Contents and Pollution Risk Assessment of Heavy Mentals in Reclaimed Soil
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    Abstract:

    [Objective] The contents and pollution state of heavy mentals of soil in Xiaoyi bauxite mine of Shanxi Province were studied to provide scientific basis for the understanding and evaluating the risk of heavy metal pollution in reclaimed soil in mining area. [Methods] The contents of Cd, Cr, Cu, Pb, As and Ni by ICP-MS were measured, and their changes along different reclaimed years were analyzed. Single factor index and Nemerow comprehensive index methods were used to evaluate the potential pollution degree and risk. [Results] (1) The mean value of Cd was 5.19 mg/kg, exceeding the 0.3 mg/kg of national stand by 17 times. Other elements was not exceed the national stand and no pollution risk was observed. With the extension of reclamation time, the content of Cd increased at 0-15 cm and decreased at 15-30 cm layer. (2) The single pollution index of Cd is the highest of all sampling plots, was assessed at 5th level severe pollution. Other 5 elements are lower, and are at 1st degree of safe level. The Nemerow comprehensive index ranged from 12.08 to 13.14, with an average of 12.43, at severe pollution level, and it exceeds the 5th degree by 3~4 times. (3) Soil which was used to reclaim is the mainly pollution resource, the contents of 6 heavy mental elements exceeded the national stand. [Conclusion] The soil in reclamation area have been polluted by Cd sourced from reclaimed soil, manure and dust. When considering reclaimed mine, the quality of soil which will be used to reclaim should be protected strictly.

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聂兴山.铝矿复垦土壤重金属含量变化及污染风险评价[J].水土保持通报英文版,2017,37(2):321-326

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History
  • Received:October 17,2016
  • Revised:October 24,2016
  • Adopted:
  • Online: May 10,2017
  • Published: