采用零价铁-缓释碳修复氯代烃污染地下水的中试研究  

A FIELD PILOT TEST FOR RESTORING CHLOROHYDROCARBON CONTAMINATED GROUNDWATER USING ZVI & CONTROLLED RELEASING CARBON MATERIAL

作　　者：李书鹏 刘鹏 杜晓明[2] 杜郁[3] 

机构地区：[1]北京建工环境修复有限责任公司,北京100045 [2]中国环境科学研究院,北京100012 [3]北京建工环境发展有限责任公司,北京100192

出　　处：《环境工程》2013年第4期53-58,共6页Environmental Engineering

摘　　要：针对受氯代烃污染的地下含水层,采用零价铁-缓释碳技术进行修复中试研究。中试期间,向地下9～18 m受氯代烃污染的含水层(体积900 m3)注入7 200 kg零价铁-缓释碳药剂。对地下水中污染物进行定期监测,结果显示:零价铁-缓释碳技术可以高效地将地下含水层中的氯代烃污染物脱氯降解。其中1,2-二氯乙烷的去除率达99.90%以上,1,1-二氯乙烷的去除率达86.00%以上,氯仿的去除率达98.00%以上。在零价铁-缓释碳还原体系存在的条件下,1,2-二氯乙烷、1,1-二氯乙烷和氯仿三种污染物的半衰期分别为46,115,70 d。研究证明:零价铁-缓释碳技术可以高效地修复被氯代烃污染的地下含水层,并且修复期较短,对氯代烃类污染场地地下水的修复有重要的实用价值。A field pilot test was performed to treat a chlorohydrocarbon contaminated groundwater using Zero Valent Iron and Controlled-Release Carbon（ZVI-CRC） reagent.7200 kg of reagent was injected from 9 to 18 m below ground surface.The treated volume of aquifer was about 900 m3.The monitoring data showed that the chlorohydrocarbon could be effectively dechlorinated by ZVI-CRC material.The removal rate of 1,2-Dichloroethane was over 99.9%,the 1,1-Dichloroethane removal rate was over 86.0% and the chloroform was over 98.0%.The half-life of the three contaminants were 46,115 and 70 d respectively.The test proved that ZVI-CRC reagent could dechlorinate the chlorohydrocarbon rapidly and was of great value in the remediation of chlorohydrocarbon contaminated sites.

关 键 词：氯代烃 含水层 零价铁-缓释碳药剂 脱氯降解 

分 类 号：X523[环境科学与工程—环境工程]