Abstract

LEON, M. T.; POMPOSO, G. G.; SUAREZ, G. J.  and  VEGA, S. S.. Treatment of Acid Orange 24 Solutions with Dimensionally Stable Anodes. Port. Electrochim. Acta [online]. 2009, vol.27, n.3, pp.227-236. ISSN 0872-1904.

Removal of acid orange 24 color was studied in an electrochemical cell composed of a dimensional stable anode (DSA), a stainless steel cathode and an electrolyte media containing sodium sulfate, sodium chloride, and two commercial surfactants named Uniperol y Leophen, corresponding to wetting and dispersant agents, both of them required to favor the color incorporation inside the fiber. DSA used in this study comprises a titanium mesh covered by a layer of iridium, and a stainless steel plate covered by a layer of iridium-tin mixture. Experimental approach allowed getting an inside of the rol played by sulfate, chloride and surfactants for both color and chemical oxygen demand (COD) removal. Obtained results have shown that the Ir-Sn electrode provides the highest color removal under chloride mediated oxidant conditions. Evaluation of the DSA performance in solutions containing surfactants has shown that obtained color removal is similar for both electrodes; otherwise the COD removal attained with the Ir DSA is about six times the one obtained with the Ir-Sn electrode.

Keywords : azo color; DSA; textile wastewater; electrochemical treatment.

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