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Study of cesium sorption on Na and Ca-Mg bentonites using batch and diffusion experiments

  • Radionuclides In The Environment, Radioecology
  • Published:
Czechoslovak Journal of Physics Aims and scope

Abstract

In this study the cesium sorption on two different bentonites (Ca-Mg bentonite Rokle and Na bentonite Volclay KWK 20–80) has been compared using two different experimental approaches — batch and diffusion methods. The distribution coefficients (Kds) calculated for variable liquid-to-solid ratio (batch) and dry density (diffusion) were evaluated with respect to the main uncertainties affecting both approaches. It has been concluded that there are significant differences between selected bentonites in mineral composition, cation exchange capacity (CEC) and sorption characteristics. The Kd values calculated from batch sorption and diffusion data were found comparable only for Na bentonite Volclay KWK 20–80. The considerably higher sorption of Cs on Ca-Mg bentonite Rokle was explained by its higher content of cesium-selective sorbents (illite, vermiculite).

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Authors and Affiliations

  1. Nuclear Research Institute Řež, 250 68, Řež, Czech Republic

    J. Vejsada & A. Vokál

  2. Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 11519, Prague 1, Czech Republic

    D. Vopálka

  3. Centre for Radiochemistry and Radiation Chemistry, Czech Technical University in Prague, Břehová 7, 11519, Prague 1, Czech Republic

    H. Filipská

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  1. J. Vejsada
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  2. A. Vokál
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  3. D. Vopálka
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  4. H. Filipská
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Vejsada, J., Vokál, A., Vopálka, D. et al. Study of cesium sorption on Na and Ca-Mg bentonites using batch and diffusion experiments. Czech J Phys 56, D73–D79 (2006). https://doi.org/10.1007/s10582-006-1001-x

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  • DOI: https://doi.org/10.1007/s10582-006-1001-x

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