%0 Journal Article
%T Study of influential elements on nitrate reduction by nanoscale iron particles integrated with microorganisms<br>纳米铁-微生物耦合体系去除硝酸盐的影响因素研究
%A Dong Meiying
%A An Yi
%A Li Qianqian
%A Li Tielong
%A Jin Zhaohui
%A <br>东美英
%A 安毅
%A 李倩倩
%A 李铁龙
%A 金朝晖
%J 环境工程学报
%D 2010
%I 
%X Use of nanoscale zero-valent iron(NZVI) integrated with Alcaligenes eutrophus for nitrate reduction has been proved to counterbalance the shortages associated with traditional denitrification processes and maintain the unique features of nanoparticle technology such as higher surface energies and functionality in suspensions. Based on the former research that nitrate was found to be removed completely by NZVI particles combined with A. eutrophus with a lower reduction rate but generate a smaller proportion of ammonium, batch tests were conducted in the system to investigate the factors affecting the removal of nitrate, such as pH, temperature as well as DO. The results indicated that increasing pH did not have a distinguishable effect on the generation of ammonium in the range of pH 7~10, but decreased the reduction rate slightly. With the temperature increasing, the generation of ammonium and the rate of the nitrate removal increased. Moreover, too high or too low DO enhanced the generation of ammonium, so the proper DO may maintain around 0.4 mg/L. However, the rate of the nitrate reduction had no change with increasing DO level in the solution. Therefore, the system under high pH, low temperature and high DO conditions can still remove nitrate, and thus, the integrated system is more practical for in situ groundwater denitrification.
%K nanoscale zero-valent iron
%K nitrate
%K denitrification
%K groundwater<br>纳米铁
%K 硝酸盐
%K 反硝化
%K 地下水
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=92E6F4267FD4CBCB51B1E49E014D8054&jid=3567BD61129AA59043F5DE01F8815DB5&aid=33E7B764304E1865D05678F341CEDCC1&yid=140ECF96957D60B2&vid=E158A972A605785F&iid=708DD6B15D2464E8&sid=3694286FAF8D37E3&eid=0AC9783FD6C67AB3&journal_id=1673-9108&journal_name=环境工程学报&referenced_num=0&reference_num=0