多相抽提技术在化工污染地块修复中的应用潜力  

Application potential of multi-phase extraction technology in remediations of chemical contaminated sites

作　　者：申家宁 晏井春[1] 高卫国 钱林波[1] 韩璐[1] 陈梦舫[1] SHEN Jianing;YAN Jingchun;GAO Weiguo;QIAN Linbo;HAN Lu;CHEN Mengfang(Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China;Baowu Group Environmental Resources Technology Co.,Ltd,Shanghai 200000,China)

机构地区：[1]中国科学院南京土壤研究所,中国科学院土壤环境与污染修复重点实验室,南京210008 [2]宝武集团环境资源科技有限公司,上海200000

出　　处：《环境工程学报》2021年第10期3286-3296,共11页Chinese Journal of Environmental Engineering

基　　金：国家重点研发计划资助项目(2019YFC1804002);国家自然科学基金资助项目(42077181,41761134091)。

摘　　要：多相抽提(MPE)技术是采用真空抽取污染区域土壤气体、地下水和非水相液体(NAPL)到地面进行气液相分离及处理,以去除土壤与地下水中有机污染物的一种环境友好型原位修复技术。本研究从水文地质条件和污染物特征2方面阐述了MPE技术在长江经济带下游地区化工污染地块原位修复中的适用性,梳理了MPE技术原位修复污染地块现状及其联用技术的研究进展,并分析了其在长江经济带下游地区化工污染地块中的应用潜力。结果表明,长江经济带下游地区为填土、粉质砂土、粉土、粉质黏土和黏土等中低渗透性地层结构,该区域化工污染地块主要污染物包括多环芳烃、卤代有机化合物、苯系物和石油烃等,MPE技术在长江经济带下游化工污染地块修复中具有较高的适用性。针对部分污染地块低渗透性地层结构和难挥发有机污染物的复合污染特征,需选择合适的联用技术解决修复后期的拖尾现象,以强化MPE技术修复效果。Multi-phase extraction(MPE) technology is an environmental friendly in-situ remediation technology that extracts soil gases, groundwater and non-aqueous liquid phase(NAPL) simultaneously from the ground to the surface, and gas-liquid phase separation and treatment are applied subsequently. The applicability of MPE technology in chemical contaminated sites in the downstream region of Yangtze River Economic Zone was analyzed from the aspects of geological conditions and pollutants characteristics. The current states of insitu remediation by MPE technology and the research progress of its combined technology were summarized in this study. The results indicated that the geological structures were from medium to low permeability in chemical contaminated sites in the downstream region of Yangtze River Economic Zone, including fill, silty sand, silt, silty clay and clay. The main pollutants were polycyclic aromatic hydrocarbon(PAHs), halogenated organic compounds, benzenes and petroleum hydrocarbons. MPE technology had great potential for the remediation of chemically contaminated sites in such area from the data. However, for the sites with low permeability geological structure and combined pollutions with involatile organic contaminants, it was necessary to choose appropriate combined technology to solve the tailing phenomenon in the later stage of MPE process,enhancing the removal efficiency of target contaminants.

关 键 词：多相抽提 长江经济带 化工污染地块 原位修复 

分 类 号：X53[环境科学与工程—环境工程]