Desenvolvimento e avaliação de eletrodos de difusão gasosa (EDG) para geração de H2O2 in situ e sua aplicação na degradação do corante reativo azul 19

This work reports the development of GDE for electrogeneration of H2O2 and their application in the degradation process of Reactive Blue 19 dye. GDE produced by carbon black with 20% polytetrafluoroethylene generated up to 500 mg L-1 of H2O2 through the electrolysis of acidic medium at -0.8 V vs Ag/...

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Published inQuímica Nova Vol. 35; no. 10; pp. 1961 - 1966
Main Authors Robson S. Rocha, Rafael M. Reis, André A. G. F. Beati, Marcos R. V. Lanza, Maria Del Pilar T. Sotomayor, Rodnei Bertazzoli
Format Journal Article
LanguageEnglish
Published Sociedade Brasileira de Química 01.01.2012
Subjects
gas diffusion electrode
hydrogen peroxide
Reactive Blue 19 dye
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Summary:This work reports the development of GDE for electrogeneration of H2O2 and their application in the degradation process of Reactive Blue 19 dye. GDE produced by carbon black with 20% polytetrafluoroethylene generated up to 500 mg L-1 of H2O2 through the electrolysis of acidic medium at -0.8 V vs Ag/AgCl. Reactive Blue 19 dye was degraded most efficiently with H2O2 electrogenerated in the presence of Fe(II) ions, leading to removal of 95% of the original color and 39% of TOC at -0.8 V vs Ag/AgCl.
ISSN:1678-7064
DOI:10.1590/S0100-40422012001000014