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Removal of Methylene Blue in aqueous solutions by Electrocoagulation process: Adsorption, Kinetics, studies
Alain Stéphane Assémian (1,*)
, Konan Edmond Kouassi (2) , Kopoin Adouby (3) , Patrick Drogui (4) , David Boa (5) (1) Laboratoire des Procédés Industriels, de Synthèse de l’Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Houphouët-Boigny, Yamoussoukro, 1313, Côte d’Ivoire
(2) Laboratoire des Procédés Industriels, de Synthèse de l’Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Houphouët-Boigny, Yamoussoukro, 1313, Côte d’Ivoire
(3) Laboratoire des Procédés Industriels, de Synthèse de l’Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Houphouët-Boigny, Yamoussoukro, 1313, Côte d’Ivoire
(4) Institut National de la Recherche Scientifique (INRS Eau Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec City, G1K9A9, Canada
(5) Laboratoire de Thermodynamique et de Physico-Chimie du Milieu (LTPCM), UFR-SFA, Université Nangui-Abrogoua, Abidjan, 801, Côte d’Ivoire
(*) Corresponding Author
Received: 19 May 2018 | Revised: 01 Aug 2018 | Accepted: 03 Aug 2018 | Published: 31 Dec 2018 | Issue Date: December 2018
Abstract
The purpose of this study is to understand the mechanism driving the removal of methylene blue through electrocoagulation process. Experiments were carried out using iron as anode and cathode in a batch electrochemical cell operated in a monopolar configuration. The effects of operating parameters (initial pH, current density, initial dye concentration and energy consumption) on the removal of methylene blue from solution were investigated. The results showed that the optimum removal efficiency of 93.2% was achieved for a current density of 9.66 mA/cm2, optimal pH of 8±0.01 with a specific energy consumption of 7.451 kWh/m3. Afterwards, first and second-order rate equations were successively applied to study adsorption kinetics models. On top of usual correlation coefficients (r2), statistical test Chi-square (χ2) were applied to evaluate goodness of fit and consequently find out the best kinetic model. Results showed that MB adsorption process onto iron hydroxides formed in aqueous solution during electrocoagulation treatment followed a second-order kinetic.
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DOI: 10.5155/eurjchem.9.4.311-316.1736
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Institut National Polytechnique Houphouët-Boigny, Yamoussoukro, Côte d’Ivoire
Citations
[1]. Melek Canbulat Özdemir
Removal of methylene blue by new tunable aryl/alkyl ionic liquids/salts (TAAILs) from aqueous solution
Separation Science and Technology , 1, 2019
DOI: 10.1080/01496395.2019.1677714
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DOI Link: https://doi.org/10.5155/eurjchem.9.4.311-316.1736
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European Journal of Chemistry 2018, 9(4), 311-316 | doi: https://doi.org/10.5155/eurjchem.9.4.311-316.1736 | Get rights and content
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