Estudio de la remoción electroquímica de anilina Azul BR en aguas residuales industriales mediante la generación in situ de ion Ferrato

Abstract

The water contamination with dyes product of textile activities, by industrial effluents discharge without previous treatment, results in an emerging problem that has not received attention. It has been demonstrated that advanced oxidation processes (AOPs), such as electro-oxidation, allowed an effective removal of stable organic contaminants in the environment. This work proposes an electrochemical treatment of water contaminated with Blue Aniline BR (50 mg L-1) by the in-situ generation of Ferrate ion [Fe(VI)], using as working anode BDD, which focuses on the synergistic effect produced between •OH and [Fe(VI)]. Two electrolytic solutions were used for the study, 0.1 M HClO4 and 0.05 M Na2SO4 adjusted to pH 3 with H2SO4. The [Fe(VI)] generation was showed by Cyclic Voltammetry (CV) and the current effect (3,5 mA cm-2, 7 mA cm-2, 15 mA cm-2 y 30 mA cm-2) was analyzed during the removal experiments. Too, its effectiveness was checked analytically by UV-Vis spectrophotometry and the cell potential was followed to establish the energy consumption and operations costs.