两种PRB反应介质去除地下水中硝酸盐效果对比  

The Contrast about Removal Effects on Nitrate in Groundwater for Two Reaction Medium of PRB

作　　者：杨维[1] 施爽[1] 李璇 封金利[1] 沈爱莲[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]辽宁省环境科学研究院,辽宁沈阳110168

出　　处：《安徽农业科学》2011年第9期5172-5174,共3页Journal of Anhui Agricultural Sciences

基　　金：辽宁省省级重点实验室(高校)开放基金资助课题(SZ-200908);辽宁省自然科学基金(20072012);建设部重点科技项目(2007-K4-24)

摘　　要：[目的]研究可渗透反应屏(PRB)技术不同介质对地下水中硝酸盐的去除效果。[方法]模拟地下水环境,以硝酸盐污染的地下水为研究对象,设计2个PRB反应器,分别采用负载生物介质、零价铁-活性炭两组反应材料作为PRB装置的反应介质,考察其对污染的地下水中硝酸盐的去除效果。[结果]当水温为13～15℃、PH值7.2～7.5时,负载生物介质硝酸氮去除率可持续达到90%左右,COD的去除率也稳定保持在80%左右;零价铁-活性炭反应介质硝酸氮去除率稳定停留在50%左右,COD得去除率保持在15%～30%之间。[结论]负载生物介质的去除效果更稳定,相对较好,以负载生物介质作为反应材料的PRB用于原位浅层地下水中硝酸盐污染的治理具有潜在的应用价值。[Objective]The aim was to research the removal effects on nitrate in groundwater for different reaction medium of PRB.[Method]According to the simulated groundwater and with the nitrate contamination of groundwater as material,the removal effects on nitrate in groundwater for immobilized microorganisms and zero-valent iron and activated carbon reaction mediums of PRB were reviewed.[Result]The results showed that when the water temperature is 13-15 ℃ and pH 7.2-7.5,nitrate removal rate of immobilized microorganisms could sustainably achieve 90%,COD removal rate was also maitained at 80%;nitrate removal rate of zero-valent iron and activated carbon reaction medium maitained 50%,COD removal rate was 15%-30%.[Conclusion]The removal rate of Immobilized microorganisms was higher and better.so the PRB with immobilized microorganisms as reaction media had potential applications for the treatment of nitrate polluted groundwater.

关 键 词：可渗透反应墙 硝酸盐 反应介质 去除效果 

分 类 号：X52[环境科学与工程—环境工程]