
- Department of Chemical Engineering, Annamalai University, Chidambaram, Tamil Nadu, 608002, India
| | - G Arnica
- Department of Petrochemical Technology, UCE - BIT Campus, Anna University, Tiruchirappalli, Tamil Nadu, 620024, India
| | - M Rajasimman
- Department of Chemical Engineering, Annamalai University, Chidambaram, Tamil Nadu, 608002, India
| | - Gurunathan Baskar
- Department of Biotechnology, St. Joseph's College of Engineering, Chennai, 600119, Tamil Nadu, India; School of Engineering, Lebanese American University, Byblos, 1102 2801, Lebanon
| | - Arivalagan Pugazhendhi
- Tecnologico de Monterrey, Centre of Bioengineering, NatProLab, Plant Innovation Lab, School of Engineering and Sciences, Queretaro 76130, Mexico; Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam-603103, Tamil Nadu, India.
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Yang S, Sun L, Sun Y, Song K, Qin Q, Zhu Z, Xue Y. Towards an integrated health risk assessment framework of soil heavy metals pollution: Theoretical basis, conceptual model, and perspectives. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 316:120596. [PMID: 36343852 DOI: 10.1016/j.envpol.2022.120596] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/30/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
The health risk of soil heavy metals pollution has been gaining increasing public concern. However, many countries have not set their own health risk assessment (HRA) framework and most of the existing studies directly referred to the USEPA risk assessment model and parameters. For those countries that do not propose an original HRA framework, the experience of developed countries is crucial for advancing their own HRA system. This study systematically reviewed the development of HRA framework in some representative developed countries. The theoretical basis, conceptual model, progress, and challenges of HRA researches concerning soil heavy metals pollution were summarized. By recalling and comparing the health risk-related laws and guidance in the USA, UK, and Japan, results showed that the construction of HRA framework varied between these countries, but HRA has become the main method for deriving their soil environmental criteria. We further summarized the evaluation scales, land use types, exposure pathways, and sensitive receptors of HRA studies, and highlighted the key parameters affecting health risk outputs. There has been a shift toward the incorporation of probabilistic modeling, metals bioavailability, and sources emission characteristics into recent HRA studies. Nonetheless, challenges remained on how to minimize the uncertainty of generating probability distribution and detecting metal bioavailability. To facilitate the development of HRA framework, it was advised that developing countries should strengthen the theoretical researches of health risk and localization researches of exposure factors. Future directions are suggested to tend to: 1) promote sensitive analysis to quantify the impact of distribution assumptions on health risk outputs, 2) derive reasonable risk threshold and consistent evaluation protocol for bioavailability-based health risk assessment method, and 3) strive to explore the combined health effect of exposure to heavy metals in soil through source-media-receptor integrated studies.
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Affiliation(s)
- Shiyan Yang
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China
| | - Lijuan Sun
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China
| | - Yafei Sun
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China
| | - Ke Song
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China
| | - Qin Qin
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China
| | - Zhengyi Zhu
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China
| | - Yong Xue
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China.
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Yan YZ, Hu YH, Guo H, Lin KQ. Burden of cardiovascular disease attributable to dietary lead exposure in adolescents and adults in China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156315. [PMID: 35636555 DOI: 10.1016/j.scitotenv.2022.156315] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 05/16/2022] [Accepted: 05/25/2022] [Indexed: 06/15/2023]
Abstract
Lead is a naturally occurring metal with a range of industrial applications; however, it can cause adverse health effects upon human exposure. Even if blood lead levels (BLLs) in the human body are in the acceptable range, it is independently associated with cardiovascular disease (CVD), which is the leading cause of death in China. However, the role of lead exposure in CVD outcomes has not been quantified well. A top-down approach was adopted in this study to calculate the population attribution fraction (PAF) by combining pooled BLLs in the Chinese population reported between 2001 and 2022 with the relative risk (RR) of lead-induced CVD. Subsequently, the disease burden (DB) of lead-induced CVD was estimated and expressed in disability-adjusted life years (DALYs), and the attribution analysis about various sources of lead exposure was performed. Among Chinese adolescents and adults, BLLs of 5.50 ± 2.45 μg/dL resulted in an estimated total DB (×106 DALYs) of 2.21 (2.07-2.32) for CVD, including 1.18 (1.12-1.25), 0.71 (0.69-0.74), 0.23 (0.15-0.26), and 0.02 (0.02-0.02) for stroke, and ischemic, hypertensive, and rheumatic heart diseases, respectively. Dietary lead intake was a major contributor to the DB (68.1%), and lead ingested through food was responsible for 15.1 × 105 DALYs of the CVD burden. Guangxi, Hunan, and Yunnan regions in China reported higher BLLs in adolescents and adults, and the DB of lead-induced CVD was higher in Hunan, Henan, and Sichuan. Lead is a risk factor for CVD that can cause significant DB. Further practical and cost-effective efforts to reduce lead exposure are urgently needed.
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Affiliation(s)
- Yi-Zhong Yan
- Department of Preventive Medicine, Medical College, Shihezi University, Shihezi 832002, China.
| | - Yun-Hua Hu
- Department of Preventive Medicine, Medical College, Shihezi University, Shihezi 832002, China
| | - Hong Guo
- Department of Preventive Medicine, Medical College, Shihezi University, Shihezi 832002, China
| | - Kang-Qian Lin
- Department of Preventive Medicine, Medical College, Shihezi University, Shihezi 832002, China
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Hussain S, Khan M, Sheikh TMM, Mumtaz MZ, Chohan TA, Shamim S, Liu Y. Zinc Essentiality, Toxicity, and Its Bacterial Bioremediation: A Comprehensive Insight. Front Microbiol 2022; 13:900740. [PMID: 35711754 PMCID: PMC9197589 DOI: 10.3389/fmicb.2022.900740] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/09/2022] [Indexed: 02/04/2023] Open
Abstract
Zinc (Zn) is one of the most abundantly found heavy metals in the Earth's crust and is reported to be an essential trace metal required for the growth of living beings, with it being a cofactor of major proteins, and mediating the regulation of several immunomodulatory functions. However, its essentiality also runs parallel to its toxicity, which is induced through various anthropogenic sources, constant exposure to polluted sites, and other natural phenomena. The bioavailability of Zn is attributable to various vegetables, beef, and dairy products, which are a good source of Zn for safe consumption by humans. However, conditions of Zn toxicity can also occur through the overdosage of Zn supplements, which is increasing at an alarming rate attributing to lack of awareness. Though Zn toxicity in humans is a treatable and non-life-threatening condition, several symptoms cause distress to human activities and lifestyle, including fever, breathing difficulty, nausea, chest pain, and cough. In the environment, Zn is generally found in soil and water bodies, where it is introduced through the action of weathering, and release of industrial effluents, respectively. Excessive levels of Zn in these sources can alter soil and aquatic microbial diversity, and can thus affect the bioavailability and absorption of other metals as well. Several Gram-positive and -negative species, such as Bacillus sp., Staphylococcus sp., Streptococcus sp., and Escherichia coli, Pseudomonas sp., Klebsiella sp., and Enterobacter sp., respectively, have been reported to be promising agents of Zn bioremediation. This review intends to present an overview of Zn and its properties, uses, bioavailability, toxicity, as well as the major mechanisms involved in its bioremediation from polluted soil and wastewaters.
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Affiliation(s)
- Sarfraz Hussain
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, China
| | - Maryam Khan
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Taha Majid Mahmood Sheikh
- Institute of Plant Protection, Jiangsu Academy of Agriculture Sciences, Nanjing, China,*Correspondence: Taha Majid Mahmood Sheikh,
| | - Muhammad Zahid Mumtaz
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Talha Ali Chohan
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Saba Shamim
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan,Saba Shamim,
| | - Yuhong Liu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, China,Yuhong Liu,
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Li Z. Quantifying exposure source allocation factors of pesticides in support of regulatory human health risk assessment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 309:114697. [PMID: 35151136 DOI: 10.1016/j.jenvman.2022.114697] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/21/2022] [Accepted: 02/06/2022] [Indexed: 06/14/2023]
Abstract
One of the challenges while assessing the aggregate exposure risk of pesticides is quantifying exposure doses from various exposure pathways. To address this issue, a regulatory screening approach is proposed for evaluating pesticide allocation factors (AFs) for major exposure pathways for rural and urban residents. This was achieved by integrating dynamiCrop and other screening models to estimate the potential human intake of residues from major crops at harvest, livestock products, and main environmental media (air, water, and soil). The AFs were calculated from the average daily dose factors (ADDFs) of pesticides via major exposure pathways, where a large AF of an exposure pathway indicates that a greater margin of exposure should be given to that exposure pathway. The simulated results for many current-use pesticides showed that the ingestion of crops had pesticide AFs close to 1.0, which indicated that the crop exposure pathway contributed to a significant portion of the total exposure to pesticides. In contrast, for legacy pesticides with high lipophilicity and low degradability in the environment, the simulated AFs for major environmental compartments (air, freshwater, and soil) accounted for relatively large exposures. As legacy pesticides have been banned globally, exposure pathways via the food web and environmental media cannot be neglected because of their high lipophilicity and environmental persistence. Although other factors such as geographical conditions and living habits should be considered to improve the spatial resolution of the model, the method proposed in this study can serve as a preliminary tool to conduct screening-level risk assessments for populations by considering the allocated exposure to pesticides via major exposure pathways.
