桂林理工大学学报2025，Vol.45Issue(2)：243-250,8.DOI:10.3969/j.issn.1674-9057.2025.02.013
基于电阻率法的砂土介质中DNAPL修复过程监测
Monitoring of DNAPL remediation process in sandy column based on electrical resistivity method
摘要
Abstract
In order to explore the feasibility of dynamic monitoring of DNAPL remediation process in sandy col-umn by resistivity method,the effects of surfactant concentration and injection rate on the remediation effect of DNAPL,trichloroethylene(TCE)is selected as a typical heavy non-aqueous liquid(DNAPL)pollutant and so-dium lauryl sulfate(SDS)as a surfactant representative,and the remediation experiment of anionic surfactant SDS rinsing trichloroethylene(TCE)in a one-dimensional sand column is carried out by using an electrical in-strument.The TCE saturation change and cumulative remediation efficiency are calculated from the apparent re-sistivity values and compared with the actual discharge volume.The effects of different surfactant concentrations and rinsing rates on resistivity and TCE remediation effect of sand media are analyzed through resistivity data,and the experimental results show that when increases surfactant concentration or surfactant injection rate,the apparent resistivity and TCE saturation value of the sand column will decrease with the extension of the rinsing time,and the relative error range of different flow rates is-24.509％and 7.337％after comparing the actual discharge volume of TCE with the estimated volume.The relative error range at different concentrations is-27.146％and 0.785％.The remediation effect is the best when the surfactant concentration is 1.0％and the injection rate is 1 mL/min,and the cumulative remediation efficiency reaches 89.48％,indicating that it is fea-sible to monitor the DNAPL remediation process by using resistivity method,which provides a new technical means for monitoring the remediation process of groundwater organic contaminated sites.关键词
砂土介质/重非水相液体/电阻率法/TCE饱和度/地下水修复Key words
sand medium/dense non-aqueous phase liquid/electrical resistivity/TCE saturation/groundwater remediation分类
资源环境引用本文复制引用
汤紫荆,刘汉乐,王奥博,王祖伟,韦江涛..基于电阻率法的砂土介质中DNAPL修复过程监测[J].桂林理工大学学报,2025,45(2):243-250,8.基金项目
国家自然科学基金项目(42277192) （42277192）
第三期广西高等学校千名中青年骨干教师培育计划项目 （）
