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Contamination by organochlorine pesticides (OCPs), such as hexachlorobenzene (HCB), DDTs and hexachlorocyclohexane isomers (HCHs) was examined in surface soils from paddy, upland and wetland fields in the region around the Hongze Lake in 2009, and some factors influencing residual levels of OCPs in soils were analyzed. DDTs and HCHs were the predominant contaminants in soils. The residual levels of...
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