土壤修复过程中地下水渗滤风险研究进展

Research Progress of Groundwater Leachate Risk During Soil Remediation

土壤修复是通过物理、化学或生物等方法固定、转移、吸收、降解或转化土壤中的污染物,使其含量降低到可接受的水平,或将有毒有害的物质转换为无害物质的过程。但是"修复"不当将成为一场转嫁行为,对地下水造成渗滤风险。该研究阐述了土壤修复技术中的物理修复、化学修复以及生物修复等过程中可能会对地下水造成的渗滤风险和风险评估方法,并就缓释螯合剂在土壤修复过程中对重金属释放的调控作用,降低对地下水渗滤风险进行了介绍,最后总结出土壤修复的未来发展方向。

Soil remediation is the process of fixing,transferring,absorbing,degrading or transforming contaminant in the soil by physical,chemical or biological means,which will reduce the content to an acceptable level or convert toxic and harmful substances into harmless substances.However,improper‘repair’will become a pass-through behavior and cause the risk of leachate of groundwater.In this review,the leachate risk and the risk assessment methods for groundwater during physical restoration,chemical remediation,and bioremediation process in soil remediation techniques were reviewed.The regulation of the release of heavy metals from the slow release chelating agent during soil remediation and the reduction of the risk of groundwater leachate were introduced.Finally,the future development direction of soil remediation was summarized.