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

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 concen...

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Bibliographic Details
Published in:Journal of hazardous materials 2008-05, Vol.153 (1), p.867-876
Main Authors: Alkan, Mahir, Kalay, Burcu, Doğan, Mehmet, Demirbaş, Özkan
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Chemical engineering
Copper - chemistry
Copper ion
Exact sciences and technology
Hydrogen-Ion Concentration
Kaolin - chemistry
Kaolinite
Osmolar Concentration
Pollution
Solutions
Spectroscopy, Fourier Transform Infrared
Sulfuric Acids - chemistry
Temperature
Waste Disposal, Fluid - methods
Water Pollutants, Chemical - chemistry
Water Purification - methods
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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.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2007.09.047