Simultaneous adsorption and degradation of γ-HCH by nZVI/Cu bimetallic nanoparticles with activated carbon support

被引：153
作者：
Chang, Chun [1 ,2 ]
Lian, Fei [1 ,2 ]
Zhu, Lingyan [1 ,2 ]
机构：
[1] Nankai Univ, Key Lab Pollut Proc & Environm Criteria, Minist Educ, Coll Environm Sci & Engn, Tianjin 300071, Peoples R China
[2] Nankai Univ, Coll Environm Sci & Engn, Key Lab Urban Ecol Environm Remediat & Pollut Con, Tianjin 300071, Peoples R China
来源：
ENVIRONMENTAL POLLUTION | 2011年 / 159卷 / 10期
关键词：
Bimetallic nanoparticles; Activated carbon; gamma-Hexachlorocyclohexane; Dechlorination; Reaction mechanism; NANOSCALE ZEROVALENT IRON; ZERO-VALENT IRON; REDUCTIVE DECHLORINATION; RAPID DECHLORINATION; CHLORINATED METHANES; CONTAMINANT REMOVAL; METALLIC IRON; PD/FE; HEXACHLOROCYCLOHEXANE; KINETICS;
D O I：
10.1016/j.envpol.2011.06.021
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Cu amended zero valent iron bimetallic nanoparticles were synthesized by doping Cu on the surface of iron. They were incorporated with granular activated carbon (AC) to prepare supported particles (AC-Fe-0-Cu), which were used to remove gamma-HCH. Cu on the surface of iron enhanced the dechlorination activity of Fe-0. The dechlorination rate constant (k(obs)) increased with the Cu loading on the surface of iron and the maximum was achieved with 6.073% Cu. AC as a support was effective for increasing the dispersion of the nanoparticles and avoiding the agglomeration of the metallic nanoparticles. The simultaneous adsorption of gamma-HCH on AC accelerated the degradation rate of gamma-HCH by the bimetals. After reaction for 165 min, around 99% of gamma-HCH was removed by the solids of AC-Fe-0-Cu. In addition, AC could adsorb the degradation products. The degradation of y-HCH was mainly through dehydrochlorination and dichloroelmination based on the intermediate products detected by GC/MS. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2507 / 2514
页数：8
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