Determination of sorption and diffusion parameters of 99Tc in crushed granite using through-diffusion experiments
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- 作者：Yu-Hung Shih ; Tsuey-Lin Tsai…
- 关键词：Sorption ; Through diffusion ; Granite ; Distribution coefficient (Kd)
- 刊名：Journal of Radioanalytical and Nuclear Chemistry
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：311
- 期：2
- 页码：1111-1116
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Nuclear Chemistry; Physical Chemistry; Nuclear Physics, Heavy Ions, Hadrons; Diagnostic Radiology; Inorganic Chemistry;
- 出版者：Springer Netherlands
- ISSN：1588-2780
- 卷排序：311
文摘
Diffusion and sorption are important processes associated with radionuclides migration in crystalline rock. These processes are studied in the laboratory using borehole core samples. In this study, we obtained distribution coefficients (Kd), apparent diffusion coefficients (Da) and retardation factor (Rf) using batch and through-diffusion experiments. The \( R_{\text{f}}^{\text{H/Tc}} \) and \( K_{\text{d}}^{\text{H/Tc}} \) values obtained using the accumulative concentration method were lower than those derived in the batch experiments. These findings demonstrate that reliable Rf and Kd values of 99Tc can be obtained using through-diffusion experiments with a non-reactive radiotracer, thereby bolstering confidence in the assessment of the long-term performance of disposal repositories.