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Affiliation(s)
- Zijian Li
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, Guangdong, 518107, China.
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Fan X, Wang Z, Li Y, Wang H, Fan W, Dong Z. Estimating the dietary exposure and risk of persistent organic pollutants in China: A national analysis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 288:117764. [PMID: 34280741 DOI: 10.1016/j.envpol.2021.117764] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 07/05/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
Substantial heterogeneities have been found in previous estimations of the risk from dietary exposures to persistent organic pollutants (POPs) in China, mainly due to spatiotemporal variations. To comprehensively evaluate the dietary risks of POPs listed in the Stockholm Convention, more than 27,580 data records from 753 reports published over the last three decades were examined. Respectively, for various food categories, the results obtained for the range of mean concentrations of POPs are as follows: total dichlorodiphenyltrichloroethanes (DDTs: 1.4-27.1 μg/kg), hexachlorocyclohexanes (HCHs: 1.8-29.3 μg/kg), polybrominated diphenyl ethers (PBDEs: 0.046-2.82 μg/kg), polychorinated biphenyls (PCBs: 0.05-7.57 μg/kg), polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD&Fs: 2.9-210 pg toxic equivalent (TEQ)/kg), perfluorooctanoic acid (PFOA: 0.02-0.97 μg/kg), perfluoroctane sulfonate (PFOS: 0.00082-2.76 μg/kg) and short-chain chlorinated paraffins (SCCPs: 64-348.92 μg/kg). Temporal decreasing trends were observed for DDTs, HCHs, PBDEs, PCDD&Fs, and PFOA, with no significant change for other POPs. Meanwhile, the estimated daily intake for adults were 75.2 ± 43.6 ng/kg/day for DDTs, 123 ± 87 ng/kg/day for HCHs, 0.37 ± 0.17 pg TEQ/kg/day for PCDD&Fs, 17.8 ± 9.5 ng/kg/day for PCBs, 3.3 ± 1.8 ng/kg/day for PBDEs, 3.6 ± 1.9 ng/kg/day for PFOA, 3.3 ± 2.0 ng/kg/day for PFOS, and 2.5 ± 1.6 μg/kg/day for SCCPs. Furthermore, non-carcinogenic risks were the highest for PCBs (0.89) and PCDD&Fs (0.53), followed by PFOA (0.18), PFOS (0.17), HCHs (0.062), SCCPs (0.025), DDTs (0.0075), and PBDEs (0.00047). These findings illustrated that exposure to POPs declined due to the control policies implemented in China, while the cumulative risk of POPs was still higher than 1, indicating continuous efforts are required to mitigate associated contamination.
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Affiliation(s)
- Xiarui Fan
- School of Space and Environment, Beihang University, Beijing, 100191, China
| | - Ziwei Wang
- School of Space and Environment, Beihang University, Beijing, 100191, China
| | - Yao Li
- School of Space and Environment, Beihang University, Beijing, 100191, China
| | - Hao Wang
- School of Space and Environment, Beihang University, Beijing, 100191, China
| | - Wenhong Fan
- School of Space and Environment, Beihang University, Beijing, 100191, China; Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University, Beijing, 100191, China
| | - Zhaomin Dong
- School of Space and Environment, Beihang University, Beijing, 100191, China; Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University, Beijing, 100191, China.
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Yao W, Gallagher DL, Gohlke JM, Dietrich AM. Children and adults are exposed to dual risks from ingestion of water and inhalation of ultrasonic humidifier particles from Pb-containing water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 791:148248. [PMID: 34139495 DOI: 10.1016/j.scitotenv.2021.148248] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 06/12/2023]
Abstract
Room-sized ultrasonic humidifiers are exposure pathways to aerosolized metals, with dose positively associated with increased concentrations of metals in fill water. This study innovatively quantifies water ingestion along with inhalation doses from humidifiers for 10-1000 μg/L dissolved lead (Pb) in tap water. The subsequent indoor air Pb concentrations, average daily doses, and inhalation deposited respiratory fractions were predicted under four room scenarios for 3-mo, 12-mo, 28-mo, and 6-yr children and adults. Elevated blood Pb levels (BLLs) in children were modeled using USEPA's Integrated Exposure Uptake Biokinetic (IEUBK) model. Indoor air Pb exceeds the USEPA ambient air standard of 0.15 μg/m3 when humidifier fill water contains 33 μg/L Pb in the small room of 33.5 m3 and 0.2 h-1 air exchange rate (AER). For this room, ~40-46% inhaled Pb-containing humidifier particles deposit in children's respiratory tracts; inhaling humidifier particles from ≥500 μg/L Pb water results in >1 μg/dL BLL in 2-7 yr children. For adults, ~23% of particles deposit in the respiratory tract; 8-h inhalation exposure with ≥17 μg/L Pb water exceeds the California EPA reproductive toxicity guideline of 0.5 μg/day. Larger rooms and higher AER decrease Pb inhalation exposure under the same water Pb concentration.
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Affiliation(s)
- Wenchuo Yao
- Department of Civil & Environmental Engineering, Virginia Tech, Blacksburg, VA, USA
| | - Daniel L Gallagher
- Department of Civil & Environmental Engineering, Virginia Tech, Blacksburg, VA, USA
| | - Julia M Gohlke
- Department of Population Health Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Andrea M Dietrich
- Department of Civil & Environmental Engineering, Virginia Tech, Blacksburg, VA, USA.
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Danziger J, Mukamal KJ, Weinhandl E. Associations of Community Water Lead Concentrations with Hemoglobin Concentrations and Erythropoietin-Stimulating Agent Use among Patients with Advanced CKD. J Am Soc Nephrol 2021; 32:2425-2434. [PMID: 34266982 PMCID: PMC8722797 DOI: 10.1681/asn.2020091281] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 03/21/2021] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Although patients with kidney disease may be particularly susceptible to the adverse health effects associated with lead exposure, whether levels of lead found commonly in drinking water are associated with adverse outcomes in patients with ESKD is not known. METHODS To investigate associations of lead in community water systems with hemoglobin concentrations and erythropoietin stimulating agent (ESA) use among incident patients with ESKD, we merged data from the Environmental Protection Agency (EPA) Safe Drinking Water Information System (documenting average 90th percentile lead concentrations in community water systems during 5 years before dialysis initiation, according to city of residence) with patient-level data from the United States Renal Data System. RESULTS Among 597,968 patients initiating dialysis in the United States in 2005 through 2017, those in cities with detectable lead levels in community water had significantly lower pre-ESKD hemoglobin concentrations and more ESA use per 0.01 mg/L increase in 90th percentile water lead. Findings were similar for the 208,912 patients with data from the first month of ESKD therapy, with lower hemoglobin and higher ESA use per 0.01 mg/L higher lead concentration. These associations were observed at lead levels below the EPA threshold (0.015 mg/L) that mandates regulatory action. We also observed environmental inequities, finding significantly higher water lead levels and slower declines over time among Black versus White patients. CONCLUSIONS This first nationwide analysis linking EPA water supply records to patient data shows that even low levels of lead that are commonly encountered in community water systems throughout the United States are associated with lower hemoglobin levels and higher ESA use among patients with advanced kidney disease.
