低渗透性介质中DNAPL污染物迁移与修复研究进展  

Research Progress on Migration and Remediation of DNAPL Pollutants in Low-Permeability Media

作　　者：窦健伟 潘玥 徐蓓艺 周峰 DOU Jianwei;PAN Yue;XU Peiyi;ZHOU Feng(College of Transportation Engineering,Nanjing TECH University,Nanjing,Jiangsu 211816)

机构地区：[1]南京工业大学交通运输工程学院,江苏南京211816

出　　处：《地质与勘探》2024年第6期1257-1271,共15页Geology and Exploration

基　　金：国家自然科学基金(编号:42402236);国家重点研发计划重点专项(编号:2023YFC3012102-4)联合资助。

摘　　要：近年来,重非水相流体(Dense Non-Aqueous Phase Liquids,DNAPL)的地下水污染问题日益严重。由于其物化性质稳定且具有界面张力低、密度大、含毒性等特点,在含水介质中易从高渗透区域渗入低渗透区域,因低渗透介质的物理捕获和吸附作用使其成为二次污染源,延长了污染羽的迁移时间,造成更大范围污染,导致修复工作愈发困难。本文首先介绍了监测DNAPL污染物的技术手段,初步认识DNAPL在地下水中的迁移转化形式;其次分析了影响DNAPL迁移的因素,重点总结了在低渗透性介质中DNAPL的迁移规律,并归纳了DNAPL迁移数值模拟技术的发展与应用;同时,探讨了四种DNAPL的修复方法,包括:电阻加热、原位氧化化学修复、生物修复、聚合物修复等。最后对低渗透性介质中DNAPL污染物迁移修复的未来进行展望。In recent years,the problem of groundwater pollution caused by dense non-aqueous phase liquids(DNAPL)has become increasingly severe.Due to its stable physical and chemical properties,low interfacial tension,high density,and toxicity,it is easy to infiltrate from highpermeability areas into low-permeability areas in aqueous media.The physical capture and adsorption of low-permeability media make it a secondary pollution source,prolonging the migration time of pollution plumes and causing larger scale pollution,making remediation work increasingly difficult.This article first introduces the technical means for monitoring DNAPL pollutants,and provides a preliminary understanding of the migration and transformation forms of DNAPL in groundwater.Subsequently,the factors affecting DNAPL migration were analyzed,with a focus on summarizing the migration patterns of DNAPL in low-permeability media.The development and application of numerical simulation techniques for DNAPL migration were also summarized.Four repair methods for DNAPL were explored,including resistance heating,in-situ oxidative chemical repair,biological repair,polymer repair,etc.Finally,the future prospects of DNAPL pollutant migration and remediation in low-permeability media were discussed.

关 键 词：重非水相流体 低渗透性介质 DNAPL迁移 DNAPL修复 数值模拟 反向扩散 

分 类 号：X54[环境科学与工程—环境工程]