文献类型：期刊文献

英文题名：Removal of nitrate by zero-valent iron and pillared bentonite

作者：Li, Jianfa[1];Li, Yimin[1];Meng, Qingling[1]

机构：[1]Shaoxing Univ, Dept Chem, Shaoxing 312000, Zhejiang, Peoples R China

年份：2010

卷号：174

期号：1-3

起止页码：188

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000273984000029)、、EI(收录号：20095112560483)、Scopus(收录号：2-s2.0-71849119183)、WOS

基金：This work was supported by the National Science Foundation of China (Grant No. 20977063) and by Natural Science Foundation of Zhejiang Province, China (Grant No. Y506288).

语种：英文

外文关键词：Nitrate; Zero-valent iron; Clay; Reduction; Adsorption

外文摘要：The pillared bentonite prepared by intercalating poly(hydroxo AI(Ill)) cations into bentonite interlayers was used together with Fe(0) for removing nitrate in column experiments. The obvious synergetic effect on nitrate removal was exhibited through uniformly mixing the pillared bentonite with Fe(0). In such a mixing manner, the nitrate was 100% removed, and the removal efficiency was much higher than the simple summation of adsorption by the pillared bentonite and reduction by Fe(0). The influencing factors such as bentonite type, amount of the pillared bentonite and initial pH of nitrate solutions were investigated. In this uniform mixture, the pillared bentonite could adsorb nitrate ions, and facilitated the mass transfer of nitrate onto Fe(0) surface, then accelerated the nitrate reduction. The pillared bentonite could also act as the proton-donor. and helped to keep the complete nitrate removal for at least 10 h even when the nitrate solution was fed at nearly neutral pH. (C) 2009 Published by Elsevier B.V.