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These experiments simulate the neutral precipitation and sulfuric acid precipitation leaching nickel polluted fine sand under diverse precipitation rate, explore the removal effect of leaching process and to provide basic research data support for the study of groundwater pollution. The research shows, when choose neutral water for leaching, the removal rate of nickel were 7.57%, 2.81%, and 0.67% under violent rain, very heavy rain, and heavy rain; when choose sulfuric acid water with pH 5.02, the removal rate were 17.03%, 12.89%, and 2.31%. Acidic rain increased the Ni removal rate by 1.64% to 10.09% compared to neutral rain (pH 7.0), with an average increase of 7.06%. The most significant improvement was seen in the violent rain group. Nickel was more easily leached form fine sand under acid environment.

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Research on the Leaching Effect of Simulated Neutral and Sulfuric Acid Rain on Ni-Contaminated Fine Sand

  • 会议论文

  • 发表日期：

    2025年

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  • Qiang Shan,
  • Xizhao Tian,
  • Yanling Lai,
  • Ying Wang,
  • Bingtai Ma,
  • Weiyan Chen

摘要

These experiments simulate the neutral precipitation and sulfuric acid precipitation leaching nickel polluted fine sand under diverse precipitation rate, explore the removal effect of leaching process and to provide basic research data support for the study of groundwater pollution. The research shows, when choose neutral water for leaching, the removal rate of nickel were 7.57%, 2.81%, and 0.67% under violent rain, very heavy rain, and heavy rain; when choose sulfuric acid water with pH 5.02, the removal rate were 17.03%, 12.89%, and 2.31%. Acidic rain increased the Ni removal rate by 1.64% to 10.09% compared to neutral rain (pH 7.0), with an average increase of 7.06%. The most significant improvement was seen in the violent rain group. Nickel was more easily leached form fine sand under acid environment.