电动修复技术在六价铬污染土壤治理中的应用探讨

Discussion on the application of electric remediation technology in the treatment of hexavalent chromium contaminated soil

电动修复是一项经济有效的去除污染场地中土壤六价铬的方法。与去离子水相比,电解液中使用KCl、柠檬酸和聚天冬氨酸可有效提高Cr6+的去除率。pH和土壤性质也将影响的Cr6+去除效率。有机酸中的a-OH和–COOH功能团的存在及数量在Cr6+还原中起着重要作用。最终,建议进一步研究电动修复技术在工程中的有效应用。

The electrokineticremediation was an economic and effective way to remove chromium(Ⅵ)from soilin contaminated site.Compared with deionized water,the use of kcl,citric acid and polyaspartic acid in the electrolyte can effectively improve the removal of Cr6+.pH and Soil properties will also affect the removal efficiency of Cr6+.The numbers of a-OH and–COOH groups in organic acidsplay an important role in the Cr6+reduction.Finally,it is suggested to further study the effective application of electrokinetic remediation in engineering application.