Abstract
The ability of the regolith to adsorb and retard radioactive and other noxious
chemicals is important when selecting repository sites. Because of its surface
charge and great specific surface, the clay in soil contributes significantly
to this retardation. This paper illustrates a novel analysis of unsteady water
and solute flow in unsaturated soil that quantifies these effects. Analysis
and experiments suggest that the use of a clay-based space-like coordinate
permits us to generalise results to account for variation in clay content and
soil structure across many materials. Results imply that clay content,
mineralogy, and charge permit quantitative material classification according
to their ability to retard cationic wastes. The approach appears to offer
significant economies in selecting materials where adsorption and retardation
of cation pollutants is desired.
Subject
Earth-Surface Processes,Soil Science,Environmental Science (miscellaneous)
Cited by
7 articles.
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