Removal of copper ions from aqueous solution by adsorption using LABS-modified bentonite (organo-bentonite)

Sandy, Sandy, Maramis, Velycia, Kurniawan, Alfin, Ayucitra, Aning, Sunarso, Jaka and Ismadji, Suryadi (2012) Removal of copper ions from aqueous solution by adsorption using LABS-modified bentonite (organo-bentonite). Removal of copper ions from aqueous solution by adsorption using LABS-modified bentonite (organo-bentonite), 6 (1). pp. 58-66. ISSN 20950179, 20950187

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Abstract

Equilibrium, kinetic and thermodynamic aspects of the adsorption of copper ions from an aqueous solution using linear alkylbenzene sulfonate (LABORATORIES) modified bentonite (organo-bentonite) are reported. Modification of bentonite was performed via microwave heating with a concentration of LABORATORIES surfactant equivalent to 1.5 times that of the cation exchange capacity (CEC) of the raw bentonite. Experimental parameters affecting the adsorption process such as pH, contact time and temperature were studied. Several adsorption equations (e.g., Langmuir, Freundlich, Sips and Toth) with temperature dependency were used to correlate the equilibrium data. These models were evaluated based on the theoretical justifications of each isotherm parameter. The Sips model had the best fit for the adsorption of copper ions onto organo-bentonite. For the kinetic data, the pseudo-second order model was superior to the pseudo-first order model. Thermodynamically, the adsorption of copper ions occurs via chemisorption and the process is endothermic (ΔH0>0), irreversible (ΔS0>0) and nonspontaneous (ΔG0>0).

Item Type: Article
Uncontrolled Keywords: heavy metal, copper, adsorption, organobentonite, temperature dependent
Subjects: Engineering > Chemical Engineering
Divisions: Journal Publication
Depositing User: F.X. Hadi
Date Deposited: 22 Nov 2023 05:25
Last Modified: 23 Jan 2024 09:17
URI: http://repository.ukwms.ac.id/id/eprint/37399

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