Writers: Francisco W. P. Ribeiro, Sâmeque do N. Oliveira, Pedro de Lima-Neto e Adriana N. Correia, Lúcia H. Mascaro, Roberto de Matos, Ernesto C. P. de Souza, Marcos R. de V. Lanza
Keywords: Ponceau 2R; DSA; Ti/Pt.
Abstract: 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-O2), chlorine (DSA-Cl2) 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.
