Resumo

EL JAMAL, M. M. et al. Effect of Operating Parameters on Electrochemical Degradation of Alizarin Red S on Pt and BDD Electrodes. Port. Electrochim. Acta [online]. 2014, vol.32, n.3, pp.233-242. ISSN 0872-1904.  https://doi.org/10.4152/pea.201403233.

The degradation of Alizarin Red S by electro-generated species using Pt and BDD electrodes was performed. The results were explained by the generation of OH^•; radical, S₂O₈^2- at BDD electrode and active chlorine species at Pt electrode. The slow degradation is affected by the current density, initial pH, temperature, initial dye concentration and the nature of the supporting electrolyte. However, the ionic strength showed a negligible effect on both electrodes. In the presence of KCl, the intermediates produced during the degradation are similar at both electrodes. In the presence of sulfate (at BDD electrode), the rate and the mechanism of the degradation are different from those in the presence of KCl. TOC analysis showed total mineralization of AR S.

Palavras-chave : BDD electrode; Pt electrode; Alizarin Red S; Electrodegradation.

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