Electrochemical Advanced Oxidation of Acid Red Solution Using Carbon Felt or Glassy Carbon Cathode and Pt Anode

Document Type : Original Research Paper

Authors

1 Laboratory Interface Materials Environment, Department of Chemistry, Faculty of Sciences Aïn Chock, Hassan II University, B.P 5366 Maarif, Casablanca, Morocco

2 Laboratory of Synthesis, Extraction and Physico-chemical Study of Organic Molecules, Department of Chemistry, Faculty of Sciences Aïn Chock, Hassan II University, B.P 5366 Maarif, Casablanca, Morocco

10.22059/poll.2022.342370.1459

Abstract

In order to find an effective decolorization method for dye wastewaters, the present work aims at studying the treatment efficiency of an azo dye Acid Red 14 (AR14) by Electro-Fenton process using an undivided electrochemical cell containing different electrode materials. The optimal removal efficiency was obtained using carbon felt or glassy carbon (cathode) and platinum (anode) electrodes. The method is based on the reaction of electrochemically produced hydroxyl radicals leading to oxidative degradation of the AR14. To find the best conditions for treatment of AR14 dye, the effects of Fe2+ concentration, current density, the effect of pH initial, and the nature of support electrolyte were studied. The results showed 94 % removal efficiency in 30 minutes with 120 mA/cm2 of electrolysis current, 0.2 mM of Fe2+, and pH = 3. However, the decolorization efficiency measurements confirmed that the Electro-Fenton process with the platinum anode and the carbon felt cathode was more efficient.

Keywords


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