地下水中SO_4^(2-)和Cl^-对Fe^0降解TCE的效应研究  

Effect of Sulfate and Chloride Ion in Groundwater on TCE Degradation by ZVI-PRB

作　　者：张晓庆[1,2] 朱雪强[3] 卜丹阳[1,2] 许映军[1] 陈强[1,2] 

机构地区：[1]北京师范大学地表过程与资源生态国家重点实验室,北京100875 [2]北京师范大学民政部/教育部减灾与应急管理研究院,北京100875 [3]中国矿业大学环境与测绘学院,江苏徐州221008

出　　处：《环境科学与技术》2011年第11期46-49,82,共5页Environmental Science & Technology

基　　金：国家自然科学基金项目(40801230);高校博士点基金课题资助(20090003110025);地表过程与资源生态国家重点实验室项目资助(2009-RC-01)

摘　　要：文章基于渗透反应墙技术,通过实验室柱实验分析不同浓度的SO42-和Cl-单独作用下Fe0降解TCE的效果。结果表明:在相同Fe0条件下,随SO42-浓度增大,出水口TCE去除率提高,且SO42-在TCE降解反应中由抑制作用逐渐转换为促进作用;此外随Cl-浓度增大,出水口TCE去除率呈下降趋势,且Cl-在TCE降解反应中由促进作用逐渐转变为抑制作用;同时研究结果表明,Fe0反应柱对Cl-具有一定吸附作用。Column experiments were done to determine effects of sulfate and chloride ion on TCE degradation by ZVI-PRB.Results showed that sulfate and chloride ion had a dual effect on TCE degradation in the system of ZVI-PRB.As sulfate concentration increased,the efficiency of TCE degradation got better.Sulfate could inhibit the reaction when its concentration was low,however,when its concentration increased,sulfate had a promoting action to the reaction.As chloride ion concentration increased,the efficiency of TCE degradation became worse.When there was a low concentration,chloride ion had a promoting action to the reaction,and when its concentration increased,chloride ion could inhibit the reaction.The study showed that the experiment column can adsorb chloride ion.

关 键 词：TCE Fe0 PRB 地下水 

分 类 号：X523[环境科学与工程—环境工程]