European Journal of Chemistry

Removal of Methylene Blue in aqueous solutions by Electrocoagulation process: Adsorption, Kinetics, studies

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Published: Dec 31, 2018
DOI: https://doi.org/10.5155/eurjchem.9.4.311-316.1736
Keywords:
Kinetic, Removal, Adsorption, Methylene blue, Electrocoagulation, Monopolar configuration
Section
Research Article
Issue
Vol. 9 No. 4 (2018): December 2018
Dates
Received 2018-05-19
Accepted 2018-08-03
Published 2018-12-31
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Alain Stéphane Assémian
Laboratoire des Procédés Industriels, de Synthèse de l’Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Houphouët-Boigny, Yamoussoukro, 1313, Côte d’Ivoire
http://orcid.org/0000-0001-7755-9775
Konan Edmond Kouassi
Laboratoire des Procédés Industriels, de Synthèse de l’Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Houphouët-Boigny, Yamoussoukro, 1313, Côte d’Ivoire
http://orcid.org/0000-0002-1243-5330
Kopoin Adouby
Laboratoire des Procédés Industriels, de Synthèse de l’Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Houphouët-Boigny, Yamoussoukro, 1313, Côte d’Ivoire
http://orcid.org/0000-0002-8015-2893
Patrick Drogui
Institut National de la Recherche Scientifique (INRS Eau Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec City, G1K9A9, Canada
http://orcid.org/0000-0002-3802-2729
David Boa
Laboratoire de Thermodynamique et de Physico-Chimie du Milieu (LTPCM), UFR-SFA, Université Nangui-Abrogoua, Abidjan, 801, Côte d’Ivoire
http://orcid.org/0000-0002-9804-5965

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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Assémian, A. S.; Kouassi, K. E.; Adouby, K.; Drogui, P.; Boa, D. Removal of Methylene Blue in Aqueous Solutions by Electrocoagulation Process: Adsorption, Kinetics, Studies. Eur. J. Chem. 2018, 9, 311-316.

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Institut National Polytechnique Houphouët-Boigny, Yamoussoukro, Côte d’Ivoire
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