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《Journal of Southwest University(Natural Science Edition)》 2009-01
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A Preliminary Study of the Contents and Distribution of Mercury in the Sediments of Lake Caohai in Guizhou

QIAN Xiao-li1,2,FENG Xin-bin2,BI Xiang-yang2,3,GUO Yan-na2,3,FU Xue-wu2,3,LIANGPeng2,41. College of Resources and Environment Engineering,Guizhou University,Guiyang Guizhou 550003,China;2. State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China;3. Graduate School of Chinese Academy of Science,Beijing 100039,China;4. School of Resources and Environment,Southwest University,Chongqing 400716,China  
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.
【Fund】: 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)
【CateGory Index】: X52
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