Analyzing porosity of compacted bentonite via through diffusion method
- Resource Type
- Original Paper
- Authors
- Feng, Zhengye; Tian, Junlei; Shi, Xiaoqiong; Wang, Chao; Wu, Tao
- Source
- Journal of Radioanalytical and Nuclear Chemistry: An International Journal Dealing with All Aspects and Applications of Nuclear Chemistry. 333(3):1185-1193
- Subject
- Effective diffusion coefficient
Diffuse double-layer
Bentonite
Multi-porosity model
Through-diffusion experiment
- Language
- English
- ISSN
- 0236-5731
1588-2780
The diffusion behavior of ReO4− (as a surrogate for 99TcO4−) and HSeO3− (as a surrogate for 79HSeO3−) in compacted Wyoming bentonite was investigated. A through-diffusion experiment was conducted to measure the effective diffusion coefficient and the accessible porosity at high salinity. Two multi-porosity models (MP1 and MP2) were employed to analyze the effect of compaction on the accessible porosity, the diffuse double-layer porosity, and the interlayer porosity. The diffuse double-layer porosity increased with increasing the external surface area.