Effects of various ions on the dechlorination kinetics of hexachlorobenzene by nanoscale zero-valent iron

被引：87
作者：
Su, Yuh-fan [1 ]
Hsu, Chung-yu [1 ]
Shih, Yang-hsin [1 ]
机构：
[1] Natl Taiwan Univ, Dept Agr Chem, Taipei 106, Taiwan
来源：
CHEMOSPHERE | 2012年 / 88卷 / 11期
关键词：
Hexachlorobenzene (HCB); Nanoscale zero-valent iron (NZVI); Degradation; Cations; Anions; NITRATE REDUCTION; GRANULAR IRON; CARBON-TETRACHLORIDE; CORROSION PRODUCTS; ZEROVALENT IRON; PARTICLES; TRICHLOROETHYLENE; NANOPARTICLES; REACTIVITY; DEHALOGENATION;
D O I：
10.1016/j.chemosphere.2012.05.036
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The effect of several anions and cations normally co-present in soil and groundwater contamination sites on the degradation kinetics and removal efficiency of hexachlorobenzene (HCB) by nanoscale zero-valent iron (NZVI) particles was examined. The degradation kinetics was not influenced by the HCO3-, Mg2+, and Na+ ions. It was enhanced in the presence of the Cl- and SO42- ions due to their corrosion promotion. The NO3- competes with HCB so it inhibits the degradation reaction. The Fe2+ ions would inhibit the degradation reaction due to passivation layer formed, while it was enhanced in the presence of Cu2+ ions resulted from the reduced form of copper on NZVI surfaces. These observations lead to a better understanding of HCB dechlorination with NZVI particles and can facilitate the remediation design and prediction of treatment efficiency of HCB at remediation sites. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1346 / 1352
页数：7
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