Sorption of Cs(I) and Sr(II) on a mixture of bentonite and magnetite using SCM + IExM: A parametric study |
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| Authors: | H Filipská K Štamberg |
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| Institution: | (1) Centre for Radiochemistry and Radiation Chemistry, Czech Technical University, Břehová 7, 115 19 Prague 1, Czech Republic;(2) Department of Nuclear Chemistry, Faculty of Nuclear Science and Physical Engineering, Czech Technical University, Břehová 7, 115 19 Prague 1, Czech Republic |
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| Abstract: | Summary The sorption of Cs(I) and Sr(II) on bentonite and magnetite was experimentally studied and numerically simulated using surface
complexation (SCM) and ion-exchange (IExM) models. The empirical system consisted of: (1) synthetic granitic water with a
given ionic strength (0.1 or 0.01 NaNO3), (2) radionuclides studied (10-6M CsCl or SrCl2 . 6H2O spiked with 137Cs or 85Sr), and (3) bentonite pre-treated with the aim to remove carbonates, and magnetite as a representative of steel canister
corrosion products. The parametric study covered, e.g., the influence of pH, bentonite to magnetite ratio and volume-liquid
ratio on the values of selectivity coefficients and Kd. |
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