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Affiliation(s)
- John Danziger
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Kenneth J. Mukamal
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Eric Weinhandl
- Chronic Disease Research Group, Hennepin Healthcare Research Institute, Minneapolis, Minnesota,Department of Pharmaceutical Care and Health Systems, University of Minnesota, Minneapolis, Minnesota
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Qing Y, Yang J, Zhu Y, Li Y, Zheng W, Wu M, He G. Dose-response evaluation of urinary cadmium and kidney injury biomarkers in Chinese residents and dietary limit standards. Environ Health 2021; 20:75. [PMID: 34193170 PMCID: PMC8247151 DOI: 10.1186/s12940-021-00760-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 06/18/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Cadmium (Cd) is a common heavy metal that mainly causes renal damage. There is a lack of research on the large-scale and systematic evaluation of the association between urinary Cd (U-Cd) and various effect biomarkers among Chinese residents. METHODS Based on the establishment process of dietary Cd limit standards by European Food Safety Authority (EFSA), the dose-response relationships between U-Cd and four biomarkers, β2-microglobulin (β2-MG), N-acetyl-β-glucosidase (NAG), microalbumin (mALB), and retinol binding Protein (RBP) were explored, respectively. Toxicokinetic model was used to derive the dietary Cd exposure limit for Chinese residents after critical U-Cd concentration was calculated. RESULTS As the sensitive biomarkers of renal injury, β2-MG and NAG were selected to estimate the 95% confidence interval lower limit of the U-Cd benchmark dose (BMDL5) to be 3.07 and 2.98 μg/g Cr, respectively. Dietary Cd exposure limit was calculated to be 0.28 μg/kg bw/day (16.8 μg/day, based on the body weight of 60 kg), which was lower than the average Chinese Cd exposure (30.6 μg/day) by the China National Nutrient and Health Survey. CONCLUSION This study established an overall association between U-Cd and renal injury biomarkers, and explored the Chinese dietary Cd exposure limits, which helps improve Chinese Cd exposure risk assessment and provides a reference basis for formulating reasonable exposure standards.
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Affiliation(s)
- Ying Qing
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Department of Nutrition and Food Science, Fudan University, No. 130 Dongan Road, Shanghai, 200032 China
| | - Jiaqi Yang
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Department of Nutrition and Food Science, Fudan University, No. 130 Dongan Road, Shanghai, 200032 China
| | - Yuanshen Zhu
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Department of Nutrition and Food Science, Fudan University, No. 130 Dongan Road, Shanghai, 200032 China
| | - Yongzhen Li
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Department of Nutrition and Food Science, Fudan University, No. 130 Dongan Road, Shanghai, 200032 China
| | - Weiwei Zheng
- Department of Environmental Health, School of Public Health, Fudan University, Shanghai, 200032 China
| | - Min Wu
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Department of Nutrition and Food Science, Fudan University, No. 130 Dongan Road, Shanghai, 200032 China
| | - Gengsheng He
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Department of Nutrition and Food Science, Fudan University, No. 130 Dongan Road, Shanghai, 200032 China
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AlMasoud N, Habila MA, Alothman ZA, Alomar TS, Alraqibah N, Sheikh M, Ghfar AA, Soylak M. Nano-clay as a solid phase microextractor of copper, cadmium and lead for ultra-trace quantification by ICP-MS. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:4949-4955. [PMID: 33025981 DOI: 10.1039/d0ay01343a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Heavy metal microextraction and determination in daily used water is accurately achieved by applying nano-clay as an extractor. The conditions for adsorption/elution of Cu(ii), Cd(ii) and Pb(ii) were investigated by adjusting the pH of samples, sample volume and the type of eluent. The nano-clay showed superior efficiency for microextraction of Cu(ii), Cd(ii) and Pb(ii) at pH 2 using 2 mL of nitric acid (1 M) as the eluent. The microextraction procedure showed high recovery% by changing the sample volume from 15 mL to 70 mL. The preconcentration factor was found to be 37.5. The LOD and LOQ were 1.8, 1.3, and 1.9 μg L-1 and 5.3, 3.9, and 5.7 μg L-1 for Cu(ii), Cd(ii) and Pb(ii) respectively. The addition/recovery from different water samples showed recovery% in the range 88-105 which confirms the efficiency and the accuracy of the developed solid phase microextraction using nano-clay for enrichment of Cu(ii), Cd(ii) and Pb(ii).
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Affiliation(s)
- Najla AlMasoud
- Department of Chemistry, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Kingdom of Saudi Arabia.
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Cai QL, Peng DJ, Lin-Zhao, Chen JW, Yong-Li, Luo HL, Ou SY, Huang ML, Jiang YM. Impact of Lead Exposure on Thyroid Status and IQ Performance among School-age Children Living Nearby a Lead-Zinc Mine in China. Neurotoxicology 2020; 82:177-185. [PMID: 33115663 DOI: 10.1016/j.neuro.2020.10.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 08/31/2020] [Accepted: 10/22/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Lead exposure is one of the most concerning public health problems worldwide, particularly among children. Yet the impact of chronic lead exposure on the thyroid status and related intelligence quotient performance among school-age children remained elusive. OBJECTIVE The aim of this study was to evaluate the influence of lead exposure on the thyroid hormones, amino acid neurotransmitters balances, and intelligence quotient (IQ) among school-age children living nearby a lead-zinc mining site. Other factors such as rice lead levels, mothers' smoking behavior, and diet intake were also investigated. METHODS A total of 255 children aged 7-12 years old were recruited in this study. Blood lead level (BLL), thyroid hormones including free triiodothyronine (FT3), free thyroxine (FT4) and thyroid stimulating hormone (TSH), and amino acid neurotransmitters such as glutamate (Glu), glutamine (Gln), and γ-aminobutyric acid (GABA) were measured using graphite furnace atomic absorption spectroscopy (GFAAS), chemiluminescence immunoassay, high performance liquid chromatography (HPLC). Raven's standard progressive matrices (SPM) and the questionnaire were used to determine IQ and collect related influence factors. RESULTS The average BLL of children was 84.8 μg/L. The occurrence of lead intoxication (defined as the BLL ≥ 100 μg/L) was 31.8%. Serum TSH levels and IQ of lead-intoxicated children were significantly lower than those without lead toxicity. The GABA level of girls with the lead intoxication was higher than those with no lead-exposed group. Correlation analyses revealed that BLL were inversely associated with the serum TSH levels (R= -0.186, p < 0.05), but positively related with IQ grades (R = 0.147, p < 0.05). Moreover, BLL and Glu were inversely correlated with IQ. In addition, this study revealed four factors that may contribute to the incidence of lead intoxication among children, including the frequency of mother smoking (OR = 3.587, p < 0.05) and drinking un-boiled stagnant tap water (OR = 3.716, p < 0.05); eating fresh fruits and vegetables (OR = 0.323, p < 0.05) and soy products regularly (OR = 0.181, p < 0.05) may protect against lead intoxication. CONCLUSION Lead exposure affects the serum TSH, GABA levels and IQ of school-aged children. Developing good living habits, improving environment, increasing the intake of high-quality protein and fresh vegetable and fruit may improve the condition of lead intoxication.
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Affiliation(s)
- Qiu-Ling Cai
- Department of Maternal, Child and Adolescent Health, School of Public Health, Guangxi Medical University, Nanning 530021, Guangxi, China; Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning 530021, Guangxi, China; Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning 530021, Guangxi, China
| | - Dong-Jie Peng
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning 530021, Guangxi, China
| | - Lin-Zhao
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning 530021, Guangxi, China
| | - Jing-Wen Chen
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning 530021, Guangxi, China; Public Health Office, Wuhan First Hospital, Hubei 430022, China
| | - Yong-Li
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning 530021, Guangxi, China; Wanzhou District Health Committee, Chongqing 404000, China
| | - Hai-Lan Luo
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning 530021, Guangxi, China; Guangxi Center for Disease Control and Prevention, Nanning 530021, Guangxi, China
| | - Shi-Yan Ou
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning 530021, Guangxi, China
| | - Ming-Li Huang
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning 530021, Guangxi, China
| | - Yue-Ming Jiang
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning 530021, Guangxi, China; Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning 530021, Guangxi, China.
