title: Photo-assisted electrochemical degradation of simulated textile effluent coupled with simultaneous chlorine photolysis.
abstract: The influence of chloride ion concentration during the photo-assisted electrochemical degradation of simulated textile effluent, using a commercial Ti/Ru0.3Ti0.7O2 anode, was evaluated. Initially, the effect of applied current and supporting electrolyte concentration on the conversion of chloride ions to form reactive chlorine species in 90 min of experiment was analyzed in order to determine the maximum production of reactive chlorine species. The optimum conditions encountered (1.5 A and 0.3 mol dm(-3) NaCl) were subsequently employed for the degradation of simulated textile effluent. The efficiency of the process was determined through the analysis of chemical oxygen demand (COD), total organic carbon (TOC), of the presence of organochlorine products and phytotoxicity. Photo-assisted electrochemical degradation was more efficient for COD and TOC removal than the electrochemical technique alone. With simultaneous UV irradiation, a reduced quantity of reactive chlorine was produced, indicating that photolysis of the chlorine species led to the formation of hydroxyl radicals. This fact turns a simple electrochemical process into an advanced oxidation process.
authors.affiliation: Programa de Mestrado Profissional em Inovação Tecnológica, Universidade Federal do Triângulo Mineiro, Av. Doutor Randolfo Borges Júnior, 1250, Univerdecidade, 38064-200, Uberaba, MG, Brazil.
authors.forename: Thaíla
authors.initials: T
authors.lastname: de Mello Florêncio
authors.affiliation: Programa de Mestrado Profissional em Inovação Tecnológica, Universidade Federal do Triângulo Mineiro, Av. Doutor Randolfo Borges Júnior, 1250, Univerdecidade, 38064-200, Uberaba, MG, Brazil.
authors.forename: Karla Santos
authors.initials: KS
authors.lastname: de Araújo
authors.affiliation: Programa de Pós-Graduação Multicêntrico em Química de Minas Gerais, Universidade Federal do Triângulo Mineiro, Av. Doutor Randolfo Borges Júnior, 1400, Univerdecidade, 38064-200, Uberaba, MG, Brazil.
authors.forename: Raissa
authors.initials: R
authors.lastname: Antonelli
authors.affiliation: Programa de Mestrado Profissional em Inovação Tecnológica, Universidade Federal do Triângulo Mineiro, Av. Doutor Randolfo Borges Júnior, 1250, Univerdecidade, 38064-200, Uberaba, MG, Brazil.
authors.forename: Ana Luiza
authors.initials: AL
authors.lastname: de Toledo Fornazari
authors.affiliation: Departamento de Engenharia Química, Universidade Federal do Triângulo Mineiro, Av. Doutor Randolfo Borges Júnior, 1250, Univerdecidade, 38064-200, Uberaba, MG, Brazil.
authors.forename: Paula Cordeiro Rodrigues
authors.initials: PC
authors.lastname: da Cunha
authors.affiliation: Departamento de Engenharia Química, Universidade Federal do Triângulo Mineiro, Av. Doutor Randolfo Borges Júnior, 1250, Univerdecidade, 38064-200, Uberaba, MG, Brazil.
authors.forename: Letícia Helena
authors.initials: LH
authors.lastname: da Silva Bontempo
authors.affiliation: São Carlos Institute of Chemistry, University of São Paulo, P.O. Box780, Sao Carlos, SP, 13560-970, Brazil.
authors.forename: Artur
authors.initials: A
authors.lastname: de Jesus Motheo
authors.affiliation: Programa de Mestrado Profissional em Inovação Tecnológica, Universidade Federal do Triângulo Mineiro, Av. Doutor Randolfo Borges Júnior, 1250, Univerdecidade, 38064-200, Uberaba, MG, Brazil.|Departamento de Engenharia Química, Universidade Federal do Triângulo Mineiro, Av. Doutor Randolfo Borges Júnior, 1250, Univerdecidade, 38064-200, Uberaba, MG, Brazil.
authors.forename: Ana Claudia
authors.initials: AC
authors.lastname: Granato
authors.affiliation: Programa de Mestrado Profissional em Inovação Tecnológica, Universidade Federal do Triângulo Mineiro, Av. Doutor Randolfo Borges Júnior, 1250, Univerdecidade, 38064-200, Uberaba, MG, Brazil. geoffroy@icte.uftm.edu.br.|Programa de Pós-Graduação Multicêntrico em Química de Minas Gerais, Universidade Federal do Triângulo Mineiro, Av. Doutor Randolfo Borges Júnior, 1400, Univerdecidade, 38064-200, Uberaba, MG, Brazil. geoffroy@icte.uftm.edu.br.|Departamento de Engenharia Química, Universidade Federal do Triângulo Mineiro, Av. Doutor Randolfo Borges Júnior, 1250, Univerdecidade, 38064-200, Uberaba, MG, Brazil. geoffroy@icte.uftm.edu.br.
authors.forename: Geoffroy Roger Pointer
authors.initials: GR
authors.lastname: Malpass
mesh_terms: D002713:Chlorine / Q000737:chemistry*; D004572:Electrolysis / Q000379:methods*; D007220:Industrial Waste; D010084:Oxidation-Reduction; D010782:Photolysis; D013783:Textile Industry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D002713:Chlorine
keywords: Chlorine photolysis; Photo-assisted electrochemical degradation; Reactive chlorine species; Textile effluent