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Effects of soil particle size on metal bioaccessibility and health risk assessment.
Ecotoxicol Environ Saf. 2019 Dec 30; 186:109748.EE

Abstract

Oral ingestion is the main exposure pathway through which humans ingest trace metals in the soil, particularly for children. Metals in different soil particle size fractions may vary in terms of concentration and properties. Urban school/kindergarten soil samples were collected from three cities: Lanzhou in northwest China, Wuhan in central China, and Shenzhen in southeast China. Soil samples were classified according to particle size (<63 μm, 63-150 μm, 150-250 μm, and 250-2000 μm) to estimate the effects of soil particle size on the total content and bioaccessibility of metals (Cd, Cr, Cu, Ni, Pb, and Zn). Based on the results, we assessed whether the standard size <150 μm (containing < 63 μm and 63-150 μm), recommended by the Technical Review Workgroup (TRW) of the Environmental Protection Agency (EPA), and <250 μm (containing < 63 μm, 63-150 μm, and 150-250) recommended by the Bioaccessibility Research Group of Europe (BARGE), are suitable where the largest proportion adhering to hands is the finest soil (<63 μm). The results showed that different metals exhibited different relationships between soil particle size and content and between soil particle size and bioaccessibility. Pb and Zn generally exhibited the greatest bioaccessibility in the coarsest particle sizes (250-2000 μm); whereas the highest Ni bioaccessibility occurred in the finest sizes (<63 μm); the bioaccessibility of other metals did not exhibit any obvious relationships with particle size. When assessing health risks using bioaccessible metal content in the recommended soil particle size ranges (<150 μm and <250 μm) and in finer particles (<63 μm), the results for noncarcinogenic risks to children exhibited no obvious difference, while the actual carcinogenic risks may be underestimated with the use of soil particle size ranges < 150 μm and <250 μm. Therefore, when choosing an optimal particle size fraction to evaluate the health risk of oral soil ingestion, we recommend the use of the bioaccessible metal content in <63 μm soil fraction.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Ma J
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19 Xinjiekouwai Street, HaiDian District, Beijing, 100875, PR China. Electronic address: jwma@bnu.edu.cn.
Li Y
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19 Xinjiekouwai Street, HaiDian District, Beijing, 100875, PR China. Electronic address: liyuqian_liyq@163.com.
Liu Y
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19 Xinjiekouwai Street, HaiDian District, Beijing, 100875, PR China. Electronic address: yzliu200806522@163.com.
Lin C
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19 Xinjiekouwai Street, HaiDian District, Beijing, 100875, PR China. Electronic address: c.lin@bnu.edu.cn.
Cheng H
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19 Xinjiekouwai Street, HaiDian District, Beijing, 100875, PR China. Electronic address: chg@bnu.edu.cn.

MeSH

Biological AvailabilityChildChild HealthChinaCitiesEnvironmental MonitoringEuropeHumansMetals, HeavyNeoplasmsParticle SizeRisk AssessmentSoilSoil PollutantsTrace Elements

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31606640

Citation

Ma, Junwei, et al. "Effects of Soil Particle Size On Metal Bioaccessibility and Health Risk Assessment." Ecotoxicology and Environmental Safety, vol. 186, 2019, p. 109748.
Ma J, Li Y, Liu Y, et al. Effects of soil particle size on metal bioaccessibility and health risk assessment. Ecotoxicol Environ Saf. 2019;186:109748.
Ma, J., Li, Y., Liu, Y., Lin, C., & Cheng, H. (2019). Effects of soil particle size on metal bioaccessibility and health risk assessment. Ecotoxicology and Environmental Safety, 186, 109748. https://doi.org/10.1016/j.ecoenv.2019.109748
Ma J, et al. Effects of Soil Particle Size On Metal Bioaccessibility and Health Risk Assessment. Ecotoxicol Environ Saf. 2019 Dec 30;186:109748. PubMed PMID: 31606640.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of soil particle size on metal bioaccessibility and health risk assessment. AU - Ma,Junwei, AU - Li,Yuqian, AU - Liu,Yanzhong, AU - Lin,Chunye, AU - Cheng,Hongguang, Y1 - 2019/10/10/ PY - 2019/05/24/received PY - 2019/09/28/revised PY - 2019/10/01/accepted PY - 2019/10/14/pubmed PY - 2020/1/18/medline PY - 2019/10/14/entrez KW - Bioaccessibility KW - Metal KW - Particle size KW - Risk assessment KW - Soil SP - 109748 EP - 109748 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 186 N2 - Oral ingestion is the main exposure pathway through which humans ingest trace metals in the soil, particularly for children. Metals in different soil particle size fractions may vary in terms of concentration and properties. Urban school/kindergarten soil samples were collected from three cities: Lanzhou in northwest China, Wuhan in central China, and Shenzhen in southeast China. Soil samples were classified according to particle size (<63 μm, 63-150 μm, 150-250 μm, and 250-2000 μm) to estimate the effects of soil particle size on the total content and bioaccessibility of metals (Cd, Cr, Cu, Ni, Pb, and Zn). Based on the results, we assessed whether the standard size <150 μm (containing < 63 μm and 63-150 μm), recommended by the Technical Review Workgroup (TRW) of the Environmental Protection Agency (EPA), and <250 μm (containing < 63 μm, 63-150 μm, and 150-250) recommended by the Bioaccessibility Research Group of Europe (BARGE), are suitable where the largest proportion adhering to hands is the finest soil (<63 μm). The results showed that different metals exhibited different relationships between soil particle size and content and between soil particle size and bioaccessibility. Pb and Zn generally exhibited the greatest bioaccessibility in the coarsest particle sizes (250-2000 μm); whereas the highest Ni bioaccessibility occurred in the finest sizes (<63 μm); the bioaccessibility of other metals did not exhibit any obvious relationships with particle size. When assessing health risks using bioaccessible metal content in the recommended soil particle size ranges (<150 μm and <250 μm) and in finer particles (<63 μm), the results for noncarcinogenic risks to children exhibited no obvious difference, while the actual carcinogenic risks may be underestimated with the use of soil particle size ranges < 150 μm and <250 μm. Therefore, when choosing an optimal particle size fraction to evaluate the health risk of oral soil ingestion, we recommend the use of the bioaccessible metal content in <63 μm soil fraction. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/31606640/Effects_of_soil_particle_size_on_metal_bioaccessibility_and_health_risk_assessment_ DB - PRIME DP - Unbound Medicine ER -