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Temperature effects in barium sorption on natural kaolinite and chlorite-illite clays

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Abstract

The sorption of Ba2+ ion on natural kaolinite and chlorite-illite clays was investigated at different initial concentrations and temperatures using the radiotracer method. The sorption data were well described by Freundlich and Dubinin-Radushkevich isotherms. Ba2+ sorption on both clays showed an exothermic behavior with ΔH° (kJ/mol) values being -7 and -5 for sorption on kaolinite and chlorite illite mixed clay, respectively. The ΔG° values indicate that the sorption was spontaneous with sorption energies corresponding to ion-exchange type sorption. X-ray diffraction studies showed that no significant change in the matrix of the clays occurred upon Ba2+ sorption.

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Authors and Affiliations

  1. Department of Chemistry, Bilkent University, 06800, Bilkent, Ankara, Turkey

    T. Shahwan & H. N. Erten

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  1. T. Shahwan
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  2. H. N. Erten
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Shahwan, T., Erten, H.N. Temperature effects in barium sorption on natural kaolinite and chlorite-illite clays. Journal of Radioanalytical and Nuclear Chemistry 260, 43–48 (2004). https://doi.org/10.1023/B:JRNC.0000027059.66424.b4

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  • DOI: https://doi.org/10.1023/B:JRNC.0000027059.66424.b4

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