过硫酸盐高级氧化原位修复地下水中卤代烃污染研究进展  

Research progress on in situ remediation of halogenated hydrocarbon contamination in groundwater by persulfate-based advanced oxidation process

作　　者：何弈雪 秦先超 马伟芳[1] HE Yixue;QIN Xianchao;MA Weifang(Beijing Forestry University,College of Environmental Science and Engineering,Beijing 100091,China;Beijing 80th Middle School,Beijing 100020,China)

机构地区：[1]北京林业大学环境科学与工程学院,北京100083 [2]北京市第八十中学,北京100020

出　　处：《化工进展》2024年第7期4072-4088,共17页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(51678052)。

摘　　要：近年来,地下水卤代烃污染问题日益突出,在多种修复技术中,过硫酸盐(PS)高级氧化技术由于其氧化能力强、反应适用pH范围广、半衰期长且氧化范围广,在水处理界引起了广泛关注。本文先对地下水卤代烃的赋存类型进行了分类,指出国内污染场地检出的卤代烃大部分为重非水相液体(DNAPLs),然后对收集的155个污染地区的卤代烃检出类型和频次进行了统计。对于PS高级氧化技术对卤代烃的降解机制,本文作了详细的分析,大体上分为自由基途径和非自由基途径。由于单一的PS活性不高,因此需要将其活化才能起到较好的氧化效果。在此,总结了金属基催化剂和碳基催化剂的种类和特点。最后讨论了具体应用时PS浓度、无机阴离子、反应初始pH和地下水中天然有机物对反应的影响。与传统的地下水卤代烃修复技术相比,过硫酸盐高级氧化技术可以成为高效清洁的替代技术。The groundwater contamination by halogenated hydrocarbons has gained increasing attention in recent years.Among various available remediation technologies,persulfate(PS)-based advanced oxidation processes have become a promising option in the water treatment community due to their high oxidation capacity,wide range of applicable pH,and long half-life with a wide range of oxidation.In this review,the types of halogenated hydrocarbons commonly detected in groundwater were classified,and dense non-aqueous phase liquids(DNAPLs)were the most frequently detected type of halogenated hydrocarbons in domestically contaminated sites.Next,statistics were presented regarding the types and frequencies of halogenated hydrocarbons identified in a total of 155 sampled contaminated areas.Additionally,this review included a detailed analysis of the degradation mechanism of PS-based advanced oxidation processes,which was categorized into two pathways:free radical and non-free radical.Given the low activity of single PS,activation was required to achieve optimal oxidation performance,and this review summarized the properties and characteristics of metal-based and carbon-based catalysts.Lastly,the effects of various factors on the reaction in specific applications were discussed,including PS concentration,inorganic anions,initial pH of the reaction,and the presence of natural organic matter in groundwater.PS-based advanced oxidation processes had the potential to be an efficient and environmentally friendly alternative to conventional groundwater halogenated hydrocarbon remediation technologies.

关 键 词：地下水污染 卤代烃污染 过硫酸盐高级氧化 自由基 非自由基途径 催化剂 

分 类 号：X5[环境科学与工程—环境工程]