title: Decolorization of reactive dye using a photo-ferrioxalate system with brick grain-supported iron oxide.
abstract: The photocatalytic activity of a brick grain-supported iron oxide (denoted as B1) was tested for its activity to degrade Reactive Black 5 (RB5) in the presence of oxalic acid. B1 was obtained as a solid waste from a wastewater treatment plant, and characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray powder diffraction (XRD) and N(2) adsorption/desorption isotherm analyses. The decolorization experiments were performed in a fluidized bed reactor with aeration under UV-A irradiation (λ = 365 nm). The effects of various factors such as solution pH, concentration of oxalic acid and dissolved oxygen on the decolorization of RB5 were evaluated considering the contributions of adsorption and photo-catalytic degradation. The role of dissolved iron in the removal of RB5 and the stability of B1 were also examined. In addition, the removal of TOC during the photo-catalytic reaction was monitored.
authors.affiliation: Department of Chemical Engineering, National Cheng Kung University, Tainan City 701, Taiwan.
authors.forename: Hui-Pin
authors.initials: HP
authors.lastname: Cheng
authors.forename: Yao-Hui
authors.initials: YH
authors.lastname: Huang
authors.forename: Changha
authors.initials: C
authors.lastname: Lee
mesh_terms: D000327:Adsorption; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry* / Q000528:radiation effects; D005290:Ferric Compounds / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste / Q000517:prevention & control*; D009282:Naphthalenesulfonates / Q000737:chemistry* / Q000528:radiation effects; D010070:Oxalates / Q000737:chemistry*; D019815:Oxalic Acid; D010100:Oxygen; D010782:Photolysis; D018508:Water Purification / Q000379:methods
chemical_list: D004396:Coloring Agents; D005290:Ferric Compounds; D007220:Industrial Waste; D009282:Naphthalenesulfonates; D010070:Oxalates; C034942:ferrioxalate; C000499:ferric oxide; D019815:Oxalic Acid; C063421:Remazol black B; D010100:Oxygen