摘要
某化工生产场地受到了苯系物的污染,并在现场浅层地下水上方形成了由甲苯构成的轻质非水相流体层。采用原位单泵双相抽提技术对该场地进行了修复的中试研究。结果表明,双相抽提技术能通过真空作用同时去除场地中的自由相污染物、受污染的地下水以及受污染的土壤气体,可有效适用于中～低渗透性场地LNAPL污染的原位修复;直接回收自由相污染物是双相抽提工艺修复场地LNAPL污染的主要途径。
One chemical industrial production site was contaminated by benzene homologues and light non-aqueous liquid phase （LNAPL） layer constituted by toluene was formed above shallow groundwater level onsite. In situ dual phase extraction （DPE） technology with single pump mode was adopted for the pilot test study of site remediation. Study results showed that DPE technology was able to remove free phase contaminant,contaminated groundwater and soil vapor simultaneously from subsurface by its vacuum function and could be applied to the in situ remediation of LNAPL contamination on low to moderate permeability site effectively. Direct recovery of free phase contaminant was the main approach of DPE for LNAPL remediation.
出处
《环境科技》
2012年第6期35-37,共3页
Environmental Science and Technology
