The impact of sulfate reduction on the distribution of methylmercury in reservoirs in the city of Guiyang  

作　　者：HE Tianrong LI Ting Yang Ruidong LUO Guangjun LANG Xiaofang An Yanling YAN Haiyu 

机构地区：[1]Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou University [2]State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences

出　　处：《Chinese Journal Of Geochemistry》2013年第1期104-109,共6页中国地球化学学报

基　　金：financially supported by Natural Science Foundation of China(Nos.41063006 and 40973083);"211 Project"Key Discipline Construction(KST2009003);the Guizhou Key Laboratory Construction Program(Qiankeheji-Z-[2012]4012)

摘　　要：In this paper, the relationship between sulfate reduction potential and mercury methylation potential was studied in the Aha, Baihua and Hongfeng reservoirs from Guiyang City. The methylmercury (MeHg) concentrations of lake water in the Aha Reservoir were greatly elevated as compared to those of the Hongfeng and Baihua reservoirs, which was correlated with its distinctly high SRB abundance, SO42-, and S2- concentrations. Among the three reservoirs, however, the highest MeHg was observed in in the top several centimenters of pore water profile in the Hongfeng Reservoir where the lowest S2- in pore water occurred. The distributions of MeHg in lake water and pore water showed the highest methylation potential occurred at water-sediment surface for the Aha Reservoir and the in the top several centimenters of sediments for the Hongfeng Reservoir. It is guessed that the highest mercury methylation only occurs at the sites with certain sulfide concentrations.In this paper, the relationship between sulfate reduction potential and mercury methylation potential was studied in the Aha, Baihua and Hongfeng reservoirs from Guiyang City, The methylmercury （MeHg） concentrations of lake water in the Aha Reservoir were greatly elevated as compared to those of the Hongfeng and Baihua reser- voirs, which was correlated with its distinctly high SRB abundance, SO42, and S2 concentrations. Among the three reservoirs, however, the highest MeHg was observed in in the top several centimenters of pore water profile in the Hongfeng Reservoir where the lowest S2 in pore water occurred. The distributions of MeHg in lake water and pore water showed the highest methylation potential occurred at water-sediment surface for the Aha Reservoir and the in the top several centimenters of sediments for the Hongfeng Reservoir. It is guessed that the highest mercury methy- lation only occurs at the sites with certain sulfide concentrations.

关 键 词：硫酸盐还原菌 阿哈水库 甲基汞 贵阳市 红枫湖 甲基化 水浓度 孔隙水 

分 类 号：X524[环境科学与工程—环境工程]