首页|期刊导航|中国地球化学学报（英文版）|Seasonal distribution of total mercury and methylmercury in sediments of the Wujiangdu Reservoir, Guizhou, China
中国地球化学学报（英文版）2007，Vol.26Issue(4)：414-417,4.
Seasonal distribution of total mercury and methylmercury in sediments of the Wujiangdu Reservoir, Guizhou, China
Seasonal distribution of total mercury and methylmercury in sediments of the Wujiangdu Reservoir, Guizhou, China
摘要
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.关键词
Wujiangdu Reservoir/ total mercury/ methylmercuryKey words
Wujiangdu Reservoir/ total mercury/ methylmercury分类
天文与地球科学引用本文复制引用
..Seasonal distribution of total mercury and methylmercury in sediments of the Wujiangdu Reservoir, Guizhou, China[J].中国地球化学学报（英文版）,2007,26(4):414-417,4.基金项目
This work was financially supported by the National Natural Science Foundation of China (Grant No. 40532014). （Grant No. 40532014）
