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Pollution characteristics and ecological risk assessment of HCHs and DDTs in estuary wetland sediments from the Bohai Bay, North China

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Hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) tend to persist in the environment for long periods of time. The concentration and distribution of HCHs and DDTs were investigated in surface sediments of Yongdingxinhe wetland and Binhai wetland by gas chromatography-mass spectrometer (GC-MS). All isomers of HCHs and DDTs were detected in all of the samples. The concentrations of total HCHs (ΣHCHs) in two wetland sediments ranged from 69.81 to 379.28 ng · g −1, with a mean value of 224.55 ng · g −1. The concentrations of total DDTs (ΣDDTs) ranged from 98.32 to 129.10 ng · g −1, with a mean value of 113.71 ng · g −1. The results of an ecological risk assessment demonstrated that there was high-risk ecological effect of organochlorine pesticides (OCPs) on the estuary wetlands. Lindane and technical DDTs were found to be the main sources of OCPs.

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This work was supported by the Project of Tianjin with Spill Oil Accident from Penglai Oilfield 19–3 Compensation (No. 19-3BC2014-05).

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Correspondence to Xianbin Liu.

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Responsible editor: Ester Heath

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Liu, Q., Tian, S., Jia, R. et al. Pollution characteristics and ecological risk assessment of HCHs and DDTs in estuary wetland sediments from the Bohai Bay, North China. Environ Sci Pollut Res 24, 26967–26973 (2017). https://doi.org/10.1007/s11356-015-5882-8

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  • Wetland
  • Surface sediment
  • HCHs
  • DDTs
  • Ecological risk