A review of the literature was undertaken primarily with the goal of discerning the types of
diffusion coefficients that have been reported with respect to diffusion of radionuclides …

The mineralogical and chemical properties of clays have been the subject of longstanding
study in the research community—in fact, entire journals are devoted to the topic. In the field …

Compacted Na-bentonite clay barriers, widely used in the isolation of solid-waste landfills
and other contaminated sites, have been proposed for a similar use in the disposal of high …

When CO 2 is injected into storage reservoirs, buoyancy drives flow upward towards
overlying caprock layers that retard flow. Caprocks are commonly shale formations with …

The transport properties (porosity, surface‐to‐volume ratio of the pore space, diffusion
coefficient, and permeability) of a porous medium were calculated by image analysis and …

A well-known characteristic of clay-rocks and engineered bentonite barriers is their low
hydraulic permeability. In porous media with such low k values, at hydraulic pressure …

Medical X-ray computed tomography (CT) was applied to the measurement of the diffusion
coefficients of heavy ions in an artificial barrier material for the disposal of nuclear wastes …

The anion adsorption capability of clays can be improved significantly by modification with
certain organic cations. However, surface properties and the microstructure of the clay might …

Studying diffusive transport in porous rocks is of fundamental importance in understanding a
variety of geochemical processes including: element transfer, primary mineral dissolution …

In water-rich smectite gels, bound or less mobile H2O layers exist near negatively-charged
clay platelets. These bound H2O layers are obstacles to the diffusion of unbound H2O …