Seasonal distribution of total mercury and methylmercury in sediments of the Wujiangdu Reservoir,Guizhou,China

查看全文 作　　者：JIANG [1,2]Hongmei;FENG [1]Xinbin;LI [1]Guanghui;QIU [1]Guangle;YAN [1]Haiyu

机构地区：[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

出　　处：《Chinese Journal Of Geochemistry》索引2007年第26卷第4期,共4页

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant No.40532014). 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. 关键词：吴江度储蓄池水银甲基水银环境污染

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Seasonal distribution of total mercury and methylmercury in sediments of the Wujiangdu Reservoir,Guizhou,China

参考文献(16)

引证文献(2)

耦合文献(103)

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