Analyzing porosity of compacted bentonite via through diffusion method

The diffusion behavior of ReO 4 − (as a surrogate for 99 TcO 4 − ) and HSeO 3 − (as a surrogate for 79 HSeO 3 − ) 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.