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Hien SA, Trellu C, Oturan N, Assémian AS, Briton BGH, Drogui P, Adouby K, Oturan MA. Comparison of homogeneous and heterogeneous electrochemical advanced oxidation processes for treatment of textile industry wastewater. J Hazard Mater 2022; 437:129326. [PMID: 35714542 DOI: 10.1016/j.jhazmat.2022.129326] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 06/04/2022] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
This study aimed at understanding the influence of the generation of oxidants in a heterogeneous way at boron-doped diamond (BDD) anode (anodic oxidation (AO)) or homogeneously in the bulk (electro-Fenton (EF)) during treatment of a textile industry wastewater. Both processes achieved high TOC removal. A yield of 95 % was obtained by combining EF with BDD anode during 6 h of treatment. The EF process was found to be faster and more efficient for discoloration of the effluent, whereas AO was more effective to limit the formation of degradation by-products in the bulk. An advantage of AO was to treat this alkaline effluent without any pH adjustment. Operating these processes under current limitation allowed optimizing energy consumption in both cases. However, using BDD anode led to the formation of very high concentration of ClO3-/ClO4- from Cl- oxidation (even at low current density), which appears as a key challenge for treatment of such effluent by AO. By comparison, EF with Pt anode strongly reduced the formation of ClO3-/ClO4-. Operating EF at low current density even maintained these concentrations below 0.5 % of the initial Cl- concentration. A trade-off should be considered between TOC removal and formation of toxic chlorinated by-products.
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Affiliation(s)
- Sié Alain Hien
- Université Gustave Eiffel, Laboratoire Géomatériaux et Environnement EA 4508, 77454 Marne-la-Vallée, Cedex 2, France; Laboratoire des Procédés Industriels, de Synthèse de l'Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Houphouët-Boigny, BP 1313 Yamoussoukro, Côte d'Ivoire
| | - Clément Trellu
- Université Gustave Eiffel, Laboratoire Géomatériaux et Environnement EA 4508, 77454 Marne-la-Vallée, Cedex 2, France.
| | - Nihal Oturan
- Université Gustave Eiffel, Laboratoire Géomatériaux et Environnement EA 4508, 77454 Marne-la-Vallée, Cedex 2, France
| | - Alain Stéphane Assémian
- Laboratoire de Thermodynamique et Chimie Physique de l'Environnement, Université de Nangui-Abrogoua, 02 BP 801, Abidjan 01, Côte d'Ivoire
| | - Bi Gouessé Henri Briton
- Laboratoire des Procédés Industriels, de Synthèse de l'Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Houphouët-Boigny, BP 1313 Yamoussoukro, Côte d'Ivoire
| | - Patrick Drogui
- INRS Eau, Terre et Environnement, 490, rue de la Couronne, Québec G1K9A9, Canada
| | - Kopoin Adouby
- Laboratoire des Procédés Industriels, de Synthèse de l'Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Houphouët-Boigny, BP 1313 Yamoussoukro, Côte d'Ivoire
| | - Mehmet A Oturan
- Université Gustave Eiffel, Laboratoire Géomatériaux et Environnement EA 4508, 77454 Marne-la-Vallée, Cedex 2, France.
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Briton BGH, Adou KE, Assémian AS, Reinert L, Duclaux L, Adouby K, Yao BK, Koffi YGL. Efficiency of the heterogeneous catalyst from electrocoagulation sludge for the removal of methylene blue in the presence of persulfate. J Environ Sci Health A Tox Hazard Subst Environ Eng 2022; 57:92-101. [PMID: 35129082 DOI: 10.1080/10934529.2022.2035582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/08/2022] [Accepted: 01/23/2022] [Indexed: 06/14/2023]
Abstract
Persulfate activation by heterogeneous catalysts based on transition metals is of interest in textile effluent treatment processes. Thus, iron-rich electrocoagulation sludge has been thermally treated to obtain new catalysts. The characterization of this catalyst by X-ray diffraction revealed the presence of FeAl2O4 nanoparticles active in the decomposition of persulfate into sulfate radicals (SO4•-). The efficiency of catalyst/persulfate was monitored during the methylene blue (MB) solution discoloration. The effects of temperature, pH, initial MB concentration, catalyst dose and persulfate dose were also studied. MB removal catalytic activity showed around 94% discoloration and 45.7% TOC reduction after 180 minutes batch reaction at pH = 4.0 (catalyst dose: 0.5 g/L, persulfate dose: 1 g/L; initial MB concentration: 20 mg/L). This catalyst reuse further confirmed its catalytic potential as a discoloration rate of about 82.45% was obtained after five cycles. The biodegradability monitoring measured by the carbon oxidation state (COS) has revealed a remarkable and continuous degradation of organic compounds. The EPR tests revealed that this catalytic reaction generates the radical species responsible for the degradation of MB. Finally, these results show that this catalyst from the thermal activation of electrocoagulation sludge is capable of decomposing persulfate to degrade bioresistant compounds such as textile dyes.
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Affiliation(s)
- Bi Gouessé Henri Briton
- Laboratoire de Procédés Industriels de Synthèse, de l'Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Félix Houphouët Boigny, Yamoussoukro, Côte d'Ivoire
| | - Kouakou Eric Adou
- Laboratoire de Procédés Industriels de Synthèse, de l'Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Félix Houphouët Boigny, Yamoussoukro, Côte d'Ivoire
| | - Alain Stéphane Assémian
- Laboratoire de Procédés Industriels de Synthèse, de l'Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Félix Houphouët Boigny, Yamoussoukro, Côte d'Ivoire
| | - Laurence Reinert
- Environnements Dynamiques Territoires Montagnes (EDYTEM), Université Savoie Mont Blanc, Chambéry, France
| | - Laurent Duclaux
- Environnements Dynamiques Territoires Montagnes (EDYTEM), Université Savoie Mont Blanc, Chambéry, France
| | - Kopoin Adouby
- Laboratoire de Procédés Industriels de Synthèse, de l'Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Félix Houphouët Boigny, Yamoussoukro, Côte d'Ivoire
| | - Benjamin Kouassi Yao
- Laboratoire de Procédés Industriels de Synthèse, de l'Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Félix Houphouët Boigny, Yamoussoukro, Côte d'Ivoire
| | - Yao Guy Landry Koffi
- Laboratoire de Procédés Industriels de Synthèse, de l'Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Félix Houphouët Boigny, Yamoussoukro, Côte d'Ivoire
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