高校地质学报2018，Vol.24Issue(1)：109-115,7.DOI:10.16108/j.issn1006-7493.2017054
Fe2+在零价铁还原去除NO3-中的作用效应
Effect of Fe2+on Nitrate Reduction Using Zero-valent Iron
摘要
Abstract
Zero-valent iron(Fe0)was widely used for in-situ and ex-situ remediation of nitrate in groundwater,however,it remained to be studied that how existing of Fe2+worked in the reduction of nitrate by Fe0which was covered by iron oxides.In this study,batch experiments were conducted to investigate the effect of Fe2+on NO3- reduction using 100 mesh untreated zero-valent iron(Fe0) as reductant.The results showed that,Fe2+could significantly enhance the removal rate and removal efficiency of NO3-in the presence of Fe0,and the removal efficiency increased with elevated Fe2+concentration;but the reaction experienced an initial stage of low rate due to the existence of oxide film on the Fe0surface.Fe2+could directly revolved in the reaction and transformed Fe2O3which covers the Fe0 to Fe3O4,which accelerates the transfer of electrons from Fe0to NO3-and promote the reduction of nitrate.What's more,the removal efficiency of NO3-by Fe0will be further improved while adding Fe3O4into the reaction system,however,with the absence of Fe2+,the adding of Fe3O4only will not influence the reduction efficiency by Fe0.关键词
零价铁/Fe2+/Fe3O4/硝酸盐还原/地下水Key words
zero-valent iron/Fe2+/Fe3O4/nitrate reduction/groundwater分类
资源环境引用本文复制引用
陈欢,张亚平,阮晓红..Fe2+在零价铁还原去除NO3-中的作用效应[J].高校地质学报,2018,24(1):109-115,7.基金项目
国家水体污染控制与治理专项(2012ZX07204-003) （2012ZX07204-003）
