Organochlorine pesticides (HCHs and DDTs) in soils along the north coastal areas of the Bohai Sea,China |
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| Authors: | Wenyou Hu Tieyu Wang Jong Seong Khim Wei Luo Wentao Jiao |
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| Institution: | 1. State Key Laboratory of Urban and Regional Ecology, Chinese Academy of Sciences , Beijing, China;2. State Key Laboratory of Soil and Sustainable Agriculture , Institute of Soil Science, Chinese Academy of Sciences , Nanjing, China;3. State Key Laboratory of Urban and Regional Ecology, Chinese Academy of Sciences , Beijing, China;4. Division of Environmental Science and Ecological Engineering , Korea University , Seoul, South Korea |
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| Abstract: | A systematic survey of organochlorine pesticides (OCPs) including hexachlorocyclohexane isomers (α-HCH, β-HCH, γ-HCH, δ-HCH and ΣHCH) and dichlorodiphenyltrichloroethane metabolites (p,p′-DDT, p,p′-DDE, o,p′-DDT, p,p′-DDD and ∑DDT) in soils along the north coastal areas of the Bohai Sea, China, has been lacking. In this study, 31 representative surface soil samples were collected along the north coastal and riverine areas of the Bohai Sea to characterise the potential for adverse effects of ∑HCH, ∑DDT and their individual isomers and transformation products. Concentrations of ΣHCH and ΣDDT in soils ranged from less than the limit of detection (1 ng · g?1 dw (mean: 3.5 ng · g?1 dw) and2 ng · g?1 dw (mean: 1.7 × 101 ng · g?1 dw), respectively. Compared with studies of OCPs in soils from other locations, concentrations of HCHs and DDTs observed in this study were moderate. Concentrations of OCPs observed in soils were generally less than proposed reference values. HCH residues were a mixture of historical technical HCH and current lindane sources. The pattern of DDTs was consistent with historical releases of technical DDTs. Selected soil physicochemical properties did not explain the sorption and/or partitioning of HCHs or DDTs. |
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| Keywords: | soil contamination organochlorine pesticides relative proportions risk assessment sources |
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