Cr contents and its pollution evaluation in soil of a uranium mine

ICP-MS was used to determine the contents of heavy metal Cr in the 133 soil samples which was taken form a uranium mine, East China. In focusing on studied the contents and its spatial distribution characteristics of heavy metals Cr in samples. Results show that the concents of Cr in the soil in whole mining area were 10.04∼ 93.9 mg/kg, with a mean of 51.44 mg/kg. The contents of Cr in the soil in regional respectively, were the downstream of tailings dam mining area > whole mining > not mining which had the mining area > tailings dam. Using the single factor pollution index, showed that more than half of the whole mining area were mild contamination, three-quarters of the mining regions were mild contamination, the downstream of tailings dam also had mild contamination, the tailings dam and not mining which had the mining area were non-pollution. (authors)