Degradation of trichloroethylene by Fe(II) chelated with cross-linked chitosan in a modified Fenton reaction

被引：79

作者：

Lee, Youngmin ^{[1
]}

Lee, Woojin ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Civil & Environm Engn, Taejon 305701, South Korea

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 178卷 / 1-3期

关键词：

Modified Fenton reaction; Cross-linked chitosan; Fe(II) chelation; Neutral pH; TCE; SUPPORTED PALLADIUM CATALYST; HYDROGEN-PEROXIDE; AQUEOUS-SOLUTION; CHEMICAL OXIDATION; CONTAMINATED SOILS; IONS; DYES; TRANSFORMATION; REMEDIATION; CHEMISTRY;

D O I：

10.1016/j.jhazmat.2010.01.062

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Degradation of trichloroethylene (TCE) by a modified Fenton reaction was investigated in aqueous solution. Fenton reaction can be significantly enhanced in the presence of Fe(II) chelated by cross-linked chitosan (CS) with glutaraldehyde (GLA) at neutral pH. A remarkable oxidative degradation of TCE (1.838 h(-1)) was observed in the modified Fenton system with Fe(II)-CS/GLA (10 mM and 2 g L-1, respectively) and H2O2 (318 mM), while no significant degradation (0.005 h(-1)) was observed in the classic Fenton reaction system with Fe(II) (10 mM) and H2O2 (318 mM) at pH 7 in 5 h. The kinetic rate constants for the degradation of ICE in the modified Fenton system was dependent on the initial suspension pH, Fe(II) loading, CS/GLA dosage, and concentration of H2O2. We observed the formation of surface Fe(II)CS/GLA complex using microscopic analyses and identified Fe oxidation (Fe(II) to Fe(III)) coupled with H2O2 reduction on the Fe(II)-CS/GLA surfaces during the modified Fenton reaction. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：187 / 193

页数：7

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