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

Author(s)

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

Affiliation

^[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

• Document type: Journal article
• Source: Chemosphere; v. 207, p. 774-780, SEP 2018.
• Web of Science Citations: 3

Abstract

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)

• FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
• Grantee: Maria Valnice Boldrin
• Support Opportunities: Research Projects - Thematic Grants