贵州草海沉积物汞的含量和分布特征初步研究  

A Preliminary Study of the Contents and Distribution of Mercury in the Sediments of Lake Caohai in Guizhou

作　　者：钱晓莉[1,2] 冯新斌[2] 闭向阳[2,3] 郭艳娜[2,3] 付学吾[2,3] 梁鹏[2,4] 

机构地区：[1]贵州大学资源与环境工程学院,贵阳550003 [2]中国科学院地球化学研究所、环境地球化学国家重点实验室,贵阳550002 [3]中国科学院研究生院,北京100039 [4]西南大学资源环境学院,重庆400716

出　　处：《西南大学学报（自然科学版）》2009年第1期32-36,共5页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金重点资助项目(40532014);中国科学院知识创新工程重要方向资助项目(KZCX3-SW-443)

摘　　要：为弄清目前草海沉积物汞污染情况,研究了不同水文季节(枯水期和丰水期)草海沉积物中汞的含量和分布特征.结果表明:草海沉积物总汞(THg)浓度为762.7～1014.7ng/g,甲基汞(TMeHg)浓度为0.11～3.9ng/g;沉积物总汞高于天然沉积物汞浓度,表明沉积物已经受到污染.有机质的降解直接或间接影响总汞的分布;沉积物甲基汞在丰水期大于枯水期,有机质含量高的草海沉积物中甲基汞含量却不高,主要与丰富的水生植物有关.In order to find out whether Lake Caohai was mercury-polluted, the content and distribution of mercury were studied in the sediments during the low-flow period and high-flow period. The concentrations of total mercury ranged from 762.7 ng/g to 1 014.7 ng/g, total methylmercury ranged from 0.11 to 3.9 ng/g, which is too high compared with the data reported in other uncontaminated lakes, indicating that Caohai has been contaminated in terms of mercury in its sediments. The degradation of organic substances affected the distribution of mercury in the sediments. Concentration of methylmercury in the higher flow period was higher than in the low flux period. However, concentration of methylmercury was not high in the sediments containing high organic matter, which was mainly associated with the abundant hydrophytes in the lake.

关 键 词：汞 含量 沉积物 贵州草海 

分 类 号：X321[环境科学与工程—环境工程]