Decolorizing Methyl Orange by Fe-Electrocoagulation Process – A Mechanistic Insight
International Journal of Environmental Chemistry
Volume 2, Issue 1, June 2018, Pages: 18-28
Received: Aug. 9, 2018; Accepted: Aug. 20, 2018; Published: Sep. 13, 2018
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Authors
Sara Irki, Chemical Engineering Department, Faculty of Engineering, University of Blida, Blida, Algeria
Djamel Ghernaout, Chemical Engineering Department, Faculty of Engineering, University of Blida, Blida, Algeria; Chemical Engineering Department, College of Engineering, University of Ha’il, Ha’il, Saudi Arabia
Mohamed Wahib Naceur, Chemical Engineering Department, Faculty of Engineering, University of Blida, Blida, Algeria
Abdulaziz Alghamdi, Mecanical Engineering Department, College of Engineering, University of Ha’il, Ha’il, Saudi Arabia
Mohamed Aichouni, Industrial Engineering Department, College of Engineering, University of Ha’il, Ha’il, Saudi Arabia
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Abstract
The aim of this work is to study the removal of methyl orange (MO) using electrocoagulation (EC) process. An electrochemical cell consisting of two iron electrodes, with 22.5 cm2 as an active surface, is used. Operating conditions are optimized such as nature and concentration of the supporting electrolyte, current density, pH, inter-electrode distance, MO concentration, and the connection mode. The decolorization degree obtained after 15 min of EC reached 83% at pH 7.25 with a current density of 64 A/m2. Depending on pH, three EC process mechanisms are suggested and less or more significant removal performances are obtained in these tests. The Scanning Electron Microscopy (SEM) observations show that the flocs formed by the EC process have two distinct morphologies: a lumpy structure and an amorphous structure, formed by particles of various sizes. The Energy Disperses X-ray (EDX) analysis of the surface of the flocs formed by the EC process shows a spectrum with levels of major elements of iron, oxygen and chloride, as well as carbon, sodium and aluminum are detected as minor elements. As proved in terms of MO elimination through this research and due to its several advantageous, EC process would find its convenient place in wastewater treatment technology.
Keywords
Electrocoagulation (EC), Methyl Orange (MO), Iron, Decolorization, Scanning Electron Microscopy (SEM), Energy Disperses X-ray (EDX) Analysis, Supporting Electrolyte (SE)
To cite this article
Sara Irki, Djamel Ghernaout, Mohamed Wahib Naceur, Abdulaziz Alghamdi, Mohamed Aichouni, Decolorizing Methyl Orange by Fe-Electrocoagulation Process – A Mechanistic Insight, International Journal of Environmental Chemistry. Vol. 2, No. 1, 2018, pp. 18-28. doi: 10.11648/j.ijec.20180201.14
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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