Intragranular Diffusion: An Important Mechanism Influencing Solute Transport in Clastic Aquifers?

Details Intragranular Diffusion: An Important Mechanism Influencing Solute Transport in Clastic Aquifers? Intragranular Diffusion: An Important Mechanism Influencing Solute Transport in Clastic Aquifers?

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990sci...247.1569w&link_type=abstract

Science, Volume 247, Issue 4950, pp. 1569-1572

Physics

22

Scientific paper

Quantification of intragranular porosity in sand-size material from an aquifer on Cape Cod, Massachusetts, by scanning electron microscopy, mercury injection, and epifluorescence techniques shows that there are more reaction sites and that porosity is greater than indicated by standard short-term laboratory tests and measurement techniques. Results from laboratory and field tracer tests show solute nonequilibrium for a reacting ion consistent with a model of diffusion into, and exchange within, grain interiors. These data indicate that a diffusion expression needs to be included in transport codes, particularly for simulation of the transport of radioactive and toxic wastes.

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