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Dong Z, Ben Y, Li Y, Li T, Wan Y, Hu J. High inter-species differences of 12378-polychlorinated dibenzo-p-dioxin between humans and mice. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 265:114957. [PMID: 32554089 DOI: 10.1016/j.envpol.2020.114957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 05/27/2020] [Accepted: 06/03/2020] [Indexed: 06/11/2023]
Abstract
Although huge interspecies differences in the response to dioxins have been acknowledged, toxic equivalency factors derived from rodent studies are often used to assess human health risk. To determine interspecies differences, we first developed a toxicokinetic model in humans by measuring dioxin concentrations in environmental and biomonitoring samples from Southern China. Significant positive correlations between dioxin concentrations in blood and age were observed for seven dioxin congeners, indicating an age-dependent elimination rate. Based on toxicokinetic models in humans, the half-lives of 15 dioxin congeners were estimated to be 1.60-28.55 years. In consideration that the highest contribution to total toxic equivalency in blood samples was by 12378-polychlorinated dibenzo-p-dioxin (P5CDD), this study developed a physiologically based pharmacokinetic (PBPK) model of 12378-P5CDD levels in the liver, kidney, and fat of C57/6J mice exposed to a single oral dose, and the half-life was estimated to be 26.1 days. Based on estimated half-lives in humans and mice, we determined that the interspecies difference of 12378-P5CDD was 71, much higher than the default usually used in risk assessment. These results could reduce the uncertainty human risk assessment of 12378-P5CDD, and our approach could be used to estimate the interspecies differences of other dioxin congeners.
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Affiliation(s)
- Zhaomin Dong
- College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China; Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University, Beijing, 100191, China
| | - Yujie Ben
- College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China
| | - Yu Li
- College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China
| | - Tong Li
- College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China
| | - Yi Wan
- College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China
| | - Jianying Hu
- College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China.
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Wu Y, Lou J, Sun X, Ma LQ, Wang J, Li M, Sun H, Li H, Huang L. Linking elevated blood lead level in urban school-aged children with bioaccessible lead in neighborhood soil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 261:114093. [PMID: 32062095 DOI: 10.1016/j.envpol.2020.114093] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 12/19/2019] [Accepted: 01/28/2020] [Indexed: 06/10/2023]
Abstract
Lead (Pb) exposure is known to affect the health of children while soil Pb is an important contributor to human Pb exposure. To analyze the effects of both environmental and other factors, especially total and bioaccessible Pb in neighborhood soil, on school-aged urban children's blood lead level (BLL), 75 children (6-11 years old) were recruited from an industry city in eastern China for BLL measurement and questionnaire survey. Soil samples were collected from their living neighborhoods and measured for total and bioaccessible Pb. The mean BLL was 4.82 μg dL-1, with 42 out of 75 children having BLL exceeding the international guideline of 5 μg dL-1. Low Pb contamination was observed in soil with total Pb ranging from 12.5 to 271 mg kg-1 (mean 34.3 mg kg-1). Based on the in vitro Solubility Bioaccessibility Research Consortium (SBRC) gastric fluid extraction, bioaccessible Pb in soil ranged from 0.40 to 79.1 mg kg-1 (mean 7.58 mg kg-1) with Pb bioaccessibility ranging from 1.74 to 68.1 (mean 19.9%). When BLL was correlated with total Pb in soil, insignificant linear relationship was observed (P > 0.05, correlation coefficient 95%CI = -0.047-0.40, R2 = 0.07). However, when BLL was correlated with soil bioaccessible Pb or Pb bioaccessibility, much stronger linear relationships were observed (P < 0.01, correlation coefficient 95%CI = 0.28-0.64, R2 = 0.16-0.20), suggesting that bioaccessible Pb was a much stronger predictor of BLL. In addition, strong associations were also observed between BLL and social factors such as house decoration, residence time, and personal habits, suggesting that both soil Pb contamination and social factors play important roles in elevating BLL for city children.
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Affiliation(s)
- Yangyang Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, People's Republic of China
| | - Jianing Lou
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, People's Republic of China
| | - Xue Sun
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, People's Republic of China
| | - Lena Q Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, People's Republic of China
| | - Jueyang Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, People's Republic of China
| | - Mengya Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, People's Republic of China
| | - Hong Sun
- Jiangsu Province Center of Disease Control and Prevention, Nanjing 210009, People's Republic of China
| | - Hongbo Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, People's Republic of China.
| | - Lei Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, People's Republic of China.
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Yan Y, Yang S, Zhou Y, Song Y, Huang J, Liu Z, Wang Y, Wei S. Estimating the national burden of mild intellectual disability in children exposed to dietary lead in China. ENVIRONMENT INTERNATIONAL 2020; 137:105553. [PMID: 32086077 DOI: 10.1016/j.envint.2020.105553] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 01/13/2020] [Accepted: 02/04/2020] [Indexed: 06/10/2023]
Abstract
The effects of lead as a dietary pollutant remain a global public health concern that needs urgent resolution. Children are highly susceptible to the adverse outcomes of lead pollution, as even low levels of lead may cause irreversible damage to intellectual development. Since several sources of lead exposure are present in the environment, it is necessary to identify the attributable burden of lead-related diseases arising from different exposure sources. In the present study, we used epidemiological data from studies around the nation to estimate the burden of mild intellectual disability (MID) attributed to lead exposure sources by using disability-adjusted life years (DALYs). To this end, a dose-response approach was used and a model comprising three components was established: exposure, dose-response, and DALYs module. In Chinese children aged 0-6 years, blood lead levels (BLLs) of 5.34 ± 3.09 μg/dL resulted in a MID incidence rate of 12.84 cases per 1000 children, with an estimated burden of disease (BoD) of 42.23 DALYs per 1000 children. Owing to dietary lead exposure, 36.64 healthy life years per 1000 children were lost, which was notably higher than the outcomes associated with exposure from other sources. This was consistent with the result that dietary exposure was the main contributor to children's lead exposure, accounting for 86.76%. According to the regional distribution based on the existing literature, the areas in China with higher BLLs were Heilongjiang, Shanxi, and Jiangxi. Our findings provided the information for lead risk management decisions and policies making.
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Affiliation(s)
- Yizhong Yan
- School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Sulian Yang
- School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yujing Zhou
- School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yan Song
- National Food Safety Risk Assessment Center, Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 10022, China.
| | - Jiao Huang
- School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhaoping Liu
- National Food Safety Risk Assessment Center, Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 10022, China.
| | - Yibaina Wang
- National Food Safety Risk Assessment Center, Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 10022, China.
| | - Sheng Wei
- School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
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15
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Ranking Ecological Risk of Metals to Freshwater Organisms in Lake Taihu, China. J CHEM-NY 2020. [DOI: 10.1155/2020/2536207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Due to the persistence and the high toxicity of metals to many aquatic organisms, metals in aquatic ecosystems have attracted considerable attention. The objective of the present study was to rank metals in Lake Taihu based on the threat they pose to aquatic organisms. The method involved the assessment of the risks of metals to native aquatic organisms and the potential influence of concentration distributions. Both quotient and probabilistic methods were used to rank the risks of arsenic, cadmium, chromium, copper (Cu), mercury, manganese, nickel (Ni), lead, and zinc (Zn). Based on the probabilistic method, Cu, Ni, and Zn were the metals of great concern, with Cu posing the highest risk.
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Abstract
PURPOSE OF REVIEW Lead can enter drinking water from lead service lines and lead-containing plumbing, particularly in the presence of corrosive water. We review the current evidence on the role of drinking water as a source of lead exposure and its potential impacts on health, with an emphasis on children. Drinking water guidelines and mitigation strategies are also presented. RECENT FINDINGS The impact of lead on neurodevelopmental effects in children even at low levels of exposure is well established. Population and toxicokinetic modeling studies have found a clear relationship between water lead levels and blood lead levels in children at low levels of lead in drinking water. Various mitigation strategies can lower lead levels in water. The importance of drinking water as a contributor to total lead exposure depends on water lead levels and the amount consumed, as well as the relative contribution of other sources. Efforts should be made to reduce lead exposure for all sources, including drinking water, considering that no threshold level of exposure exists for the neurodevelopmental effects of lead in children.
