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Article Dans Une Revue Separation Science and Technology Année : 2022

Electrochemical oxidation treatment of Direct Red 23 aqueous solutions: Influence of the operating conditions

Fatima Ezzahra Titchou
Hicham Zazou
  • Fonction : Auteur
Hanane Afanga
  • Fonction : Auteur
Jamila El Gaayda
  • Fonction : Auteur
Rachid Ait Akbour
  • Fonction : Auteur
M. Rivallin
Marc Cretin
  • Fonction : Auteur
  • PersonId : 753971
  • IdHAL : marc-cretin
Mohamed Hamdani

Résumé

A 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), Magnéli 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 cm−2, and DR23 concentration of 60 mg L−1 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 g−1 TOC in NaCl and Na2SO4 electrolytes, respectively.

Domaines

Catalyse
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Dates et versions

hal-03647331 , version 1 (11-10-2023)

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Fatima Ezzahra Titchou, Hicham Zazou, Hanane Afanga, Jamila El Gaayda, Rachid Ait Akbour, et al.. Electrochemical oxidation treatment of Direct Red 23 aqueous solutions: Influence of the operating conditions. Separation Science and Technology, 2022, 57 (9), pp.1501-1520. ⟨10.1080/01496395.2021.1982978⟩. ⟨hal-03647331⟩
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