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- W3141517717 endingPage "117015" @default.
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- W3141517717 abstract "Chlorinated paraffins (CPs), a type of toxic and persistent organic substances, can persist in environmental media for a long time and have adverse effects on human health. Thus, it is of great importance to investigate the accumulation and environmental behavior of CPs in industrial areas. In this study, farmland soil, water, and sediment core samples from abandoned oxidation ponds used by three chemical plants to treat wastewater over the past 38 years were investigated in detail. Results show that the concentration of CPs in sediments varied significantly with the water flow direction. The oxidation pond closest to a sewage outlet had the highest concentrations of short-chain chlorinated paraffin (SCCPs) and medium-chain chlorinated paraffin (MCCPs), within the ranges of 44.0–6.21 × 104 ng/g dw (mean 9.32 × 103 ng/g dw) and 143–1.30 × 106 ng/g dw (mean 1.22 × 105 ng/g dw), respectively. However, in the oxidation pond farthest from the sewage outlet, CP concentrations in sediments were significantly reduced, with ∑SCCPs and ∑MCCPs concentrations ranging from N.D.-249 ng/g dw (mean 66.8 ng/g dw) and N.D.-222 ng/g dw (mean 34.0 ng/g dw), respectively. Moreover, MCCP level in the water was below the detection limit, while the concentration of SCCP ranged from 41.0 to 1.53 × 103 ng/L (mean 267 ng/L). Finally, a remarkable spatial trend and specific congener distribution were observed in the sediment test results. The horizontal and vertical distributions of the sediments indicate that short-chain (C10-11) and low-chlorinated (Cl6-7) homologs are more likely to migrate deeper or farther away from the pollution source." @default.
- W3141517717 created "2021-04-13" @default.
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- W3141517717 date "2021-07-01" @default.
- W3141517717 modified "2023-10-12" @default.
- W3141517717 title "Migration mechanism and risk assessment of chlorinated paraffins in highly polluted Ya’Er lake area, China" @default.
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- W3141517717 doi "https://doi.org/10.1016/j.envpol.2021.117015" @default.
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