| Seasonal distribution of total mercury and methylmercury in sediments of the Wujiangdu Reservoir, Guizhou, China |
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| 作者姓名： | JIANG Hongmei FENG Xinbin LI Guanghui QIU Guangle YAN Haiyu |
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| 作者单位： | JIANG Hongmei1，2*，FENG Xinbin1，LI Guanghui1，QIU Guangle1，and YAN Haiyu1 1 State Key Laboratory of Environmental Geochemistry，Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China 2 Chongqing Communications Research and Design Institute，Chongqing 400067，China |
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| 摘 要： | The concentrations of total mercury and methylmercury in sediments were determined at the dam of the Wujiangdu Reservoir in different seasons. Total mercury (HgT) levels in the whole sediment profile were 254.2±47.0 ng/g in winter, 254.2±31.6 ng/g in spring, and 256.7±60.8 ng/g in summer, without significant variations in different seasons or at different depths. In contrast, the methylmercury (MeHg) compounds were most abundant at the sediment-water interface and decreased progressively with depth. MeHg contents of the sediments during different seasons are highly dependent on microbial activity, and seem to be higher when Hg (II)-methylating microorganisms are active. Thus, MeHg levels tend to rise in the loci where nutrient supplies and biological productivity are favorable. The percentage of HgT that is present as MeHg in the sediments increased gradually from December 2003 to April 2004 and to July 2004.
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| 关 键 词： | 吴江度储蓄池 水银 甲基水银 环境污染 |
| 收稿时间： | 27 March 2006 |
| 修稿时间： | 2006-03-27 |
Seasonal distribution of total mercury and methylmercury in sediments of the Wujiangdu Reservoir,Guizhou, China |
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| JIANG Hongmei FENG Xinbin LI Guanghui QIU Guangle YAN Haiyu.Seasonal distribution of total mercury and methylmercury in sediments of the Wujiangdu Reservoir, Guizhou, China[J].Chinese Journal of Geochemistry,2007,26(4):414-417. |
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| Authors: | Jiang Hongmei Feng Xinbin Li Guanghui Qiu Guangle Yan Haiyu |
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| Institution: | (1) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China;(2) Chongqing Communications Research and Design Institute, Chongqing, 400067, China |
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| Abstract: | The concentrations of total mercury and methylmercury in sediments were determined at the dam of the Wujiangdu Reservoir in
different seasons. Total mercury (HgT) levels in the whole sediment profile were 254.2±47.0 ng/g in winter, 254.2±31.6 ng/g in spring, and 256.7±60.8 ng/g in summer,
without significant variations in different seasons or at different depths. In contrast, the methylmercury (MeHg) compounds
were most abundant at the sediment-water interface and decreased progressively with depth. MeHg contents of the sediments
during different seasons are highly dependent on microbial activity, and seem to be higher when Hg (II)-methylating microorganisms
are active. Thus, MeHg levels tend to rise in the loci where nutrient supplies and biological productivity are favorable.
The percentage of HgT that is present as MeHg in the sediments increased gradually from December 2003 to April 2004 and to July 2004. |
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| Keywords: | Wujiangdu Reservoir total mercury methylmercury |
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