Electrochemical behavior of azo dyes, Fast Sulphon Black F (FSB-F) and Eriochrome Black T (EBT) was performed with cyclic voltammetry in sulphuric acid medium using glassy carbon as working electrode. The redox potentials observed at -230mV and -300mV for FSB-F and EBT respectively. Electrochemical degradation of dyes assessed by means of the application of DC current. However, complete degradation was achieved for both FSB-F and EBT. The decolourisation efficiency was assessed through UV-Vis studies. The Liquid Chromatograms of the dyes were analyzed before and after electrochemical treatment and confirmed that the azo groups and aromatic rings were destroyed. The effect of pH and nature of supporting electrolytes on the electrochemical degradation of the dyes were also studied. The maximum Chemical Oxygen Demand (COD) removal was 100% for the dye solutions at 15gL-1 of NaCl concentration. The results revealed that the suitability of the present process will effectively degrade the dye effluents.
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