Sustainable Mining and Metallurgy

On the serious soil contamination by chromium (VI) in some chromium-contaminated site, the leaching performance of different leaching solutions, such as ferrous sulfate, citric acid, leaching solution A and water, was tested in laboratory and the leaching solution A developed by some company was selected for remediation. Effects of concentration, leaching duration, etc. on the leaching efficiency were discussed and the product was applied in production practice based on test results. Practice reveals that pollution factors such as chromium, arsenic, zinc, mercury and nickel in the chromium-contaminated site soil are reduced within standard control limits after remediation. The leaching efficiency of pollution factors are all higher that 60%, indicating effective remediation.