Electrochemical oxidation treatment of Direct Red 23 aqueous solutions - Influence of the operating conditions
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2021-09-26 |
| Journal | Separation Science and Technology |
| Authors | Fatima Ezzahra Titchou, Hicham Zazou, Hanane Afanga, Jamila El Gaayda, Rachid AıÌt Akbour |
| Institutions | Université Ibn Zohr, Institut Européen des Membranes |
| Citations | 21 |
Abstract
Section titled âAbstractâA comparative study of the degradation of Direct Red 23 (DR23) dye aqueous solutions by electrooxidation was investigated using different anodes: carbon graphite (CG), dimensionally stable anode (DSA), MagnĂ©li phase Ti4O7, and boron-doped diamond (BDD). Stainless steel (SS) and CG plates were tested as cathodes. The effect of operating parameters on the degradation kinetics of the dye was studied. In this study, NaCl and Na2SO4 were selected as supporting electrolytes; the former was found to be more suitable for the degradation of DR23. The degradation of the dye follows a pseudo-first-order kinetics in both media. Higher total organic carbon (TOC) efficiency was achieved by BDD/CG cells. Thus, the treatment efficiency obtained using a current density of 5 mA cmâ2, and DR23 concentration of 60 mg Lâ1 was about 86% using both NaCl and Na2SO4 electrolyte, at 6 h electrolysis time. The energy consumptions per g TOC removed were found to be 2.05 and 2.6 kWh gâ1 TOC in NaCl and Na2SO4 electrolytes, respectively.