Removal of Cu(II), Cd(II) and Cr(III) ions from aqueous solution by dam silt |
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Authors: | Fatima Ouadjenia-Marouf Reda Marouf Jacques Schott Ahmed Yahiaoui |
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Institution: | 1. Laboratoire de Chimie, Département des Sciences de la Matière, Université de Mascara, Algeria;2. Laboratoire des Mécanismes de Transferts en Géochimie, CNRS (UMR 5563)-OMP-Université Paul-Sabatier, Toulouse, France |
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Abstract: | The removal of heavy metals, such as Cu(II), Cd(II) and Cr(III) from aqueous solution was studied using Chorfa silt material (Mascara, Algeria). The main constituents of silt sediment are quartz, calcite and mixture of clays. The experimental data were described using Freundlich, Langmuir, Dubinin–Radushkevich (D–R) and Langmuir–Freundlich models. The adsorbed amounts of chromium and copper ions were very high (95% and 94% of the total concentration of the metal ions), whereas cadmium ion was adsorbed in smaller (55%) amounts. The Langmuir–Freundlich isotherm model was the best to describe the experimental data. The maximum sorption capacity was found to be 26.30, 11.76 and 0.35 mg/g for Cr3+, Cu2+ and Cd2+, respectively. The results of mean sorption energy, E (kJ/mol) calculated from D–R equation, confirmed that the adsorption of copper, chromium and cadmium on silt is physical in nature. |
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Keywords: | Heavy metals Silt Adsorption Isotherms models |
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