文献类型：期刊文献

英文题名：Enhanced removal of pentachlorophenol by a novel composite: Nanoscale zero valent iron immobilized on organobentonite

作者：Li, Yimin[1];Zhang, Yun[1,2,3];Li, Jianfa[1];Zheng, Xuming[2,3]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China;[2]Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Zhejiang, Peoples R China;[3]Zhejiang Sci Tech Univ, State Key Lab ATMMT MOE, Hangzhou 310018, Zhejiang, Peoples R China

年份：2011

卷号：159

期号：12

起止页码：3744

外文期刊名：ENVIRONMENTAL POLLUTION

收录：SCI-EXPANDED(收录号：WOS:000296397300062)、、EI(收录号：20114114421830)、Scopus(收录号：2-s2.0-80053654159)、WOS

基金：This work was supported by the National Natural Science Foundation of China (20977063, 21047005).

语种：英文

外文关键词：Organobentonite; Immobilization; Nanoscale zero valent iron; Pentachlorophenol; Removal

外文摘要：Nanoscale zero valent iron (NZVI) was immobilized on the organobentonite (CTMA-bent), so as to enhance the reactivity of NZVI and prevent its aggregation. This novel composite (NZVI/CTMA-Bent) was characterized by transmission electron microscope and X-ray diffraction. Good dispersion of NZVI particles on the bentonite was observed. Its performance on removing pentachlorophenol (PCP) was investigated by batch experiments. Results showed NZVI/CTMA-Bent could rapidly and completely dechlorinate PCP to phenol with an efficiency of 96.2%. It was higher than the sum (54.5%) of reduction by NZVI (31.5%) and adsorption by CTMA-Bent (23.0%) separately. The kinetic studies indicated the removal rate of PCP was positively related to the adsorption. We proposed that the adsorption of PCP by CTMA-Bent enhanced the mass transfer of PCP from aqueous to iron surface. Besides, NZVI/CTMA-Bent exhibited good stability and reusability, and CTMA-Bent could also reduce the amount of iron ions released into the solution. (C) 2011 Elsevier Ltd. All rights reserved.