Journal of Industrial and Engineering Chemistry, Vol.26, 116-121, June, 2015
Treatment of diazo dye Reactive Green 19 by anodic oxidation on a boron-doped diamond electrode
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The anodic oxidation of diazo dye Reactive Green 19 on a boron-doped diamond electrode was investigated. A membrane-free reactor was used to evaluate the effect of chloride concentration (0-0.5 M), current density (100-500 A m-2), pH (3-11) and stirring rate (250-750 rpm) on color and TOC removal. Complete decolorization was obtained in less than 30 min, whereas total mineralization was never achieved within 3 h of electrolysis. Color removal was significantly enhanced by increasing chloride concentration and, to a lesser extent, current density and stirring rate. TOC removal was positively affected by current density, pH and chloride concentration.
Keywords:Reactive Green 19;Azo dye;Boron-doped diamond electrode;Color removal;TOC removal;Active chlorine
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