Diffusion of cesium and selenium in crushed mudrock

Chuan-Pin Lee, Y. Y. Wei, S. C. Tsai, S. P. Teng, C. N. Hsu

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)761-768
Number of pages8
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume279
Issue number3
DOIs
Publication statusPublished - 2009 Mar 1

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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