钨矿矿区土壤多种重金属含量及赋存形态研究

On the Combined Forms of the Heavy Metals in the Soil of the Tungsten Ore

摘要: 以赣州市赣县王母渡镇东埠头钨矿矿区开采区、尾砂库、矿区附近河流沿岸及矿区土壤为研究对象，选择该矿区污染土壤样本21个，采用王水消煮法对土壤样品进行处理，运用等离子体发射光谱仪（ICP-AES）测定土壤样品中Pb、As、Hg、Cr、Cd、Zn、Cu、Ni的含量.选用修正的BCR法测定矿区土壤中重金属元素的赋存形态，结果表明：As、Zn、Cr、Pb、Ni在外界条件影响下可转换为可交换态，矿区中残留选矿剂对重金属赋存形态的影响较大，As、Cd污染较为严重.

Abstract: Using the 21 polluted soil samples in the mining area, tailings reservoir, river banks near the mining areas of Dongbutou Tungsten Mine as research subjects, this paper studies the contents of Pb, As, Hg, Cr, Cd, Zn, Cu and Ni in the soil samples by ICP-AES. The modified BCR determines the existence forms of heavy metals in the soil of the mining region. The results show that As, Zn, Cr, Pb and Ni will be converted into exchangeable forms under the influence of the external conditions. The residual dressing agents in the soil of the mining region have great effects on the existence forms of heavy metals, of which, As, Cd pollution is more serious.