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

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      Author
      Shahwan, T.
      Erten, H. N.
      Date
      2004
      Source Title
      Journal of Radioanalytical and Nuclear Chemistry
      Print ISSN
      0236-5731
      Publisher
      Akademiai Kiado Rt.
      Volume
      260
      Issue
      1
      Pages
      43 - 48
      Language
      English
      Type
      Article
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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.
      Keywords
      Aluminum silicate
      Barium ion
      Chlorine derivative
      Tracer
      Concentration (parameters)
      Ion exchange
      Isotherm
      Temperature sensitivity
      X ray diffraction
      Permalink
      http://hdl.handle.net/11693/24239
      Published Version (Please cite this version)
      http://dx.doi.org/10.1023/B:JRNC.0000027059.66424.b4
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