title: Heterogeneous photo-Fenton degradation of acid red B over Fe2O3 supported on activated carbon fiber.
abstract: Fe2O3 supported on activated carbon fiber (Fe2O3/ACF) was prepared via an impregnation method and characterized by X-ray diffraction, scanning electron microscopy and BET analysis. The results indicated that Fe2O3 with small particle size was highly dispersed on the surface of the ACF and the introduction of Fe2O3 did not change the ACF pore structure. Fe2O3/ACF exhibited a higher Fenton efficiency for the degradation of acid red B (ARB), especially under simulated solar irradiation. Complete decoloration of the ARB solution and 43% removal of TOC could be achieved within 200 min under optimal conditions. It was verified that more ˙OH radicals were generated in the photo-assisted Fenton process and involved as active species in ARB degradation. FTIR analysis indicated that the degradation of ARB was initiated through the cleavage of -N=N-, followed by hydroxylation and opening of phenyl rings to form aliphatic acids, and further oxidation of aliphatic acids would produce CO2 and H2O. Moreover, Fe2O3/ACF maintained its activity after being reused 4 times and the release of iron from the catalyst was found to be insignificant during the Fenton and photo-Fenton processes, indicating that Fe2O3/ACF had good long-term stability.
authors.affiliation: Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences,China.
authors.forename: Huachun
authors.initials: H
authors.lastname: Lan
authors.affiliation: Department of Municipal and Environmental Engineering, School of Civil Engineering, Beijing Jiaotong University,China.
authors.forename: Aiming
authors.initials: A
authors.lastname: Wang
authors.affiliation: Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences,China. Electronic address: liuruiping@rcees.ac.cn.
authors.forename: Ruiping
authors.initials: R
authors.lastname: Liu
authors.affiliation: Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences,China.
authors.forename: Huijuan
authors.initials: H
authors.lastname: Liu
authors.affiliation: Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences,China.
authors.forename: Jiuhui
authors.initials: J
authors.lastname: Qu
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry / Q000528:radiation effects*; D000077482:Carbon Fiber; D052203:Ferrosoferric Oxide / Q000737:chemistry / Q000528:radiation effects*; D006861:Hydrogen Peroxide / Q000737:chemistry; D008027:Light; D009282:Naphthalenesulfonates / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D000077482:Carbon Fiber; D009282:Naphthalenesulfonates; D014874:Water Pollutants, Chemical; C521611:acid red B; D002244:Carbon; D006861:Hydrogen Peroxide; D052203:Ferrosoferric Oxide
keywords: Acid red B; Degradation; Fe(2)O(3)/ACF; Heterogeneous; Photo-Fenton