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.
出处
《安徽农业科学》
CAS
北大核心
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)
