ELECTRODEGRADATION OF PONCEAU 2R USING DIMENSIONALLY-STABLE ANODES AND Ti/Pt

ELECTRODEGRADATION OF PONCEAU 2R USING DIMENSIONALLY-STABLE ANODES AND Ti/Pt. This paper reports the electrochemical degradation of the azo dye Ponceau 2R under galvanostatic electrolysis in the 1 to 200 mA cm(-2) range at room temperature using dimensionally-stable anodes of oxygen (DSA-O-2), chlorine (DSA-Cl-2) and a titanium electrode of platinum coated with platinum oxide (Ti/Pt). The methodology applied was efficient for removing the color of the Ponceau 2R and the highest percentage removal of total organic carbon was obtained at 200 mA cm(-2). Despite not having been observed complete mineralization, approximately80% removal of aromatic rings was estimated, resulting in drastic reduction of toxicity of the sample.