Organochlorine Pesticides in Sediments around Chaohu Lake: Concentration Levels and Vertical Distribution |
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| Authors: | Liu Zhang Da-Qiang Yin Yakton Wu Shu-Chuan Peng Tian-Hu Chen |
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| Affiliation: | 1. Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, China;2. Anhui Academy of Environmental Science Research, Hefei, China;3. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, China;4. Laboratory for Nanomineralogy and Environmental Material, Hefei University of Technology, Hefei, China |
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| Abstract: | Eighteen organochlorine pesticides (OCPs) were investigated in surface sediments from the Nanfei River and in four sediment cores from the primary estuaries of Chaohu Lake, Eastern China. The results indicate that the OCP concentrations in the surface and core sediments around Chaohu Lake were 3.48–121.08 (with a mean of 34.93) ng/g and 0.60–39.28 (7.07) ng/g, respectively. Significantly higher concentrations of ΣOCPs were observed in sediment samples from the Nanfei River and its estuary. The three important OCP contributors around Chaohu Lake were dichlorodiphenyltrichloroethane and its metabolites (DDTs), hexachlorocyclohexane isomers (HCHs), and hexachlorobenzene (HCB), which originated primarily from the historical use of technical DDTs and HCHs. A principal component analysis (PCA) suggests that HCB and lindane may originate from the same sources, and DDTs were greatly influenced by organic carbon from the soil environment and the impact of urbanization processes. |
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| Keywords: | Organochlorine pesticides (OCPs) sediment vertical distribution Chaohu Lake |
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