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Kromerová K, Bencko V. Added value of human biomonitoring in assessment of general population exposure to xenobiotics. Cent Eur J Public Health 2019; 27:68-72. [DOI: 10.21101/cejph.a5348] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Indexed: 11/15/2022]
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Zhong B, Giubilato E, Critto A, Wang L, Marcomini A, Zhang J. Probabilistic modeling of aggregate lead exposure in children of urban China using an adapted IEUBK model. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 584-585:259-267. [PMID: 28187936 DOI: 10.1016/j.scitotenv.2016.11.164] [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: 09/16/2016] [Revised: 11/21/2016] [Accepted: 11/23/2016] [Indexed: 06/06/2023]
Abstract
Lead, a ubiquitous pollutant throughout the environment, is confirmed to be neurotoxic for children by pulmonary and oral routes. As preschool children in China continue to be exposed to lead, we analyzed the available biomonitoring data for preschool children in urban China collected in the period 2004-2014 through a literature review. To identify apportionment of lead exposure sources for urban children in China, we modified the IEUBK model with a Monte Carlo module to assess the uncertainty and variability of the model output based on limited available exposure data and compared the simulated blood lead levels with the observed ones obtained through literature review. Although children's blood lead levels in urban China decreased statistically over time for the included studies, changes in blood lead levels in three economic zones and seven age groups except for two age-specific groups were no longer significant. The GM-predicted BLLs and the GM-observed BLLs agreed within 1μg/dL for all fourteen cities. The 95% CIs for the predicted GMs and the observed distribution (GM±GSD) overlapped substantially. These results demonstrated the plausibility of blood lead prediction provided by the adapted IEUBK model. Lead exposure estimates for diet, soil/dust, air, and drinking water were 12.01±6.27μg/day, 2.69±0.89μg/day, 0.20±0.15μg/day, and 0.029±0.012μg/day, respectively. These findings showed that the reduction of lead concentrations in grains and vegetables would be beneficial to limit the risk of dietary lead exposure for a large proportion of preschool children in urban China.
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Affiliation(s)
- Buqing Zhong
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Elisa Giubilato
- Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari Venice, Via Torino 155, 30172 Mestre, Venice, Italy.
| | - Andrea Critto
- Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari Venice, Via Torino 155, 30172 Mestre, Venice, Italy.
| | - Lingqing Wang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
| | - Antonio Marcomini
- Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari Venice, Via Torino 155, 30172 Mestre, Venice, Italy.
| | - Jinliang Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
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Liu C, Li Y, Zhu C, Dong Z, Zhang K, Zhao Y, Xu Y. Benchmark dose for cadmium exposure and elevated N-acetyl-β-D-glucosaminidase: a meta-analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:20528-20538. [PMID: 27464656 DOI: 10.1007/s11356-016-7214-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 07/08/2016] [Indexed: 06/06/2023]
Abstract
Cadmium (Cd) is a well-known nephrotoxic contaminant, and N-acetyl-β-D-glucosaminidase (NAG) is considered to be an early and sensitive marker of tubular dysfunction. The link between Cd exposure and NAG level enables us to derive the benchmark dose (BMD) of Cd. Although several reports have already documented urinary Cd (UCd)-NAG relationships and BMD estimations, high heterogeneities arise due to the sub-populations (age, gender, and ethnicity) and BMD methodologies being employed. To clarify the influences that these variables exert, firstly, a random effect meta-analysis was performed in this study to correlate the UCd and NAG based on 92 datasets collected from 30 publications. Later, this established correlation (Ln(NAG) = 0.51 × Ln(UCd) + 0.83) was applied to derive the UCd BMD5 of 1.76 μg/g creatinine and 95 % lower confidence limit of BMD5 (BMDL5) of 1.67 μg/g creatinine. While the regressions for different age groups and genders differed slightly, it is age and not gender that significantly affects BMD estimations. Ethnic differences may require further investigation given that limited data is currently available. Based on a comprehensive and systematic literature review, this study is a new attempt to quantify the UCd-NAG link and estimate BMD.
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Affiliation(s)
- CuiXia Liu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Mawson Lakes, 5095, SA, Australia
| | - YuBiao Li
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, Hubei, China
| | - ChunShui Zhu
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Mawson Lakes, 5095, SA, Australia
- School of Chemical Engineering, Huaihai Institute of Technology, LianYungang, 222005, JiangSu, China
| | - ZhaoMin Dong
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Mawson Lakes, 5095, SA, Australia.
- Global Centre for Environmental Remediation, the Faculty of Science and Information Technology, University of Newcastle, University Drive, Newcastle, NSW, 2308, Australia.
- ATC Building, Global Center for Environmental Remediation, the Faculty of Science and Information Technology, University of Newcastle, Newcastle, 2308, NSW, Australia.
| | - Kun Zhang
- School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Gründenstrasse 40, CH-4132, Muttenz, Switzerland
| | - YanBin Zhao
- School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Gründenstrasse 40, CH-4132, Muttenz, Switzerland
| | - YiLu Xu
- Global Centre for Environmental Remediation, the Faculty of Science and Information Technology, University of Newcastle, University Drive, Newcastle, NSW, 2308, Australia
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Dong Z, Liu C, Liu Y, Yan K, Semple KT, Naidu R. Using publicly available data, a physiologically-based pharmacokinetic model and Bayesian simulation to improve arsenic non-cancer dose-response. ENVIRONMENT INTERNATIONAL 2016; 92-93:239-246. [PMID: 27107229 DOI: 10.1016/j.envint.2016.03.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/22/2016] [Accepted: 03/25/2016] [Indexed: 06/05/2023]
Abstract
Publicly available data can potentially examine the relationship between environmental exposure and public health, however, it has not yet been widely applied. Arsenic is of environmental concern, and previous studies mathematically parameterized exposure duration to create a link between duration of exposure and increase in risk. However, since the dose metric emerging from exposure duration is not a linear or explicit variable, it is difficult to address the effects of exposure duration simply by using mathematical functions. To relate cumulative dose metric to public health requires a lifetime physiologically-based pharmacokinetic (PBPK) model, yet this model is not available at a population level. In this study, the data from the U.S. total diet study (TDS, 2006-2011) was employed to assess exposure: daily dietary intakes for total arsenic (tAs) and inorganic arsenic (iAs) were estimated to be 0.15 and 0.028μg/kg/day, respectively. Meanwhile, using National Health and Nutrition Examination Survey (NHANES, 2011-2012) data, the fraction of urinary As(III) levels (geometric mean: 0.31μg/L) in tAs (geometric mean: 7.75μg/L) was firstly reported to be approximately 4%. Together with Bayesian technique, the assessed exposure and urinary As(III) concentration were input to successfully optimize a lifetime population PBPK model. Finally, this optimized PBPK model was used to derive an oral reference dose (Rfd) of 0.8μg/kg/day for iAs exposure. Our study also suggests the previous approach (by using mathematical functions to account for exposure duration) may result in a conservative Rfd estimation.
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Affiliation(s)
- Zhaomin Dong
- Global Centre for Environmental Remediation, Faculty of Science and Information Technology, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Mawson Lakes, SA 5095, Australia
| | - CuiXia Liu
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Mawson Lakes, SA 5095, Australia; School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yanju Liu
- Global Centre for Environmental Remediation, Faculty of Science and Information Technology, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Mawson Lakes, SA 5095, Australia
| | - Kaihong Yan
- Global Centre for Environmental Remediation, Faculty of Science and Information Technology, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Mawson Lakes, SA 5095, Australia
| | - Kirk T Semple
- Lancaster Environment Centre, Lancaster University, LA1 4YQ Lancaster, United Kingdom
| | - Ravi Naidu
- Global Centre for Environmental Remediation, Faculty of Science and Information Technology, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Mawson Lakes, SA 5095, Australia.
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Zhao D, Li J, Li C, Juhasz AL, Scheckel KG, Luo J, Li HB, Ma LQ. Lead Relative Bioavailability in Lip Products and Their Potential Health Risk to Women. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:6036-43. [PMID: 27187630 DOI: 10.1021/acs.est.6b01425] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Recent studies have investigated lead (Pb) concentrations in lip products but little is known about its oral bioavailability. In this study, 75 lipsticks and 18 lip glosses were assessed for Pb concentration, while 15 samples were assessed for Pb relative bioavailability (RBA, relative to Pb acetate absorption) using a mouse femur assay. Lead concentrations were 0.2-10 185 mg kg(-1), with 21 samples exceeding the Chinese limit of 40 mg kg(-1). Samples with orange and pink colors and/or low cost contained higher Pb concentrations. For samples with Pb > 7500 mg kg(-1), Pb was present due to the addition of lead chromate (PbCrO4) as a colorant, which was confirmed by X-ray absorption near-edge structure analysis. Lead-RBA in 15 samples (87-10 185 mg kg(-1)) ranged from 23% to 95%, being significantly higher in moderate Pb (56-95%; 87-300 mg kg(-1)) than high Pb samples (23-48%; >300 mg kg(-1)). The calculation of Pb intake based on Pb-RBA showed that lip product ingestion contributed 5.4-68% of the aggregate Pb exposure for women depending on Pb concentration. The high Pb concentration in some lip products together with their moderate Pb-RBA suggests that lip product ingestion is a potential health concern to women.
