铅锌矿山环境土壤重金属污染评价研究

The study about heavy metals pollution in lead-zinc mining activities

调查了某铅锌矿山环境尾矿污染区、坑道废水污染区、污风沉降污染区、精矿运输污染区等4个土壤污染类型28个土样中9个重金属元素(Cd、As、Cr、Cu、Ni、Pb、Zn、Hg、Ag)的含量和形态.结果表明,该矿区土壤已受重金属的明显污染,矿区土壤的重金属元素以残余态为主,有机结合态比例最小,但不同元素之间、不同土壤之间各形态所占比例有很大的差别.Pb以残余态占绝对优势,平均占总量的80%以上;Zn除有机结合态比例较低外(仅占1.89%),其它4种形态平均比例相差不大.图1,表4,参19.

The paper investigated the concentration and chemical association of Cd、As、Cr、Cu、Ni、Pb、Zn、Hg、Ag of twenty-eight soils which were sampled from certain mine included tailing,mining wastewater,waste-wind,and mineral transportation pollution area.The result showed that the soils near the mine have contaminated by heavy metals.The remaining association of heavy metals was main ingredient.The proportion of oxidizable association was least.The remaining association of Pb was 80 percent.The oxidizable of Zn was 1.89 percent.1fig.,4tabs.,19refs.