文献类型：期刊文献

中文题名：零价铁-厌氧活性污泥耦合降解三氯乙烷和二恶烷复合污染

英文题名：Degradation of Trichloroethane and Dioxane Co-contamination Via a ZVI-Anaerobic Microbe Combined System

作者：范利花[1];李辉[1];林匡飞[1];刘勇弟[1]

机构：[1]华东理工大学资源与环境工程学院,上海200237

年份：2016

卷号：42

期号：1

起止页码：72

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金(51378208;41273109)

语种：中文

中文关键词：三氯乙烷;二恶烷;零价铁;复合污染;耦合降解

外文关键词：trichloroethane; dioxane; zero-valent iron; co-contamination; combined degradation

摘要：针对地下水中常见的三氯乙烷(TCA)和二恶烷复合污染的去除问题,在升流式厌氧反应器中构建零价铁-厌氧活性污泥耦合体系,深入研究了耦合体系对TCA和二恶烷的降解特性,并对降解动力学及菌群多样性进行了分析,探究了耦合降解机制。研究表明,耦合体系极大地提高了TCA和二恶烷的降解率,使之分别达到97.5%和92.0%,且降解过程符合准一级反应动力学。TCA通过零价铁还原脱氯生成氯乙烷。最后通过研究零价铁腐蚀产物与微生物菌群结构得到了耦合降解机制。
In consideration of the removal of common co-contamination of trichloroethane（TCA） and dioxane in the groundwater, a zero-valent iron （ZVI）-anaerobic sludge combined system in an upflow anaerobic sludge blanket （UASB） reactor was established. The degradation characteristics of the combined system for TCA and dioxane were studied. The degradation kinetics and bacterial diversity to explore the combined mechanism of degradation were analyzed. The results showed that the combined system improved the biodegradation rate of TCA and dioxane significantly with removal percentages of 97.5 % and 92.0 %, respectively,and the degradation of the dioxane-TCA complex was consistent with first-order reaction kinetics. Chloroethane （CA） was generated from TCA through reductive dechlorination of ZVI. The ZVI corrosion products and microbial community structure were studied to elucidate the combined mechanism.