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- W2019985000 abstract "Water, suspended solid (SS) and sediment samples were collected from nine water courses in Tianjin, China and analyzed for dichlorodiphenyltrichloroethane (DDT) and its metabolites (DDXs, including o,p′-,p,p′-DDT, DDD and DDE). The average DDX concentrations in water, SS and sediment were 59 ± 30 ng l−1, 2690 ± 1940 ng g−1 dry wt. and 340 ± 930 ng g−1 dry wt., respectively. Due to the termination of the extensive agricultural application and industrial manufacture, DDXs in river sediment decreased by one order of magnitude since 1970’s and low DDT fractions in these sediments were observed. Still, DDXs in the sediments near the outlets of the major manufacturers remained relatively high attributed to the historic input. DDXs in sediment were also positively correlated with organic matter content. Spatial distributions of DDXs in SS and water was different from that in sediment. For SS, a negative correlation between DDX concentration and SS content indicated a dilution effect in many rivers. Dissolved organic carbon content was the major factor affecting DDX concentrations in water phase. Wastewater discharged from dicofol manufacturers and likely illegal agricultural application were the primary reasons causing high DDT (DDE + DDD) ratios in SS and water." @default.
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- W2019985000 date "2007-05-01" @default.
- W2019985000 modified "2023-10-12" @default.
- W2019985000 title "Spatial and temporal variations and possible sources of dichlorodiphenyltrichloroethane (DDT) and its metabolites in rivers in Tianjin, China" @default.
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- W2019985000 doi "https://doi.org/10.1016/j.chemosphere.2006.12.082" @default.
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