摘要
在污染土壤的淋洗/萃取技术中,淋洗剂的选择是决定该技术应用的主要制约因素。大量研究已表明,表面活性剂作为淋洗剂能够有效地去除土壤中的污染物。本文综述了表面活性剂在污染土壤修复中的研究进展。有机污染土壤修复中表面活性剂的作用主要体现在减小了液-固之间的表面张力,当质量浓度增加到临界胶束质量浓度以上时,提高了有机物在水中的溶解度和流动性,从而有机污染得以去除;土壤重金属污染修复中表面活性剂的作用主要体现在离子交换,络合以及吸附作用。
In elution and extraction process of contaminated soil,selection of the eluent is a key factor to restrict application of the process.The research results show that surfactants as the eluent can effectively remove pollutants in contaminated soil.In this paper,research progress in application of surfactants in contaminated soil remediation was introduced.Functions of surfactants for remediation of organic contaminated soil are mainly reflected in reducing liquid-solid tension;when the concentration increases and is above the critical micelle concentration,solubility and fluidity of organic matter in the solution can greatly be improved,which can promote pollutants removal.Functions of surfactants for remediation of soils contaminated by heavy metals are ion exchange,complexing and sorption.
出处
《辽宁化工》
CAS
2012年第4期345-347,共3页
Liaoning Chemical Industry
