Document Type : Regular Article
Authors
1
Department of Petrochemical, Faculty of Technology, University of 20 Août 1955 Skikda, Algeria
2
Laboratory of catalysis, bioprocess and environment, Department of Process Engineering, Faculty of Technology, 20 August 1955 University of Skikda, P.O. Box 26, El Hadaik Road, 21000, Skikda, Algeria
3
Department of Process Engineering, Faculty of Technology, 20 August 1955 University of Skikda, P.O. Box 26, El Hadaik Road, 21000, Skikda, Algeria
4
Laboratory of Water Treatment and Valorization of Industrial Wastes, Department of Chemistry, Faculty of Sciences, Badji-Mokhtar University, B.P.12, Annaba 23000, Algeria
10.22036/pcr.2023.363375.2206
Abstract
This study investigated the potential of Algerian kaolin clay exchanged with protons as an inexpensive adsorbent for malachite green (MG) dye elimination from colored effluents using batch equilibrium experiments. Before using the kaolin as an adsorbent, it was treated with HCl (0.1 M). The structural, compositional, and textural characteristics of the Tamazert kaolin (TK) and the treated Tamazert kaolin (tTK) were determined using physicochemical and mineralogical characterizations. The optimization of miscellaneous experimental parameters such as contact time, adsorbent dose, temperature, and initial pH solution was conducted through batch adsorption experiments. The findings of the experiment revealed that 30 minutes of contact time was adequate to achieve liquid-solid phase equilibrium. The highest adsorption capacity of MG dye was reached at 18.51 mg/g. The adsorption kinetics followed the pseudo-first-order model. The adsorption isotherms showed a correlation between the Freundlich model and the experimental results. Changes in enthalpy, Gibbs free energy and entropy were computed.
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