首页|Bioaccessibility and health risk assessment of hydrophobic organic pollutants in soils from four typical industrial contaminated sites in China
Bioaccessibility and health risk assessment of hydrophobic organic pollutants in soils from four typical industrial contaminated sites in China
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Bioaccessibility and health risk assessment of hydrophobic organic pollutants in soils from four typical industrial contaminated sites in China
There have been reports of potential health risks for people from hydrophobic organic pol-lutants,such as polycyclic aromatic hydrocarbons(PAHs),polychlorinated hydrocarbons(PCHs),and organophosphate flame retardants(OPFRs).When a contaminated site is used for residential housing or public utility and recreation areas,the soil-bound organic pollu-tants might pose a threat to human health.In this study,we investigated the contamination profiles and potential risks to human health of 15 PAHs,6 PCHs,and 12 OPFRs in soils from four contaminated sites in China.We used an in vitro method to determine the oral bioac-cessibility of soil pollutants.Total PAHs were found at concentrations ranging from 26.4 ng/g to 987 ng/g.PCHs(0.27-14.3 ng/g)and OPFRs(6.30-310 ng/g)were detected,but at low levels compared to earlier reports.The levels of PAHs,PCHs,and OPFRs released from contami-nated soils into simulated gastrointestinal fluids ranged from 1.74％to 91.0％,2.51％to 39.6％,and 1.37％to 96.9％,respectively.Based on both spiked and unspiked samples,we found that the oral bioaccessibility of pollutants was correlated with their logKow and molecular weight,and the total organic carbon content and pH of soils.PAHs in 13 out of 38 contaminated soil samples posed potential high risks to children.When considering oral bioaccessibility,nine soils still posed potential risks,while the risks in the remaining soils became negligible.The contribution of this paper is that it corrects the health risk of soil-bound organic pollutants by detecting bioaccessibility in actual soils from different contaminated sites.
Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control,Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health,School of Environmental Science and Engineering,Guangdong University of Technology,Guangzhou 510006,China
State Key Laboratory of Environmental and Biological Analysis,Department of Chemistry,Hong Kong Baptist University,Hong Kong 999077,China
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