金矿排污渠沿岸土壤中Ba、Sr、As和Hg的污染分析

Analyze of the Soil Contamination by Barium,Strontium,Arsenic and MercuryAlong the Drainage Ditch Around Gold Mine

以某金矿排水沟附近土壤为研究对象,对土壤中Ba、Sr、As和Hg4种重金属含量进行分析,为金矿周围土壤污染治理及人工生态修复提供依据.实验结果表明,5个样区内梅罗综合污染指数均大于3,处于严重污染状态；4种重金属中,Hg在整个研究区内污染最严重,在第4样区累积程度达到最高,其平均值为背景值的396倍；As累积次之,其平均值为背景值的8.0～9.1倍,超过严重污染水平,且分布特征与Hg相似；Ba、Sr分布特征相似,在矿区内有相同或相近污染源.

Soil around gold mine is chosen as the research object,to conduct research on the contents of heavy metal in soil including barium,strontium,arsenic and mercury,providing theoretical basis for soil pollution control and man-made ecological restoration.The results show that the nemerol pollution index of soil is all above 3 in all sampling area and in heavy pollution.The accumulation of mercury is very high in all sample regions and the average content of it is highest in the fourth area,reaching 396 times more than that of the criteria of background concentrations.The pollution level of arsenic is second and its average contents is 8.0~9.1 times as criteria of background concentrations,exceeding the serious pollution level.The distribution character of arsenic is similar to that of mercury.The distribution character of barium is similar to that of strontium and they probably have the same pollution sources.