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- Title
A Review of Studies on the Biogeochemical Behaviors of Mercury in the Three Gorges Reservoir, China.
- Authors
Wang, Yongmin; Yin, Deliang; Xiang, Yuping; Xu, Qinqin; Zhang, Cheng; Xie, Qing; Wang, Dingyong
- Abstract
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.
- Subjects
MERCURY &; the environment; MERCURY cycle (Biogeochemistry); METHYLATION; SAN Xia Reservoir (China); WATER levels
- Publication
Bulletin of Environmental Contamination & Toxicology, 2019, Vol 102, Issue 5, p686
- ISSN
0007-4861
- Publication type
Article
- DOI
10.1007/s00128-019-02586-1