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Photo‐Fenton Oxidation of Azo Dye Reactive Black B Using an Immobilized Iron Oxide as Heterogeneous Catalyst
Author(s) -
Shih YuJen,
Ho ChienHung,
Huang YaoHui
Publication year - 2013
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143012x13503213812643
Subject(s) - catalysis , chemistry , degradation (telecommunications) , radical , dissolution , oxide , reaction rate constant , iron oxide , hydroxyl radical , kinetics , nuclear chemistry , organic chemistry , telecommunications , physics , quantum mechanics , computer science
The heterogeneous oxidation of azo dye Reactive Black B (RBB) by the photo‐Fenton system catalyzed with an immobilized iron oxide, B1 (supported with SiO 2 grain), was investigated. Reactive Black B oxidation was carried out in an expended‐bed reactor in which the effect of B1 dosage on the decolorization and degradation of RBB was examined. Through pseudo‐first‐order kinetic studies, decolorization was found to be faster than degradation with a fixed rate constant ratio. By determining the iron dissolution from B1, RBB oxidation was supposed to mainly occur on the B1 surface, which catalyzed the generation of hydroxyl radicals in the photo‐Fenton reaction. Accordingly, the efficiency of photo‐Fenton could reach 100% and 91.2% of decolorization and degradation, respectively, in 300 minutes.