Improving the catalytic effect of peroxodisulfate and peroxodiphosphate electrochemically generated at diamond electrode by activation with light irradiation

Autor(es)

de Araujo, Danyelle Medeiros ^[1] ; Saez, Cristina ^[2] ; Canizares, Pablo ^[2] ; Rodrigo, Manuel Andres ^[2] ; Martinez-Huitle, Carlos A. ^{[3, 4]}

Afiliação do(s) autor(es)

^[1] Fed Inst Educ Sci & Technol Rio Grande do Norte, BR-595080 Ipanguacu, RN - Brazil

^[2] Univ Castilla La Mancha, Dept Chem Engn, Campus Univ S-N, E-13071 Ciudad Real - Spain

^[3] Unesp, Natl Inst Alternat Technol Detect Toxicol Evaluat, Inst Chem, POB 355, BR-14800900 Araraquara, SP - Brazil

^[4] Univ Fed Rio Grande do Norte, Inst Chem, BR-59078970 Natal, RN - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Chemosphere; v. 207, p. 774-780, SEP 2018.
• Citações Web of Science: 3

Resumo

Boron doped diamond (BDD) anode has been used to oxidatively remove Rhodamine B (RhB), as persistent organic pollutant, from synthetic wastewater by electrolysis, photoelectrolysis and chemical oxidation containing sulfate and phosphate as supporting electrolytes. RhB is effectively oxidized by electrolysis and by chemical oxidation with the oxidants separately produced by electrolyzing sulfate of phosphate solutions (peroxodisulfate and peroxodiphosphate, respectively). The results showed that light irradiation improved the electrolysis of RhB due to the activation of oxidants under irradiation at high current densities. Meanwhile, the efficiency of the chemical oxidation approach by ex situ electrochemical production of oxidants was not efficient to degrade RhB. (C) 2018 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Temático