دورية
Sorption of Sn and Nb on montmorillonite at neutral to alkaline pH
| العنوان: | Sorption of Sn and Nb on montmorillonite at neutral to alkaline pH |
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| المؤلفون: | Ishidera, Takamitsu, Okazaki, Mitsuhiro, Yamada, Yoshihide, Tomura, Tsutomu, Shibutani, Sanae |
| المصدر: | Journal of Nuclear Science and Technology; May 2023, Vol. 60 Issue: 5 p536-546, 11p |
| مستخلص: | ABSTRACTThe distribution coefficient (Kd) value of radionuclides is an important parameter in the radionuclide migration analysis in the safety assessment of the geological disposal of high-level radioactive waste. To improve the reliability of safety assessment, the Kdvalues must be extensively evaluated, particularly under conditions where they might be decreased. In this study, the pH dependence of the Kdvalues for Sn and Nb on montmorillonite was evaluated using batch sorption experiments at neutral to alkaline pH, which might be caused by the leaching of cementitious materials and the corrosion of carbon steel. The Kdvalues were determined in the range 8 < pH < 12 by the experiments and were found to decrease with increasing pH. A model calculation using a thermodynamic sorption model was conducted on the measured pH dependence of the Kdvalues. Two different sorption sites were required to describe the pH dependence of the Kdvalues of Sn in the model calculation, whereas one sorption site was considered predominant in the sorption of Nb. |
| قاعدة البيانات: | Supplemental Index |
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Full Text Finder | تدمد: | 00223131 18811248 |
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| DOI: | 10.1080/00223131.2022.2125453 |