第二松花江水中甲基汞的时空变化规律  

Temporal and Spatial Variation Rule of Methylmercury in Water in the Second Songhua River

作　　者：孙晓静[1,2] 王起超[1] 张少庆[1,3] 张秀武[1,2] 张新艳[1,2] 张仲胜[1,2] 

机构地区：[1]中国科学院东北地理与农业生态研究所,长春130012 [2]中国科学院研究生院,北京100049 [3]吉林农业大学资源与环境学院,长春130118

出　　处：《环境科学》2008年第11期3017-3021,共5页Environmental Science

基　　金：国家重点基础研究发展规划(973)项目(2004CB4185002)

摘　　要：为研究第二松花江水中甲基汞的时空变化规律,分别在平水期和丰水期沿二松流域进行了采样分析,得出其空间变化规律:红石、十号线和泔水缸3个断面甲基汞含量较高,在这3个断面两侧甲基汞含量均下降.季节性变化规律:除涝州和四方台断面外,其他各采样断面丰水期甲基汞含量均低于平水期.通过对比分析1981年、1983年和本研究结果,得出了年际性变化规律:1981年甲基汞含量随与排污口距离的增加而降低;1983年污染源已切断1 a,水中甲基汞含量骤降,达到天然背景值水平,但肇源至四方台江段甲基汞含量均在0.35 ng.L-1以上;2006年各相应断面甲基汞含量高于1983年,低于1981年.此外,本研究给出了二松水中甲基汞的污染程度.The concentrations of methylmercury （MeHg） in water were investigated in both level period and flood period in the Second Songhua River. The results show that the MeHg concentrations in water of Hongshi, Shihaoxian and Ganshuigang sites are relatively higher than other sampling sites. The MeHg concentrations in the level period are higher than the flood season in most sampling sites beside Laozhou and Sifangtai sites. By comparing the MeHg concentrations in different years, the results reveal that the MeHg concentrations in 1981 decreased with the distances increasing from the sites to the pollution source. The MeHg concentrations in most sites greatly fell in 1983, when the pollution source had been ceased for one year. The concentrations approached the natural background level in most sites, however, they were over 0.35 ng· L^-1 from Zhaoyuan site to Sifangtai site. The MeHg concentrations in corresponding sites in 2006 were higher than that in 1983, but were lower than that in 1981. Moreover, the pollution level in water of the Second Songhua River was also discussed.

关 键 词：第二松花江 水 甲基汞 变化规律 

分 类 号：X131[环境科学与工程—环境科学] X143