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- Title
Diffusion of cesium and selenium in crushed mudrock.
- Authors
Lee, Chuan-Pin; Wei, Y. Y.; Tsai, S. C.; Teng, S. P.; Hsu, C. N.
- Abstract
In this study, the diffusion behavior of cesium and selenium with 10−4M concentration in mudrock was studied by trough-diffusion tests and summarized in order to provide confidence on long-term performance assessment of nuclear waste repositories. The diffusion process of Cs and Se reached equilibrium after 60 and 500 days, respectively. Besides, it also displays that the distribution coefficients ( K d) of Se in through-diffusion tests is higher than that of Cs in agreement with that obtained from the batch method. The K d value (15.14±1.99 mL/g) of Cs by diffusion techniques is equivalent to that of batch method (15.10±0.40 mL/g) because sorption of Cs was assumed to fast sorption step. However, the K d value of Se (137.58±12.20 mL/g) derived from the diffusion technique is higher than that from batch tests (76.72±2.96) and showed an obvious variation with K d of Cs. The difference of K d between diffusion and batch methods resulted from the fact that 14 days were not long enough to reach equilibrium or stable state in the batch method.
- Subjects
CESIUM metallurgy; SELENIUM; DIFFUSION; PARTITION coefficient (Chemistry); BATCH processing
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2009, Vol 279, Issue 3, p761
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-008-7355-8