Argillaceous formations generally act as aquitards because of their low hydraulic
conductivities. This property, together with the large retention capacity of clays for cationic …

Layered nanohybrids are heterostructured materials composed of two-dimensional
inorganic host and intercalating inorganic-, organic-, bio-, or polymer guests. Such materials …

The hydrogeochemical transport model PHREEQC was extended with options to calculate
multicomponent diffusion in free pores and in the diffuse double layer (DDL). Each solute …

Diffusion experiments with HTO, 36Cl−, Br−, I−, 22Na+, 85Sr2+ and 134Cs+ at trace
concentrations in a single sample of Opalinus Clay are modeled with PHREEQC's …

Carbon capture and storage (CCS) is likely to be a critical technology to achieve large
reductions in global carbon emissions over the next century. Research on the subsurface …

Anisotropic diffusion was studied in Opalinus Clay, a potential host rock for disposal of spent
fuel, vitrified high-level waste, and long-lived intermediate-level waste in Switzerland …

The multiscale modelling of geochemical processes requires efficient couplings between
scales and physics. The use of machine learning techniques and neural networks has the …

Clay rocks are low permeability sedimentary formations that provide records of Earth history,
influence the quality of water resources, and that are increasingly used for the extraction or …

Diffusion of cations and other contaminants through clays is of central interest, because
clays and clay rocks are widely considered as barrier materials for waste disposal sites. An …

In November 1999 Andra began building an Underground Research Laboratory (URL) on
the border of the Meuse and Haute-Marne departments in eastern France. The research …