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Chinese Journal of Geochemistry

, Volume 24, Issue 2, pp 179–183 | Cite as

Damming effect on the distribution of mercury in Wujiang River

  • Jiang Hongmei
  • Feng Xinbin
  • Dai Qianjin
Article

Abstract

Seasonal changes in total mercury concentrations in surface water were observed for the Wujiang River, with higher values at the time of greater flow. The total mercury in this river was mostly associated with suspended particles, particulate mercury accounting for 84% of the total mercury flux on average during the high flow period, and 52% of the total mercury flux on average in the low flow period. Significant losses of Hg from the water were observed in the downstreams of the reservoir. In addition, the concentrations of particulate mercury in the downstreams of reservoir appeared to have been enhanced by sediment re-suspension and shoreline erosion caused by flood discharge, while the filtered portion decreased. These observations suggested that reservoirs played an important role in controlling the transport and fate of mercury in the Wujiang River.

Key words

damming reservoir mercury 

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Copyright information

© Institute of Geochemistry, Chinese Academy of Sciences 2005

Authors and Affiliations

  1. 1.State Key Laboratory of Environmental Geochemistry, Institute of GeochemistryChinese Academy of SciencesGuiyangChina
  2. 2.Graduate SchoolChinese Academy of SciencesBeijingChina

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