Diffusion and Gas Flow Dynamics in Partially Saturated Smectites.

ABSTRACT: Clays and clay rocks are considered good natural and engineered barriers for deep geological disposal of nuclear waste worldwide. Metal corrosion and organic waste degradation in underground repositories generate significant amounts of gas that should be able to migrate through the multibarrier system to avoid potential pressure buildup, which could be compromising the integrity of the barriers and host rocks. The gas is expected to accumulate in larger pores and eventually form an interconnected network. Under such conditions, the migration of gas molecules takes place both in pore water films and gas-filled macropores. Therefore, mass fluxes depend on the distribution of gas molecules between the water-rich and gas-rich phases and their mobility in both compartments. Classical molecular

SUBMITTER: Owusu JP 

PROVIDER: S-EPMC10389780 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature