Bioaccumulation of dichlorodiphenyltrichloroethanes (DDTs) in carp in a water/sediment microcosm: important role of sediment particulate matter and bioturbation

文献类型： 外文期刊

第一作者： Di, Shanshan

作者： Di, Shanshan;Wang, Xiangyun;Qi, Peipei;Wang, Zhiwei;Xu, Hao;Zhang, Hu;Wang, Xinquan;Di, Shanshan;Wang, Xiangyun;Qi, Peipei;Wang, Zhiwei;Xu, Hao;Zhang, Hu;Wang, Xinquan;Di, Shanshan;Wang, Xiangyun;Qi, Peipei;Wang, Zhiwei;Xu, Hao;Zhang, Hu;Wang, Xinquan;Diao, Jinling;Han, Jiajun

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关键词： DDTs; Sediment; T. tubifex; Carp; Bioaccumulation

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN： 0944-1344

年卷期： 2019 年 26 卷 10 期

页码：

收录情况： SCI

摘要： Sediments are reservoirs and sources of DDTs to the aquatic ecosystem. However, the role of sediment particulate matter and benthic organisms in transferring DDTs remains unclear. In this study, microcosms were built up with different groups to simulate a freshwater system with DDT-contaminated sediment and organisms. The impacts of different exposure routes (water and sediment) on the changes of DDT and its metabolites (DDD and DDE) in carp (Cyprinus carpio) were investigated. The bioturbation of Tubifex tubifex (Oligochaeta, Tubificidae) was investigated to understand the fate and transfer of DDTs in aquatic environment. For the sediment treatment, the concentrations of o,p'-DDT in carp were significantly higher than those of p,p'-DDT, and the metallothionein (MT) content decreased. The bioaccumulation of DDTs in carp via sediment particulate matter was significantly higher/faster than that via overlying water. T. tubifex and sediment particulate matter accelerate DDT bioaccumulation in carp. Selective enrichment of the (+)-o,p'-DDT and (+)-o,p'-DDD was found in carp. These results help to reduce uncertainty in ecological and health risk assessments and to better understand the risk of DDTs in the environment.

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