Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Concentration Gradients in Aquifers.
Author Kem, Marwin K. ;
CORP Author Oklahoma Water Resources Research Inst., Stillwater.
Year Published 1971
Report Number OWRR-A-025-OKLA; 02055,; A-025-OKLA(1)
Stock Number PB-219 875
Additional Subjects ( Brines ; Ground water) ; ( Aquifers ; Temperature gradients) ; Clays ; Mass transfer ; Bentonite ; Membranes ; Thermodynamic properties ; Concentration(Composition) ; Transport properties ;
Library Call Number Additional Info Location Last
NTIS  PB-219 875 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 9p
An investigation of the effects of a thermal gradient on the transfer of electrolyte across clay membranes was begun. The purpose of the study was to determine the role of this phenomenon, thermal pumping, on the observed concentration increase of subsurface brines with depth. Little, if any, transport has been observed for Wyoming Bentonite membranes with dilute sodium chloride solutions. Preliminary electromotive force measurements with Ag/AgCl electrodes indicate an increasing potential with increasing temperature gradient (hot side positive). This result indicates that transport should occur. The absence of transport may be indicative of a very slow process. (Author)