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

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.