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Affiliation(s)
- Di Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing, Jiangsu, 210046, People's Republic of China
| | - Jie Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing, Jiangsu, 210046, People's Republic of China
| | - Chao Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing, Jiangsu, 210046, People's Republic of China
| | - Albert L Juhasz
- Future Industries Institute, University of South Australia , Mawson Lakes, Adelaide, South Australia 5095, Australia
| | - Kirk G Scheckel
- U.S. Environmental Protection Agency , National Risk Management Research Laboratory, Land Remediation and Pollution Control Division, Cincinnati, Ohio 45224-1701, United States
| | - Jun Luo
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing, Jiangsu, 210046, People's Republic of China
| | - Hong-Bo Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing, Jiangsu, 210046, People's Republic of China
| | - Lena Q Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing, Jiangsu, 210046, People's Republic of China
- Soil and Water Science Department, University of Florida , Gainesville, Florida 32611, United States
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Yu Y, Li Q, Wang H, Wang B, Lu Q, Yan Z, Ding A. Exposure risk of young population to lead: A case study in Le'an River Basin in Jiangxi Province, China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 209:140-6. [PMID: 26681548 DOI: 10.1016/j.envpol.2015.11.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 11/10/2015] [Accepted: 11/13/2015] [Indexed: 05/26/2023]
Abstract
Blood lead (Pb) level of children has widely been attracting public concern in China, particularly in the sites near mining or industrial areas. However, the policies about how to efficiently reduce the Pb intake of children are still under discussion. We collected six food types based on the local dietary habits and soils from Dexing, Leping, and Poyang Counties situated along the Le'an River Basin from upstream to downstream, and their Pb contents were analyzed. A Monte Carlo model was used to simulate the dietary chronic daily intake of Pb (CDIPb) from various foods and ingested soil by hand-to-mouth activities and its non-carcinogenic risk to children indicated by hazard quotient (HQ). Only in the rural area of Dexing, its soil and vegetables both had higher Pb content than the national tolerance limits of China, resulting its the highest CDIPb among all the areas. The Pb contents of the six food types and soils in other sites were overall below the limits. Vegetables and rice accounted for from 63% (Leping, urban) to 85% (Dexing, rural) of the total CDIPb and ingested soil overall took up ∼6%. In the rural area, Dexing had the highest proportion (82.8%) of children with HQ > 1, followed by Leping (36.1%) and Poyang (27.7%). Different order was found in the urban areas, i.e. Dexing (46.7%) > Poyang (41.0%) > Leping (26.4%). Vegetables and rice were overall the two major contributors to the total CDI of Pb, which should be focused on to control the Pb intake by the local children, especially for those living in the rural area of Dexing County.
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Affiliation(s)
- Yanxin Yu
- College of Water Science, Beijing Normal University, Beijing 100875, PR China.
| | - Qi Li
- College of Water Science, Beijing Normal University, Beijing 100875, PR China
| | - Hui Wang
- College of Water Science, Beijing Normal University, Beijing 100875, PR China
| | - Bin Wang
- Institute of Reproductive and Child Health, Ministry of Health Key Laboratory of Reproductive Health, School of Public Health, Peking University, Beijing 100191, PR China
| | - Qun Lu
- Reproductive Medical Center, Peking University People's Hospital, Beijing 100044, PR China
| | - Zhenghong Yan
- College of Water Science, Beijing Normal University, Beijing 100875, PR China
| | - Aizhong Ding
- College of Water Science, Beijing Normal University, Beijing 100875, PR China
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23
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Dong Z, Liu Y, Duan L, Bekele D, Naidu R. Uncertainties in human health risk assessment of environmental contaminants: A review and perspective. ENVIRONMENT INTERNATIONAL 2015; 85:120-32. [PMID: 26386465 DOI: 10.1016/j.envint.2015.09.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 08/31/2015] [Accepted: 09/02/2015] [Indexed: 05/24/2023]
Abstract
Addressing uncertainties in human health risk assessment is a critical issue when evaluating the effects of contaminants on public health. A range of uncertainties exist through the source-to-outcome continuum, including exposure assessment, hazard and risk characterisation. While various strategies have been applied to characterising uncertainty, classical approaches largely rely on how to maximise the available resources. Expert judgement, defaults and tools for characterising quantitative uncertainty attempt to fill the gap between data and regulation requirements. The experiences of researching 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) illustrated uncertainty sources and how to maximise available information to determine uncertainties, and thereby provide an 'adequate' protection to contaminant exposure. As regulatory requirements and recurring issues increase, the assessment of complex scenarios involving a large number of chemicals requires more sophisticated tools. Recent advances in exposure and toxicology science provide a large data set for environmental contaminants and public health. In particular, biomonitoring information, in vitro data streams and computational toxicology are the crucial factors in the NexGen risk assessment, as well as uncertainties minimisation. Although in this review we cannot yet predict how the exposure science and modern toxicology will develop in the long-term, current techniques from emerging science can be integrated to improve decision-making.
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Affiliation(s)
- Zhaomin Dong
- The Faculty of Science and Information Technology, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, Mawson Lakes, SA 5095, Australia
| | - Yanju Liu
- The Faculty of Science and Information Technology, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, Mawson Lakes, SA 5095, Australia
| | - Luchun Duan
- The Faculty of Science and Information Technology, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, Mawson Lakes, SA 5095, Australia
| | - Dawit Bekele
- The Faculty of Science and Information Technology, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, Mawson Lakes, SA 5095, Australia
| | - Ravi Naidu
- The Faculty of Science and Information Technology, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, Mawson Lakes, SA 5095, Australia.
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24
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Smolders R, Den Hond E, Koppen G, Govarts E, Willems H, Casteleyn L, Kolossa-Gehring M, Fiddicke U, Castaño A, Koch HM, Angerer J, Esteban M, Sepai O, Exley K, Bloemen L, Horvat M, Knudsen LE, Joas A, Joas R, Biot P, Aerts D, Katsonouri A, Hadjipanayis A, Cerna M, Krskova A, Schwedler G, Seiwert M, Nielsen JKS, Rudnai P, Közepesy S, Evans DS, Ryan MP, Gutleb AC, Fischer ME, Ligocka D, Jakubowski M, Reis MF, Namorado S, Lupsa IR, Gurzau AE, Halzlova K, Fabianova E, Mazej D, Tratnik Snoj J, Gomez S, González S, Berglund M, Larsson K, Lehmann A, Crettaz P, Schoeters G. Interpreting biomarker data from the COPHES/DEMOCOPHES twin projects: Using external exposure data to understand biomarker differences among countries. ENVIRONMENTAL RESEARCH 2015; 141:86-95. [PMID: 25440294 DOI: 10.1016/j.envres.2014.08.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 08/13/2014] [Accepted: 08/14/2014] [Indexed: 06/04/2023]
Abstract
In 2011 and 2012, the COPHES/DEMOCOPHES twin projects performed the first ever harmonized human biomonitoring survey in 17 European countries. In more than 1800 mother-child pairs, individual lifestyle data were collected and cadmium, cotinine and certain phthalate metabolites were measured in urine. Total mercury was determined in hair samples. While the main goal of the COPHES/DEMOCOPHES twin projects was to develop and test harmonized protocols and procedures, the goal of the current paper is to investigate whether the observed differences in biomarker values among the countries implementing DEMOCOPHES can be interpreted using information from external databases on environmental quality and lifestyle. In general, 13 countries having implemented DEMOCOPHES provided high-quality data from external sources that were relevant for interpretation purposes. However, some data were not available for reporting or were not in line with predefined specifications. Therefore, only part of the external information could be included in the statistical analyses. Nonetheless, there was a highly significant correlation between national levels of fish consumption and mercury in hair, the strength of antismoking legislation was significantly related to urinary cotinine levels, and we were able to show indications that also urinary cadmium levels were associated with environmental quality and food quality. These results again show the potential of biomonitoring data to provide added value for (the evaluation of) evidence-informed policy making.
