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Comparative study of the removal of direct red 23 by anodic oxidation, electro-Fenton, photo-anodic oxidation and photoelectro-Fenton in chloride and sulfate media.
Titchou, Fatima Ezzahra; Zazou, Hicham; Afanga, Hanane; Jamila, El Gaayda; Ait Akbour, Rachid; Hamdani, Mohamed; Oturan, Mehmet A.
Afiliação
  • Titchou FE; Ibn Zohr University, Faculty of Sciences, Chemical Department, BO 8106, Dakhla district, Agadir, Morocco.
  • Zazou H; Ibn Zohr University, Faculty of Sciences, Chemical Department, BO 8106, Dakhla district, Agadir, Morocco.
  • Afanga H; Ibn Zohr University, Faculty of Sciences, Chemical Department, BO 8106, Dakhla district, Agadir, Morocco.
  • Jamila EG; Ibn Zohr University, Faculty of Sciences, Chemical Department, BO 8106, Dakhla district, Agadir, Morocco.
  • Ait Akbour R; Ibn Zohr University, Faculty of Sciences, Chemical Department, BO 8106, Dakhla district, Agadir, Morocco.
  • Hamdani M; Ibn Zohr University, Faculty of Sciences, Chemical Department, BO 8106, Dakhla district, Agadir, Morocco. Electronic address: hamdani.mohamed@gmail.com.
  • Oturan MA; Université Gustave Eiffel, Laboratoire Géomatériaux et Environnement (LGE), EA 4508, 77454, Marne-la-Vallée, France. Electronic address: mehmet.oturan@univ-eiffel.fr.
Environ Res ; 204(Pt D): 112353, 2022 03.
Article em En | MEDLINE | ID: mdl-34774509
This study aims to compare the efficiency of anodic oxidation with electrogenerated H2O2 (AO-H2O2), electro-Fenton (EF), and their association with UV irradiation (photo anodic oxidation (PAO), and photo electro-Fenton (PEF) for the removal of Direct Red 23 from wastewater using a BDD/carbon felt cell in chloride and sulfate medium and in their combination. The effect of the supporting electrolyte was investigated in AO-H2O2 and EF processes. High discoloration efficiency was obtained in chloride media while a higher mineralization rate was achieved in sulfate media. The EF process reached higher total organic carbon (TOC) removal efficiency than AO-H2O2. 90% TOC removal rate was achieved by the EF against 82% by AO-H2O2 in sulfate media. The influence of using the mixt supporting electrolyte formed of 75% Na2SO4 + 25% NaCl was found to have beneficial effect on TOC removal, achieving 89% and 97% by AO-H2O2 and EF, respectively. High currents led to higher mineralization rates while low currents yielded to a higher mineralization current efficiency (MCE%) and lower energy consumption (EC). UV irradiation enhanced process efficiency. Mineralization efficiency followed the sequence: AO-H2O2 < PAO < EF < PEF. The PEF process was able to remove TOC completely at 5 mA cm-2 current density and 6 h of electrolysis with a MCE% value of 16.57% and EC value of 1.29 kWh g-1 TOC removed.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Sulfatos / Poluentes Químicos da Água Idioma: En Revista: Environ Res Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Marrocos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Sulfatos / Poluentes Químicos da Água Idioma: En Revista: Environ Res Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Marrocos