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

被引：118
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
来源：
ENVIRONMENTAL POLLUTION | 2011年 / 159卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Organobentonite; Immobilization; Nanoscale zero valent iron; Pentachlorophenol; Removal; CATIONIC SURFACTANTS; WATER; DECHLORINATION; NANOPARTICLES; DEGRADATION; REDUCTION; REMEDIATION; PARTICLES; OXIDATION; PD/FE;
D O I：
10.1016/j.envpol.2011.07.016
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
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.
引用
收藏
页码：3744 / 3749
页数：6
相关论文
共 38 条
[1]   Synergistic effect of cationic surfactants on perchloroethylene degradation by zero-valent iron [J].
Alessi, DS ;
Li, ZH .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2001, 35 (18) :3713-3717
[2]   Pathways and kinetics of chlorinated ethylene and chlorinated acetylene reaction with Fe(O) particles [J].
Arnold, WA ;
Roberts, AL .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2000, 34 (09) :1794-1805
[3]   Comparison of reductive dechlorination of p-chlorophenol using Fe0 and nanosized Fe0 [J].
Cheng, Rong ;
Wang, Jian-long ;
Zhang, Wei-xian .
JOURNAL OF HAZARDOUS MATERIALS, 2007, 144 (1-2) :334-339
[4]   Dechlorination of pentachlorophenol using nanoscale Fe/Ni particles: Role of nano-Ni and its size effect [J].
Cheng, Rong ;
Zhou, Wei ;
Wang, Jian-Long ;
Qi, Daoduo ;
Guo, Lin ;
Zhang, Wei-Xian ;
Qian, Yi .
JOURNAL OF HAZARDOUS MATERIALS, 2010, 180 (1-3) :79-85
[5]   Reduction of vinyl chloride in metallic iron-water systems [J].
Deng, BL ;
Burris, DR ;
Campbell, TJ .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1999, 33 (15) :2651-2656
[6]   Degradation of terbutylazine (2-chloro-4-ethylamino-6-terbutylamino-1,3,5-triazine), deisopropyl atrazine (2-amino-4-chloro-6-ethylamino-1,3,5-triazine), and chlorinated dimethoxy triazine (2-chloro-4,6-dimethoxy-1,3,5-triazine) by zero valent iron and electrochemical reduction [J].
Dombek, T ;
Davis, D ;
Stine, J ;
Klarup, D .
ENVIRONMENTAL POLLUTION, 2004, 129 (02) :267-275
[7]   Observations of 2,4,6-trichlorophenol degradation by ozone [J].
Graham, N ;
Chu, W ;
Lau, C .
CHEMOSPHERE, 2003, 51 (04) :237-243
[8]   Carbothermal synthesis of carbon-supported nanoscale zero-valent iron particles for the remediation of hexavalent chromium [J].
Hoch, Laura B. ;
Mack, Elizabeth J. ;
Hydutsky, Bianca W. ;
Hershman, Jessica M. ;
Skluzacek, Ioanna M. ;
Mallouk, Thomas E. .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2008, 42 (07) :2600-2605
[9]  
[胡六江 HU Liujiang], 2008, [环境科学学报, Acta Scientiae Circumstantiae], V28, P1107
[10]   Degradation of pentachlorophenol with zero-valence iron coupled with microwave energy [J].
Jou, Chih-Ju .
JOURNAL OF HAZARDOUS MATERIALS, 2008, 152 (02) :699-702
1234