title: Acid blue 29 decolorization and mineralization by anodic oxidation with a cold gas spray synthesized Sn-Cu-Sb alloy anode.
abstract: The elevated cost of anodic materials used in the anodic oxidation for water treatment of effluents undermines the real application of these technologies. The study of novel alternative materials more affordable is required. In this work, we report the application of Sn-Cu-Sb alloys as cheap anodic material to decolorize azo dye Acid Blue 29 solutions. These anodes have been synthesized by cold gas spray technologies. Almost complete decolorization and COD abatement were attained after 300 and 600 min of electrochemical treatment, respectively. The influence of several variables such as supporting electrolyte, pH, current density and initial pollutant concentration has been investigated. Furthermore, the release and evolution of by-products was followed by HPLC to better understand the oxidative power of Sn-Cu-Sb electrodes.
authors.affiliation: Laboratório de Eletroquímica Ambiental e Aplicada (LEAA), Institute of Chemistry, Federal University of Rio Grande do Norte, Lagoa Nova, CEP 59078-970, Natal, RN, Brazil.
authors.forename: Edilson
authors.initials: E
authors.lastname: do Vale-Júnior
authors.affiliation: CPT Thermal Spray Centre, Departament d'Enginyeria de Materials, Universitat de Barcelona, Martí i Franquès 1, E-08028, Barcelona, Spain. Electronic address: sdosta@cptub.eu.
authors.forename: Sergi
authors.initials: S
authors.lastname: Dosta
authors.affiliation: CPT Thermal Spray Centre, Departament d'Enginyeria de Materials, Universitat de Barcelona, Martí i Franquès 1, E-08028, Barcelona, Spain.
authors.forename: Irene Garcia
authors.initials: IG
authors.lastname: Cano
authors.affiliation: CPT Thermal Spray Centre, Departament d'Enginyeria de Materials, Universitat de Barcelona, Martí i Franquès 1, E-08028, Barcelona, Spain.
authors.forename: Josep Maria
authors.initials: JM
authors.lastname: Guilemany
authors.affiliation: Laboratório de Eletroquímica Ambiental e Aplicada (LEAA), Institute of Chemistry, Federal University of Rio Grande do Norte, Lagoa Nova, CEP 59078-970, Natal, RN, Brazil. Electronic address: sergigarcia@ub.edu.
authors.forename: Sergi
authors.initials: S
authors.lastname: Garcia-Segura
authors.affiliation: Laboratório de Eletroquímica Ambiental e Aplicada (LEAA), Institute of Chemistry, Federal University of Rio Grande do Norte, Lagoa Nova, CEP 59078-970, Natal, RN, Brazil.
authors.forename: Carlos Alberto
authors.initials: CA
authors.lastname: Martínez-Huitle
mesh_terms: D000497:Alloys / Q000737:chemistry*; D001391:Azo Compounds / Q000032:analysis*; D004396:Coloring Agents / Q000032:analysis*; D004563:Electrochemistry; D004566:Electrodes; D004573:Electrolytes / Q000737:chemistry; D009281:Naphthalenes / Q000032:analysis*; D010084:Oxidation-Reduction; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D000497:Alloys; D001391:Azo Compounds; D004396:Coloring Agents; D004573:Electrolytes; D009281:Naphthalenes; C000611550:Sn-Cu-Sb alloy; D014874:Water Pollutants, Chemical; C469426:acid blue 29
keywords: Dimensional stable anode; Dyes; Electrochemical oxidation; Thermal projection; Wastewater treatment