Intragranular diffusion; an important mechanism influencing solute transport in clastic aquifers?
Wood WW, Kraemer TF, Hearn PP. 1990. Intragranular diffusion; an important mechanism influencing solute transport in clastic aquifers?. Science. 247(4950):1569-1572
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 shor-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.
- Type
- Journal Article
- Authors
- Wood, Warren; Kraemer, Thomas; Hearn, Paul
- Units
- CACO
- Keywords
- Aquifers, Barnstable County Massachusetts, Cape Cod, Clastic Sediments, Diffusion, Eastern U.S., Eastern United States, Experimental Studies, feldspar group, fluorescence, Framework Silicates, Geochemistry, Geology, Ground Water, Hydrogeology, intragranular diffusion, Massachusetts, mica group, New England, outwash, Pleistocene, Pollution, Porosity, Processes, Quartz, Quaternary, SEM data, sheet silicates, silica minerals, Silicates, solutes, Southeastern Massachusetts, Tracers, Transport, unsaturated zone, Waste Disposal