title: Comparison of several advanced oxidation processes for the decolorization of Reactive Red 120 azo dye in aqueous solution.
abstract: In this study UV/TiO2, electro-Fenton (EF), wet-air oxidation (WAO), and UV/electro-Fenton (UV/EF) advanced oxidation processes (AOPs) have been applied to degrade Reactive Red 120 (RR120) dye in aqueous solution. The most efficient method on decolorization and mineralization of RR120 was observed to be WAO process. Photocatalytic degradation of RR120 by UV/TiO2 have been studied at different pH values. At pH 3 photocatalytic degradation kinetics of RR120 successfully fitted to Langmuir-Hinshelwood (L-H) kinetics model. The values of second order degradation rate (k") constant and adsorption constant (K) were determined as 4.525 mg L(-1) min(-1) and 0.387 L mg(-1), respectively. Decolorization efficiency observed in the order of WAO > UV/TiO2 = UV/EF > EF while WAO > UV/TiO2 > UV/EF > EF order was observed in TOC removal (mineralization). For all AOPs, it was found that degradation products in reaction mixture can be disposed safely to environment after 90 min treatment.
authors.affiliation: Chemistry Department, Arts and Sciences Faculty, Cukurova University, 01330 Balcali, Adana, Turkey. erdalkusvuran@yahoo.com
authors.forename: Erdal
authors.initials: E
authors.lastname: Kusvuran
authors.forename: Osman
authors.initials: O
authors.lastname: Gulnaz
authors.forename: Sibel
authors.initials: S
authors.lastname: Irmak
authors.forename: Osman M
authors.initials: OM
authors.lastname: Atanur
authors.forename: H Ibrahim
authors.initials: HI
authors.lastname: Yavuz
authors.forename: Oktay
authors.initials: O
authors.lastname: Erbatur
mesh_terms: D000327:Adsorption; D003116:Color; D006256:Hazardous Waste / Q000517:prevention & control*; D006863:Hydrogen-Ion Concentration; D010084:Oxidation-Reduction; D010777:Photochemistry / Q000379:methods; D012996:Solutions; D014227:Triazines / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D006256:Hazardous Waste; D012996:Solutions; D014227:Triazines; D014867:Water; C042516:reactive red 120 dye