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A Review of Studies on the Biogeochemical Behaviors of Mercury in the Three Gorges Reservoir, China

文献类型： 外文期刊

作者： Wang, Yongmin 1 ; Yin, Deliang 1 ; Xiang, Yuping 1 ; Xu, Qinqin 1 ; Zhang, Cheng 1 ; Xie, Qing 1 ; Wang, Dingyong 1 ;

作者机构： 1.Southwest Univ, Coll Resources & Environm, Chongqing 400715, Peoples R China

2.Chongqing Key Lab Agr Resources & Environm, Chongqing 400715, Peoples R China

关键词： Three Gorges Reservoir; Water level fluctuation; Mercury; Methylation

期刊名称：BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY （ 影响因子：2.7； 五年影响因子：2.6 ）

ISSN： 0007-4861

年卷期： 2019 年 102 卷 5 期

页码：

收录情况： SCI

摘要： The Three Gorges Reservoir (TGR) is a relatively large reservoir, and its water level management actions produce a widespread water level fluctuation zone (WLFZ), which has characteristics of both terrestrial and aquatic ecosystems. Here, an integrated overview of current knowledge on Hg behaviors in the TGR, especially the WLFZ, as well as exposure risk to local residents was presented. Hg levels in the TGR were comparable with other natural aquatic systems. WLFZ in the TGR was confirmed to be an environment favorable for Hg methylation by enhancing microbial activity, promoting sulfur cycling and increasing the level of low-molecular-weight organic matters. However, elevated fish Hg concentrations did not follow the impoundment of TGR, indicating no obvious reservoir effect, while it is still noteworthy that frequently consuming fish is likely to be a methylmercury (MeHg) exposure pathway for specific populations e.g. fishermen around the TGR.

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