title: [Characteristics of heavy metal pollution in Daninghe River and Modaoxi River of Three Gorges Reservoir areas].
abstract: In order to explore the potential ecological risk of heavy metals in Three Gorges Reservoir areas, the present study analyzed the heavy metals in sediments and wild crucain carp from Daning River and Modaoxi River which are two typical tributaries, and then the potential risk was evaluated using potential ecological risk index for sediments and comprehensive pollution index for fish, respectively. The results showed that concentrations of Zn and Cr were higher (Daning River: 78.31 and 83.98 mg x kg(-1); Modaoxi River: 99.03 and 94.20 mg x kg(-1)), while Cd was the lowest (Daning River: 0.62 mg x kg(-1); Modaoxi River: 0.75 mg x kg(-1)). Moreover, an obvious increasing trend of these elements was observed in these tributaries from upstream to downstream. For the wild crucain carp, the lowest concentrations of these elements were detected in muscles, and the highest concentrations were in the intestinal. However, no obvious increasing trend of these elements was observed from upstream to downstream. The potential ecological risk in sediments showed a high risk, while no risk was observed in fish.
authors.affiliation: State Environmental Protection Key Laboratory of Estuarine and Coastal Research, State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environment Sciences, Beijing 100012, China. anlh@craes.org.cn
authors.forename: Li-hui
authors.initials: LH
authors.lastname: An
authors.forename: Yan-qiang
authors.initials: YQ
authors.lastname: Zhang
authors.forename: Bing-hui
authors.initials: BH
authors.lastname: Zheng
authors.forename: Yue
authors.initials: Y
authors.lastname: Liu
authors.forename: Shuang-shuang
authors.initials: SS
authors.lastname: Song
authors.forename: Zi-cheng
authors.initials: ZC
authors.lastname: Li
authors.forename: Hao
authors.initials: H
authors.lastname: Chen
authors.forename: Xing-ru
authors.initials: XR
authors.lastname: Zhao
authors.forename: Jin
authors.initials: J
authors.lastname: Lin
mesh_terms: D000818:Animals; D002347:Carps / Q000378:metabolism; D002681:China; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis*; D045483:Rivers; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism; D014881:Water Supply
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical