THE STUDY ON SOME PARAMETERS AFFECTING THE DEGRADATION OF METHYLENE BLUE IN WATER BY ELECTRO-FENTON USING TI/PBO2 ANODE

In this work, the combination of two advanced oxidation processes, electro-Fenton (hydroxyl radical ●OH generated by reactions on cathode) and anodic (●OH produced directly anode), in same reactor was studied to evaluate treatment methylene blue (MB) dye aqueous solutions. This electrochemical system equipped with a commercial carbon felt cathode (9.5cm 12cm), lead dioxide-coated titanium anode (10 direct current (DC) continuously aerated. The effects operating parameters such as pH, applied (I), catalyst concentration ([Fe2+]) MB (C0) removal efficiency were investigated through monitoring at different times spectrophotometric method. An optimal process achieved condition [Fe2+] = 0.1 mM; pH 3.0; [Na2SO4] 0.05 M; i 2.5 mA.cm-2 after 60 minutes electrolysis, 92.19% removed which far higher than figure obtained using individually (73.77%) or (58.04%). These experimental results have demonstrated that Ti/PbO2 electrode is prospective method for destruction persistent dyes.