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- Title
Preliminary evaluation of SEM/EDS technique for the determination of colloid diffusion coefficient in granite matrix.
- Authors
Tsai, Tsuey-Lin; Shih, Yu-Hung; Chen, Liang-Cheng; Tsai, Shih-Chin; Lee, I-Hsien; Lee, Chuan-Pin; Su, Te-Yen
- Abstract
Colloids present high sorption for many solutes and are considered potential contaminant carriers in geological environments. Experimental quantitative data are required for an adequate description of colloid-mediated transport within natural media. In this paper, the line scan function of SEM/EDS was firstly applied to study colloid diffusion by depth profile in crystalline rock and the apparent diffusion coefficient was estimated to be ~ 6E−18 m2/s for 20 nm gold colloids. This technique can be applied to the prediction of colloid-facilitated radionuclide transport through water-saturated fractured porous rock for safety assessment of geological disposal for high-level radioactive waste.
- Subjects
DIFFUSION coefficients; RADIOACTIVE waste disposal; COLLOIDAL gold; COLLOIDS; CRYSTALLINE rocks; GRANITE
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2019, Vol 322, Issue 3, p1803
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-019-06915-w