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Affiliation(s)
- R Smolders
- Flemish Institute of Technological Research (VITO), Environmental Risks and Health Unit, Boeretang 200, 2400 Mol, Belgium.
| | - E Den Hond
- Flemish Institute of Technological Research (VITO), Environmental Risks and Health Unit, Boeretang 200, 2400 Mol, Belgium
| | - G Koppen
- Flemish Institute of Technological Research (VITO), Environmental Risks and Health Unit, Boeretang 200, 2400 Mol, Belgium
| | - E Govarts
- Flemish Institute of Technological Research (VITO), Environmental Risks and Health Unit, Boeretang 200, 2400 Mol, Belgium
| | - H Willems
- Flemish Institute of Technological Research (VITO), Environmental Risks and Health Unit, Boeretang 200, 2400 Mol, Belgium
| | | | | | - U Fiddicke
- Federal Environment Agency (UBA), Germany
| | - A Castaño
- Instituto de Salud Carlos III, Spain
| | - H M Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr-Universität Bochum (IPA), Germany
| | - J Angerer
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr-Universität Bochum (IPA), Germany
| | - M Esteban
- Instituto de Salud Carlos III, Spain
| | - O Sepai
- Public Health England, United Kingdom
| | - K Exley
- Public Health England, United Kingdom
| | - L Bloemen
- Environmental Health Sciences International, The Netherlands
| | - M Horvat
- Jožef Stefan Institute, Slovenia
| | | | | | | | - P Biot
- FPS Health, Food Chain Safety and Environment, Belgium
| | - D Aerts
- FPS Health, Food Chain Safety and Environment, Belgium
| | - A Katsonouri
- State General Laboratory, Ministry of Health, Cyprus
| | | | - M Cerna
- National Institute of Public Health, Czech Republic
| | - A Krskova
- National Institute of Public Health, Czech Republic
| | | | - M Seiwert
- Federal Environment Agency (UBA), Germany
| | | | - P Rudnai
- National Institute of Environmental Health, Hungary
| | - S Közepesy
- National Institute of Environmental Health, Hungary
| | - D S Evans
- Health Service Executive (HSE), Ireland
| | - M P Ryan
- University College Dublin (UCD), Ireland
| | - A C Gutleb
- Centre de Recherche Public - Gabriel Lippmann, Luxembourg
| | | | - D Ligocka
- Nofer Institute of Occupational Medicine, Poland
| | - M Jakubowski
- Nofer Institute of Occupational Medicine, Poland
| | - M F Reis
- Faculdade de Medicina de Lisboa, Portugal
| | - S Namorado
- Faculdade de Medicina de Lisboa, Portugal
| | - I-R Lupsa
- Environmental Health Center, Romania
| | | | - K Halzlova
- Úrad verejného zdravotníctva Slovenskej republiky, Slovakia
| | - E Fabianova
- Úrad verejného zdravotníctva Slovenskej republiky, Slovakia
| | - D Mazej
- Jožef Stefan Institute, Slovenia
| | | | - S Gomez
- Instituto de Salud Carlos III, Spain
| | | | | | | | - A Lehmann
- Federal Office of Public Health (FOPH), Switzerland
| | - P Crettaz
- Federal Office of Public Health (FOPH), Switzerland
| | - G Schoeters
- Flemish Institute of Technological Research (VITO), Environmental Risks and Health Unit, Boeretang 200, 2400 Mol, Belgium; University of Antwerp, Belgium; Southern Denmark University, Odense, Denmark
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25
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Lu L, Cheng H, Liu X, Xie J, Li Q, Zhou T. Assessment of regional human health risks from lead contamination in Yunnan province, southwestern China. PLoS One 2015; 10:e0119562. [PMID: 25893826 PMCID: PMC4404351 DOI: 10.1371/journal.pone.0119562] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 01/14/2015] [Indexed: 11/25/2022] Open
Abstract
Identification and management the 'critical risk areas' where hotspot lead exposures are a potential risk to human health, become a major focus of public health efforts in China. But the knowledge of health risk assessment of lead pollution at regional and national scales is still limited in China. In this paper, under the guidance of 'sources-pathways-receptors' framework, regional human health risk assessment model for lead contamination was developed to calculate the population health risk in Yunnan province. And the cluster and AHP (analytic hierarchy process) analysis was taken to classify and calculate regional health risk and the decomposition of the regional health risk in the greatest health risk region, respectively. The results showed that Yunnan province can be divided into three areas. The highest health risk levels, located in northeastern Yunnan, including Kunming, Qujing, Zhaotong region. In those regions, lead is present at high levels in air, food, water and soil, and high population density which pose a high potential population risk to the public. The current study also reveals that most regional health risk was derived from the child receptors (age above 3 years) 4.3 times than the child receptors (age under 3 years), and ingestion of lead-contaminated rice was found to be the most significant contributor to the health risk (accounting for more than 49% health risk of total). This study can provide a framework for regional risk assessment in China and highlighted some indicators and uncertainties.
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Affiliation(s)
- Lu Lu
- School of Environment, Beijing Normal University, Beijing 100875, China
| | - Hongguang Cheng
- School of Environment, Beijing Normal University, Beijing 100875, China
| | - Xuelian Liu
- School of Environment, Beijing Normal University, Beijing 100875, China
| | - Jing Xie
- School of Environment, Beijing Normal University, Beijing 100875, China
| | - Qian Li
- Shandong Institute of Standardization, Standardization Technical Research Centre, Jinan city, Shandong province, China
| | - Tan Zhou
- Spatial Science Laboratory, Texas A&M University, College Station, Texas, United States of America
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26
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Cao S, Duan X, Zhao X, Wang B, Ma J, Fan D, Sun C, He B, Wei F, Jiang G. Isotopic ratio based source apportionment of children's blood lead around coking plant area. ENVIRONMENT INTERNATIONAL 2014; 73:158-166. [PMID: 25124751 DOI: 10.1016/j.envint.2014.07.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 04/23/2014] [Accepted: 07/09/2014] [Indexed: 06/03/2023]
Abstract
Lead exposure in the environment is a major hazard affecting human health, particularly for children. The blood lead levels in the local children living around the largest coking area in China were measured, and the source of blood lead and the main pathways of lead exposure were investigated based on lead isotopic ratios ((207)Pb/(206)Pb and (208)Pb/(206)Pb) in blood and in a variety of media, including food, airborne particulate matter, soil, dust and drinking water. The children's blood lead level was 5.25 (1.59 to 34.36 as range) μg dL(-1), lower than the threshold in the current criteria of China defined by the US Centers for Disease Control (10 μg dL(-1)). The isotopic ratios in the blood were 2.111±0.018 for (208)Pb/(206)Pb and 0.864±0.005 for (207)Pb/(206)Pb, similar to those of vegetables, wheat, drinking water, airborne particulate matter, but different from those of vehicle emission and soil/dust, suggesting that the formers were the main pathway of lead exposure among the children. The exposure pathway analysis based on the isotopic ratios and the human health risk assessment showed that dietary intake of food and drinking water contributed 93.67% of total exposed lead. The study further indicated that the coal used in the coking plant is the dominant pollution source of lead in children's blood.
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Affiliation(s)
- Suzhen Cao
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Xiaoli Duan
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Xiuge Zhao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Beibei Wang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Jin Ma
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Delong Fan
- School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Chengye Sun
- National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Bin He
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Fusheng Wei
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; China National Environmental Monitoring Center, Beijing 100012, China.
| | - Guibin Jiang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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27
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Hu Y, Song X, Gong X, Xu Y, Liu H, Deng X, Ru S. Risk assessment of butyltins based on a fugacity-based food web bioaccumulation model in the Jincheng Bay mariculture area: II. Risk assessment. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2014; 16:2002-2006. [PMID: 24947127 DOI: 10.1039/c4em00240g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A fugacity-based food web bioaccumulation model was constructed, and the biotic concentrations of butyltins in the food web of the Jincheng Bay mariculture area were estimated accordingly, using the water and sediment concentrations described in the accompanying paper (Part I). This paper presents an ecological risk assessment (ERA) and a human health risk assessment (HHRA) of the butyltins, based on the estimated tissue residues in the marine life in this area. The results showed that the ecological risk probability was greater than 0.05. At this level, management control is critical since sensitive marine species would be profoundly endangered by butyltin contamination. Few if any detrimental effects, however, would be generated for humans from exposure to butyltins through seafood consumption. The fugacity-based model can refine the ERA and HHRA of pollutants in marine areas, provide a basis for protecting marine ecology and the security of fishery products, and thus help determine the feasibility of a proposed aquaculture project.
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Affiliation(s)
- Yanbing Hu
- College of Marine Life Sciences, Ocean University of China, No.5 of Yushan Road, Qingdao 266003, China.
