原位水力循环修复污染土壤土柱试验研究  

Study of soil column tests on remediation of contaminated soil by using in-situ hydraulic circulation method

作　　者：吴育林 陈展 王哲 王振梁 沈婷婷 Wu Yulin;Chen Zhan;Wang Zhe;Wang Zhenliang;Shen Tingting(SGIDI Engineering Consulting(Group)Co.,Ltd.,Shanghai 200000,China;Shanghai Engineering Research Center of Geo-Environment,Shanghai 200000,China;Shanghai Yingxing Environmental Protection Science and Technology Co.,Ltd.,Shanghai 200000,China)

机构地区：[1]上海勘察设计研究院(集团)有限公司,上海200000 [2]上海环境岩土工程技术研究中心,上海200000 [3]上海迎兴环保科技有限公司,上海200000

出　　处：《工程勘察》2023年第6期38-47,共10页Geotechnical Investigation & Surveying

基　　金：国家重点研发计划(2019YFC1805802);上海科委环境岩土工程技术研究中心项目(15DZ2251300);上海启明星计划(22QB1403700)。

摘　　要：通过现场抽提—回灌(含药剂)地下水实现污染土壤修复是原位水力循环技术的基本思路,但针对该修复方法的研究相对较少。选用上海地区代表性较好的黏质粉土,以石油烃为目标污染物,开展两种针对土柱的水力循环淋洗试验,分别研究去离子水水力作用下和添加表面活性剂水力作用下的有机污染土壤的淋洗效果。研究发现,采用去离子水进行原位水力循环修复过程中,化学需氧量(COD)可作为较好的修复表征指标;采用非离子表面活性剂(吐温80,TW80)可适当考虑COD作为修复表征指标;采用阴离子表面活性剂(十二烷基硫酸钠,SDS)抽注循环过程中仍需寻找合适的表征指标。在表面活性剂淋洗试验中,阴离子表面活性剂的淋洗效果较好,非离子表面活性剂淋洗效果较差,淋洗效果不及去离子水。The remediation of contaminated soil by using the on-site extraction and recharge of groundwater(with chemicals)is the basic idea of in-situ hydraulic cycling technique,however,there are relatively few studies on the remediation method.Two types of leaching tests with hydraulic circulation on soil columns are carried out by using the representative clay silt in Shanghai,and the petroleum hydrocarbons are selected as the target contaminant.It is found that chemical oxygen demand(COD)can be used as a helpful remediation indicator during the in-situ hydraulic cycle repair process with deionized water,and the COD could be also considered as an indicator when using non-ionic surfactants(TW8O);however,it is still necessary to determine reasonable indicators during pumping cycle by using anionic surfactants(SDS).In the surfactant leaching tests,the leaching effect of anionic surfactant is better,while that of non-ionic surfactant is relatively poor,which is not as good as that of the leaching tests effect by using deionized water.

关 键 词：污染场地 水力循环 修复指示指标 土柱试验 石油烃污染 

分 类 号：TU443[建筑科学—岩土工程]