Czechoslovak Journal of Physics

, Volume 56, Supplement 4, pp D73–D79 | Cite as

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

  • J. Vejsada
  • A. Vokál
  • D. Vopálka
  • H. Filipská
Article

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).

Keywords

Bentonite Cation Exchange Capacity Compact Bentonite Bentonite Sample Deep Geological Repository 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Institute of Physics, Academy of Sciences of Czech Republic 2006

Authors and Affiliations

  • J. Vejsada
    • 1
  • A. Vokál
    • 1
  • D. Vopálka
    • 2
  • H. Filipská
    • 3
  1. 1.Nuclear Research Institute ŘežŘežCzech Republic
  2. 2.Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PraguePrague 1Czech Republic
  3. 3.Centre for Radiochemistry and Radiation ChemistryCzech Technical University in PraguePrague 1Czech Republic

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