期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 178, 期 1-3, 页码 187-193出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2010.01.062
关键词
Modified Fenton reaction; Cross-linked chitosan; Fe(II) chelation; Neutral pH; TCE
资金
- MOE [141-081-030]
- KRF [2007-313-D00439]
- NRF [2009-0090376]
- Korea Environmental Industry & Technology Institute (KEITI) [0520101700300260] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2009-0090376, 2007-313-D00439] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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