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28
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Zhuang P, Lu H, Li Z, Zou B, McBride MB. Multiple exposure and effects assessment of heavy metals in the population near mining area in South China. PLoS One 2014; 9:e94484. [PMID: 24728502 PMCID: PMC3984172 DOI: 10.1371/journal.pone.0094484] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2014] [Accepted: 03/17/2014] [Indexed: 11/26/2022] Open
Abstract
The objective of this study was to investigate the levels of Cd, Pb, Cu and Zn in the environment and several important food sources grown and consumed in the vicinity of Dabaoshan mine in Southern China, and evaluate potential health risks among local residents. The Cd, Pb, Cu and Zn concentrations of arable soils and well water near the mines exceeded the quality standard values. The concentrations of Cd and Pb in some food crops (rice grain, vegetable and soybean) samples were significantly higher than the maximum permissible level. The Cd and Pb concentrations in half of the chicken and fish meat samples were higher than the national standard. The residents living near Dabaoshan mine had higher Cd and Pb levels in hair than those of a non-exposed population. The intake of rice was identified as a major contributor to the estimated daily intake of these metals by the residents. The hazard index values for adults and children were 10.25 and 11.11, respectively, with most of the estimated risks coming from the intake of home-grown rice and vegetables. This study highlights the importance of multiple pathways in studying health risk assessment of heavy metal exposure in China.
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Affiliation(s)
- Ping Zhuang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Huanping Lu
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Zhian Li
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Bi Zou
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Murray B. McBride
- Department of Crop and Soil Sciences, Cornell University, Ithaca, New York, United States of America
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29
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Zheng J, Huynh T, Gasparon M, Ng J, Noller B. Human health risk assessment of lead from mining activities at semi-arid locations in the context of total lead exposure. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:8404-16. [PMID: 24122159 DOI: 10.1007/s11356-013-2145-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Accepted: 09/09/2013] [Indexed: 05/24/2023]
Abstract
Lead from historical mining and mineral processing activities may pose potential human health risks if materials with high concentrations of bioavailable lead minerals are released to the environment. Since the Joint Expert Committee on Food Additives of Food and Agriculture Organization/World Health Organization withdrew the Provisional Tolerable Weekly Intake of lead in 2011, an alternative method was required for lead exposure assessment. This study evaluated the potential lead hazard to young children (0-7 years) from a historical mining location at a semi-arid area using the U.S. EPA Integrated Exposure Uptake Biokinetic (IEUBK) Model, with selected site-specific input data. This study assessed lead exposure via the inhalation pathway for children living in a location affected by lead mining activities and with specific reference to semi-arid conditions and made comparison with the ingestion pathway by using the physiologically based extraction test for gastro-intestinal simulation. Sensitivity analysis for major IEUBK input parameters was conducted. Three groups of input parameters were classified according to the results of predicted blood concentrations. The modelled lead absorption attributed to the inhalation route was lower than 2 % (mean ± SE, 0.9 % ± 0.1 %) of all lead intake routes and was demonstrated as a less significant exposure pathway to children's blood, compared with ingestion. Whilst dermal exposure was negligible, diet and ingestion of soil and dust were the dominant parameters in terms of children's blood lead prediction. The exposure assessment identified the changing role of dietary intake when house lead loadings varied. Recommendations were also made to conduct comprehensive site-specific human health risk assessment in future studies of lead exposure under a semi-arid climate.
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30
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Nieboer E, Tsuji LJS, Martin ID, Liberda EN. Human biomonitoring issues related to lead exposure. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2013; 15:1824-1829. [PMID: 23970117 DOI: 10.1039/c3em00270e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Lead as a toxic environmental metal has been an issue of concern for 30-40 years. Even though the exposures experienced by the general public have been significantly reduced, so have the acceptable blood lead concentrations assessed to safeguard health (specifically of children). The impact of these concurrent changes are reviewed and discussed in terms of the following: blood lead as the primary biomarker of exposure; pertinent toxicokinetic issues including modelling; legacy and newer sources of this toxic metal; improvements in lead quantification techniques and its characterization (chemical forms) in exposure media; and in vivo markers of lead sources. It is concluded that the progress in the quantification of lead and its characterization in exposure media have supported the efforts to identify statistical associations of lead in blood and tissues with adverse health outcomes, and have guided strategies to reduce human exposure (especially for children). To clarify the role of lead as a causative factor in disease, greater research efforts in biomarkers of effect and susceptibility seem timely.
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Affiliation(s)
- Evert Nieboer
- Department of Biochemistry and Biomedical Sciences, McMaster University, 1280 Main Street West, HSC 4N59, Hamilton, ON L8S 4K1, Canada.
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31
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Wan Y, Zhang K, Dong Z, Hu J. Distribution is a major factor affecting bioaccumulation of decabrominated diphenyl ether: Chinese sturgeon (Acipenser sinensis) as an example. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:2279-86. [PMID: 23387833 DOI: 10.1021/es304926r] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
While decabromodiphenyl ether (BDE-209) has very low bioavailability and a rapid biotransformation rate, it exhibits high bioaccumulation in wildlife. To explore the bioaccumulation mechanism of BDE-209 in organisms, its toxicokinetic processes were investigated in Chinese sturgeons from the Yangtze River. Different from less brominated BDEs, lipids did not play an important role in the distribution of BDE-209 with relatively high concentrations detected in liver (54.5 ± 3.3 ng/g wet weight (ww)), gills (47.4 ± 2.9 ng/g ww), and intestine (41.9 ± 3.0 ng/g ww), followed by stomach (21.9 ± 9.0 ng/g ww), muscle (19.1 ± 5.6 ng/g ww), heart (7.5 ± 5.2 ng/g ww), gonad (6.8 ± 4.9 ng/g ww), adipose (4.9 ± 1.2 ng/g ww), and egg (2.8 ± 2.3 ng/g ww). In vitro metabolism of BDE-209 by microsomal fractions of Chinese sturgeon found that BDE-209 was biotransformed rapidly with the rate constant (K) of 0.039 h(-1) in liver. BDE-126, BDE-154, BDE-188, BDE-184, BDE-183, BDE-202, BDE-201, and BDE-204/197 were observed as debrominated products of BDE-209 after incubation, and their formation rates were 0.026, 0.016, and 0.006 h(-1) for BDE-126 BDE-184, and BDE-154, respectively. The concentration ratios between heart and intestine for individual PBDEs suggested slow delivery of BDE-209 among tissues after absorption. A Bayesian hierarchical model was further developed to estimate partition coefficients in a physiologically based pharmacokinetic model of BDE-209 in Chinese sturgeon. The estimated partition coefficients between tissues and blood were higher than those of less brominated BDE or PCBs in various animals, suggesting that the low partition ratios from blood to tissues would lead to high bioaccumulation of BDE-209, especially in absorbing organs.
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Affiliation(s)
- Yi Wan
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University , Beijing 100871, People's Republic of China
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32
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Qu CS, Ma ZW, Yang J, Liu Y, Bi J, Huang L. Human exposure pathways of heavy metals in a lead-zinc mining area, Jiangsu Province, China. PLoS One 2012; 7:e46793. [PMID: 23152752 PMCID: PMC3496726 DOI: 10.1371/journal.pone.0046793] [Citation(s) in RCA: 143] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2012] [Accepted: 09/05/2012] [Indexed: 11/18/2022] Open
Abstract
Heavy metal pollution is becoming a serious issue in developing countries such as China, and the public is increasingly aware of its adverse health impacts in recent years. We assessed the potential health risks in a lead-zinc mining area and attempted to identify the key exposure pathways. We evaluated the spatial distributions of personal exposure using indigenous exposure factors and field monitoring results of water, soil, food, and indoor and outdoor air samples. The risks posed by 10 metals and the contribution of inhalation, ingestion and dermal contact pathways to these risks were estimated. Human hair samples were also analyzed to indicate the exposure level in the human body. Our results show that heavy metal pollution may pose high potential health risks to local residents, especially in the village closest to the mine (V1), mainly due to Pb, Cd and Hg. Correspondingly, the residents in V1 had higher Pb (8.14 mg/kg) levels in hair than those in the other two villages. Most of the estimated risks came from soil, the intake of self-produced vegetables and indoor air inhalation. This study highlights the importance of site-specific multipathway health risk assessments in studying heavy-metal exposures in China.
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Affiliation(s)
- Chang-Sheng Qu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, China
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