Discrete modelling of contaminant diffusion in porous media with sorption

- Pore space-informed model for meso-scale diffusion with limited experimental data.
- Sorption effects and up-scaling via film coefficients incorporated.
- Pore space structure and solute size control topology of diffusion network.
- Macroscopic validation for radionuclide diffusion in bentonite.
- Transient diffusion descriptors for experimental meso-scale validation proposed.