某河流底泥重金属污染地质累积指数评价  

Assessment of geo-accumulation index on the sediment of heavy metals in a river

作　　者：谢娟[1] 孙韵[1] 杨育娟[1] 易秀[1] 张江华[2] 刘瑞平[2] 徐友宁[2] 

机构地区：[1]长安大学环境科学与工程学院 [2]中国地质调查局西安地质调查院

出　　处：《黄金》2012年第12期53-55,共3页Gold

基　　金：国土资源部项目(201111020);陕西省自然科学基础研究(2006D20);中国地质调查局项目(200412300057-1)

摘　　要：通过对双桥河流域进行环境调查,采集了底泥样品,分析了重金属含量,应用地质累积指数对河流底泥进行了评价。其结果表明:汞的地质累积指数为-1.01～2.39,76.92%采样点为Ⅱ级,属于中度污染;铅的地质累积指数为-0.07～2.19,3.85%采样点达到Ⅲ级,属中度污染到强污染,65.38%采样点达到Ⅱ级,属中度污染;镉的地质累积指数为-0.32～1.55,30.77%采样点达到Ⅱ级,属中度污染,50.00%采样点达到Ⅰ级,属无污染到中度污染;铬、砷基本没有污染;铜、锌地质累积指数平均值为0≤Igeo<1,达到Ⅰ级,属于无污染到中度污染;汞、铅的污染较为严重。By investigating field and collecting samples of sediment in the Shuangqiao River, the heavy metals in the sediment have been analyzed, and the sediment of the river was assessed with geo-aceumulation index. The results showed that geo-aecumulation index of Hg was - 1.01 - 2.39, and 76.92 % sampling sites had graded Degree II of pollution, equivalent to moderate pollution ;The geo-accumulation of Pb index was -0.07 -2.19 ,with 3.85 % sampiing sites grading Degree Ⅲ equivalent to moderate or strong pollution, and moderate pollution for 65.38 % sampling site Degree Ⅱ ;The geo-accumulation index of Cd was - 0.32 - 1.55, with 30.77 % sampling sites grading equivalent to moderate pollution, and for 50.00 % sampling sites grading I indicating no pollution or moderate lution. The sediment was not polluted by Cr and As;The average value of geo-accumulation index of Cu and Zn 0 - Ⅰ , meaning no pollution or moderate pollution;The pollution level of Hg and Pb were higher.

关 键 词：河流底泥 重金属污染 地质累积指数 评价 

分 类 号：TD167[矿业工程—矿山地质测量]