Adsorption behavior of cesium on montmorillonite-type clay in the presence of potassium ions


Atun G. , Kilislioğlu A.

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, vol.258, no.3, pp.605-611, 2003 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 258 Issue: 3
  • Publication Date: 2003
  • Doi Number: 10.1023/b:jrnc.0000011757.59069.ba
  • Title of Journal : JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
  • Page Numbers: pp.605-611

Abstract

The adsorption behavior of Cs ions on a montmorillonite-type clay was investigated in the presence of potassium ions, using a radiotracer technique. The initial concentration of K+ added to the CsCl was between 10(-4) and 10(-1) mol/l. The addition of K+ to the CsCl solution at different concentrations (10(-6)-10(-2) mol/l) reduced the amount of Cs+ adsorbed on clay. The maximum ratio of Cs+ exchanged, calculated from a linearized form of Langmuir plot was in agreement with the ion exchange isotherms of Cs-K ions. Sorption energy evaluated from the graph of corrected selectivity coefficients vs. equivalent fraction of Cs in the solid phase was compared to the energy values obtained from Dubinin-Radushkevich (D-R) isotherms. Freundlich isotherm parameters were used to characterize a site distribution function, which provides information about the affinity ratio of the adsorption sites of Cs+ and K+ ions. The ion exchange isotherm of Cs-K systems exhibited a Langmuir type curve for all K+ concentrations.