Author/Authors :
Wakrim, A Department of Chemistry - Laboratory Interface Materials Environment - Faculty of Sciences Aïn Chock - B.P 5366 Maarif Casablanca, Morocco , Zaroual, Z Department of Chemistry - Laboratory Interface Materials Environment - Faculty of Sciences Aïn Chock - B.P 5366 Maarif Casablanca, Morocco , El Ghachtouli, S Department of Chemistry - Laboratory Interface Materials Environment - Faculty of Sciences Aïn Chock - B.P 5366 Maarif Casablanca, Morocco , Jamal Eddine, J Department of Chemistry - Laboratory of Synthesis - Extraction and Physico-chemical Study of Organic Molecules - Faculty of Sciences Aïn Chock - B.P 5366 Maarif Casablanca, Morocco , Azzi, M Department of Chemistry - Laboratory Interface Materials Environment - Faculty of Sciences Aïn Chock - B.P 5366 Maarif Casablanca, Morocco
Abstract :
The Electro-Fenton technique was used to investigate the discoloration of carmoisine red azo dye solution. Carbon graphite (cathode) and platinum (anode) electrodes were used to achieve optimal discoloration efficiency. We examined the effect of Fe2+ concentration and
current density. The results showed that with 200 mA cm-2 of electrolysis current and 0.2 mM of Fe2+ at pH = 3; 93% discoloration efficiency was achieved in 60 min. IR, LC-MS-MS, and Ion Chromatography studies were used to evaluate the degradation process of carmoisine red. Intermediates of aromatic compounds have been identified. A possible carmoisine red degradation pathway was proposed and discussed.
Keywords :
Electrode material , Azo dye , Electro-Fenton process , Discoloration , Degradation
