复合功能材料原位修复氯代烃污染地下水的长效性研究  

Research on the long⁃term effectiveness of composite functional materials for in⁃situ remediation of chlorinated hydrocarbon contaminated groundwater

作　　者：刘翠翠 唐卫杰[1,2] 张满成 王水[1,2] 郭红岩 Liu Cuicui;Tang Weijie;Zhang Mancheng;Wang Shui;Guo Hongyan(Jiangsu Provincial Academy of Environmental Science,Jiangsu Provincial Key Laboratory of Environmental Engineering,Nanjing,210036,China;Jiangsu Province Engineering Research Center of Soil and Groundwater Pollution Prevention and Control,Nanjing,210036,China;Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences,Nanjing,210008,China;State Key Laboratory of Pollution Control and Resource Reuse,School of Environment,Nanjing University,Nanjing,210023,China)

机构地区：[1]江苏省环境科学研究院,江苏省环境工程重点实验室,南京210036 [2]江苏省土壤与地下水污染防控工程研究中心,南京210036 [3]土壤环境与污染修复重点实验室,中国科学院南京土壤研究所,南京210008 [4]污染控制与资源化研究国家重点实验室,南京大学环境学院,南京210023

出　　处：《南京大学学报（自然科学版）》2024年第4期683-691,共9页Journal of Nanjing University（Natural Science）

基　　金：江苏省重点研发计划(BE2021706);江苏省环保科研课题(2019001);江苏省卓越博士后计划(2022ZB779);江苏省科技计划社会发展项目(BE2021731)。

摘　　要：针对我国地下水氯代烃污染问题,以椰壳生物炭和零价铁为主要原材料,研制了一种具有生物活性的复合功能材料,并在江苏某氯代烃污染地下水场地开展了中试研究.现场监测数据显示,复合功能材料可持续缓释碳源和铁源,能够实现脱氯降解菌驯化生长.通过16S rRNA基因测序发现,可渗透反应墙(Permeable Reactive Barrier,PRB)运行1140天时,复合功能材料中脱氯降解菌的相对丰度(1.9%~8.3%)高于初始PRB材料(0.5%).PRB运行1140天后,复合功能材料的表面形态仍保持稳定.在2000天的运行周期内,PRB对不同氯代烃污染物的去除率为13.7%~100%.复合功能材料可通过吸附、铁还原和微生物降解复合机制高效去除地下水中的氯代烃.研究可为氯代烃污染地下水原位修复提供重要技术支撑.In order to remediate chlorinated hydrocarbons contaminated groundwater,a bioactive composite functional material was developed with coconut shell biochar and zero⁃valent iron as main raw materials.A field pilot test was performed to treat chlorinated hydrocarbons contaminated groundwater at a site in Jiangsu province.The field monitoring data revealed that the composite functional material could continuously release organic carbon and iron,facilitating the growth of dechlorinating bacteria.The 16S rRNA gene sequencing showed that after 1140 days of PRB operation,the relative abundance of dechlorinating bacteria in the composite functional materials(1.9%~8.3%)was higher than that in the initial PRB material(0.5%).During 1140 days of PRB operation,the surface morphology of the composite functional material remained stable.The removal efficiencies of various chlorinated hydrocarbons compounds by PRB ranged from 13.7%to 100%during the 2000⁃day operation period.The composite functional material can effectively remove chlorinated hydrocarbons from groundwater through the combined mechanism of adsorption,iron reduction and microbial degradation.The research could provide important technical support for the in⁃situ remediation of groundwater contaminated with chlorinated hydrocarbons.

关 键 词：复合功能材料 可渗透反应墙 地下水 氯代烃 

分 类 号：X523[环境科学与工程—环境工程]