水-土环境有机污染表面活性剂增效修复技术

Surfactant Enhanced Remediation Technology of NAPLs Contaminated Soil and Groundwater

加入表面活性剂溶液可以增溶土壤中的污染物,提高其流动性和去除效率,并缩短处理时间。表面活性剂的应用受到现场条件的制约,现场应用时要考虑其增溶效果和界面张力的降低。表面活性剂与其它修复技术联合应用进行增效修复,可应用于现场(insitu)修复和现场外(ex situ)修复。表面活性剂可用于促进大范围污染物的去除,已应用于PCE,BTEX化合物,VOCs,SVOCs,PCBs及氯化溶剂的去除和现场修复。处理后,废液中的表面活性剂可回收利用。生物表面活性剂在地下水和土壤增效修复中具有较大的应用潜力。

Addition of surfactant solution can enhance the solubility and mobility of NAPLs and the removal efficiency, and shorten the remediation time. The application of surfactant is restricted by conditions of the site. The solubilization and the decrease of interfacial tension should be considered in the application of the site specific studies. Surfactants are typically used in conjunction with other remediation technologies as an enhancement. It can be used in both ex situ and in situ arrangements Surfactants can be used to aid in the removal of a wide range of contaminants They have been used to remove Chlorinated solvents, BTEX compounds, VCK2s, SVOCs, and PCBs and in-situ remediation Surfactant can be recycled and reused in the remediation process Biosurfactants have a potential application in the remediation of soil and groundwater.