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Degradation of aniline catalyzed by heterogeneous Fenton‐like reaction using iron oxide/SiO 2
Author(s) -
Huang YaoHui,
Su ChiaChi,
Yang YunPei,
Lu MingChun
Publication year - 2013
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.10630
Subject(s) - aniline , chemistry , hydrogen peroxide , catalysis , degradation (telecommunications) , decomposition , chemical decomposition , radical , aniline compounds , nuclear chemistry , inorganic chemistry , organic chemistry , telecommunications , computer science
The immobilized iron oxides on quartz granules (SG) were withdrawn from the fluidized bed reactors and then used to catalyze hydrogen peroxide (H 2 O 2 ) from heterogeneous generating hydroxyl radical (•OH). The effects of the reaction conditions including the initial pH, SG loading, and concentrations of aniline on aniline degradation were examined. The experimental result showed that the decomposition of H 2 O 2 decreased with increased concentrations of H 2 O 2 once the concentration of H 2 O 2 increased to more than 0.05 M. The rate constant of aniline degradation ( k obs ) increased when increasing amounts of SG were added. The evidence proved the initial pH = 4–6 in the solution is an optimum condition for the degradation of aniline using SG as a heterogeneous catalyst. The aniline degradation suggested that •OH initially attacked the aromatic ring‐NH 2 bonding of aniline, and the ring opening of aniline was then formed. Results demonstrate that the iron oxides are recyclable, cheaper, and more active. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 187‐192, 2013