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Removal of copper ions from aqueous solutions by kaolinite and batch design

Author:: Alkan, Mahir Kalay, Burcu Dogan, Mehmet Demirbas, Oezkan
Journal:: JOURNAL OF HAZARDOUS MATERIALS
Issue Date:: 2008
Abstract(summary):: The removal of copper ions from aqueous solutions by kaolinite was investigated by using a batch-type method. Effects of factors such as pH, ionic strength, temperature, acid-activation and calcination on copper adsorption were investigated. The uptake of copper was determined from changes in concentration as measured by atomic absorption spectrometry. The extent of copper adsorption increased with increasing pH and temperature and with decreasing ionic strength, acid-activation and calcination temperature. The Langmuir and Freundlich adsorption models were used to determine the isotherm parameters associated with the adsorption process. The results provide support for the adsorption of copper ions onto kaolinite. Thermodynamic parameters indicated the endothermic nature of copper adsorption on kaolinite. The experimental results were applied a batch design. As a result, the kaolinite may be used for removal of copper ions from aqueous solutions. (c) 2007 Elsevier B.V. All rights reserved.
Page:: 867---876

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Removal of copper ions from aqueous solutions by kaolinite and batch design

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