Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Laboratory Studies on the Stability and Transport of Inorganic Colloids Through Natural Aquifer Material (Chapter 49).
Author Puls, R. W. ; Powell, R. M. ;
CORP Author Robert S. Kerr Environmental Research Lab., Ada, OK. ;ManTech Environmental Technology, Inc., Ada, OK.;Department of Energy, Washington, DC. Environmental Sciences Div.
Publisher c1993
Year Published 1993
Report Number EPA/600/A-93/072;
Stock Number PB93-175537
Additional Subjects Arsenates ; Colloids ; Environmental transport ; Water pollution ; Aquifers ; Inorganic compounds ; Stability ; Permeability ; Flow rate ; Iron oxides ; Ground water ; Ions ; Clay minerals ; Electrolytes ; Particle size ; Adsorption ; Porous media ; Concentration(Composition) ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB93-175537 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/23/1993
Collation 6p
Colloids are generally defined as inorganic or organic particles with diameters less than 10 microns. Colloidal material may be released from the soil or geologic matrix and transported large distances given favorable hydrological and geochemical conditions. Once released, the primary factors controlling colloidal transport in subsurface systems are colloidal stability, flow rate, and the nature of the solid matrix through which ground water flows. In addition to having a high surface area per unit mass, colloids such as clay minerals and iron oxides are also extremely reactive sorbents for metals and other contaminants. If mobile in subsurface systems, these colloids can effect the migration of sorbed contaminants much larger distances than current transport models would predict. Column experiments were run to determine the effects of pH, flow rate, ionic strength, electrolyte composition, particle size and particle concentration on colloidal stability and transport.