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Desalination and Water Treatment Volume 57, 2016 - Issue 8
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Articles

Adsorption of cyanide ions in aqueous solution using raw and oxidized coke

Z’hour HattabLaboratory of Water Treatment and Valorization of the Industrial Waste, Faculty of Sciences, Department of Chemistry, Badji-Mokhtar University, B.P.12, Annaba23000, Algeria, Tel. +213 797598522, Tel. +213 792764612, Tel. +213 698675131, Tel. +213 666132069, Tel. +213 771250811Correspondence[email protected]
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Naima FilaliLaboratory of Water Treatment and Valorization of the Industrial Waste, Faculty of Sciences, Department of Chemistry, Badji-Mokhtar University, B.P.12, Annaba23000, Algeria, Tel. +213 797598522, Tel. +213 792764612, Tel. +213 698675131, Tel. +213 666132069, Tel. +213 771250811Correspondence[email protected]
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Radia MazouzLaboratory of Water Treatment and Valorization of the Industrial Waste, Faculty of Sciences, Department of Chemistry, Badji-Mokhtar University, B.P.12, Annaba23000, Algeria, Tel. +213 797598522, Tel. +213 792764612, Tel. +213 698675131, Tel. +213 666132069, Tel. +213 771250811Correspondence[email protected]
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Kamel GuerfiLaboratory of Water Treatment and Valorization of the Industrial Waste, Faculty of Sciences, Department of Chemistry, Badji-Mokhtar University, B.P.12, Annaba23000, Algeria, Tel. +213 797598522, Tel. +213 792764612, Tel. +213 698675131, Tel. +213 666132069, Tel. +213 771250811Correspondence[email protected]
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Nacer RebbaniLaboratory of Water Treatment and Valorization of the Industrial Waste, Faculty of Sciences, Department of Chemistry, Badji-Mokhtar University, B.P.12, Annaba23000, Algeria, Tel. +213 797598522, Tel. +213 792764612, Tel. +213 698675131, Tel. +213 666132069, Tel. +213 771250811Correspondence[email protected]
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Atika NafaLaboratory of Water and Raw Material Quality, Environment Department, Central Laboratory, Direction Metallurgy–Quality, Complex Arcelor-Mittal, Annaba, Algeria, Tel. +213 770956685, Tel. +213 770997617Correspondence[email protected]
&
Salah KheriafLaboratory of Water and Raw Material Quality, Environment Department, Central Laboratory, Direction Metallurgy–Quality, Complex Arcelor-Mittal, Annaba, Algeria, Tel. +213 770956685, Tel. +213 770997617Correspondence[email protected]
 show all
Pages 3522-3531 | Received 20 Jan 2014, Accepted 31 Oct 2014, Published online: 26 Nov 2014
 
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Abstract

The objective of this study was the use of raw and modified coke material for the adsorption of cyanide ions (CN−) in water. The surface functions of this material (carboxyl, lactones, phenol, and carbonyl) were modified by oxidation with sulfuric acid, nitric acid, and KMnO4 solution at varying concentrations. This chemical surface treatment improved the adsorption capacity. The experimental results of adsorbent/adsorbate equilibrium show that the adsorption isotherms follow the Freundlich model and the kinetic adsorption follows the pseudo-second-order model. Overall, coke material oxidized by KMnO4 has shown the best adsorption of CN− ions with an adsorption capacity qe = 1.28 mg g−1 at T = 20°C and pH 11.

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