铬污染场地修复淋洗工艺应用

Application of Leaching Remediation Process for Chromium-contaminated Site

针对某铬污染场地土壤中六价铬污染严重的问题,通过实验室测试硫酸亚铁、柠檬酸、复合淋洗剂、水等不同淋洗剂的淋洗效果,选用某公司研发的淋洗剂A进行修复,探讨了浓度、淋洗时间等对淋洗效果的影响,并根据试验结果应用于生产实践。实践表明,修复后,铬污染场地土壤中的铬、砷、锌、汞、镍等污染因子均达到标准管制值,各项污染因子去除率均在60%以上,修复效果良好。

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.