Journal
AICHE JOURNAL
Volume 61, Issue 1, Pages 166-176Publisher
WILEY-BLACKWELL
DOI: 10.1002/aic.14625
Keywords
iron oxychloride; hydroxyl radicals; hydrogen peroxide; phenol degradation; Fenton-like catalyst; kinetics
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Funding
- National Science Foundation [21176071, 21106041, 21273070]
- Program for New Century Excellent Talents in university [NCET-12-0852]
- Science and Technology Commission of Shanghai Municipality [11JC1402700, 14230710700]
- Shanghai Natural Science Foundation [11ZR1408400]
- Fundamental Research Funds for the Central Universities
- Chinese Education Ministry 111 project [B08021]
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Iron oxychloride (FeOCl) supported on mesoporous silica (SBA-15), as a Fenton-like solid catalyst for phenol degradation, showed supreme activity for production of hydroxyl radical (HO) by H2O2 decomposition, and the generation capacity was comparable to the conventional Fenton reagent (Fe2++H2O2). The structure of FeOCl was characterized with spectroscopies. The generation of HO species during the reaction was detected using 5,5-dimethyl-1-pyrroline N-oxide trapped electron paramagnetic resonance. Furthermore, the kinetics in detail was driven for the creation and diffusion of HO by H2O2 decomposition over FeOCl, which follows a first-order rate through a two-step reaction. With the combination of the catalyst structure and kinetic parameters, the plausible mechanism for H2O2 decomposition during the oxidative degradation of phenol was rationalized. As a Fenton-like solid catalyst, FeOCl/SBA-15 is a promising alternative for the removal of low-level organic contaminates from water. (c) 2014 American Institute of Chemical Engineers AIChE J, 61: 166-176, 2015
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