| Damming effect on the distribution of mercury in Wujiang River |
| |
| 作者姓名： | 蒋红梅 冯新斌 戴前进 |
| |
| 作者单位： | [1]StateKeyLaboratoryofEnvironmentalGeochemistry,InstituteofGeochemistry,ChineseAcademyofSciences,Guiyang550002,China／／GraduateSchool,ChineseAcademyofSciences,Beijing100039,China [2]StateKeyLaboratoryofEnvironmentalGeochemistry,InstituteofGeochemistry,ChineseAcademyofSciences,Guiyang550002,China |
| |
| 基金项目： | CAS Innovation Project，国家自然科学基金 |
| |
| 摘 要： | 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.
|
| 关 键 词： | 堰塞效应 乌江河 汞 化学污染 水库治理 |
| 收稿时间： | 5 May 2007 |
Damming effect on the distribution of mercury in Wujiang River |
| |
| Jiang Hongmei,Feng Xinbin,Dai Qianjin.Damming effect on the distribution of mercury in Wujiang River[J].Chinese Journal of Geochemistry,2005,24(2):179-183. |
| |
| Authors: | Jiang Hongmei Feng Xinbin Dai Qianjin |
| |
| Institution: | (1) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550002 Guiyang, China;(2) Graduate School, Chinese Academy of Sciences, 100039 Beijing, China |
| |
| 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. |
| |
| Keywords: | damming reservoir mercury |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
|
