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RECORD NUMBER: 229 OF 382

OLS Field Name OLS Field Data
Main Title Mineral Dissolution Rates: A Comparison of Laboratory and Field Studies.
Author Swoboda-Colberg, N. G. ; Drever, J. I. ;
CORP Author Wyoming Univ., Laramie.;Corvallis Environmental Research Lab., OR.
Publisher c1992
Year Published 1992
Report Number EPA/600/A-92/293;
Stock Number PB93-141182
Additional Subjects Minerals ; Dissolving ; Water pollution ; Soil surveys ; Bear Brook ; Comparison ; Experimental design ; Field tests ; Water chemistry ; Acidification ; Weathering ; Kinetics ; Maine ;
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB93-141182 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/12/1993
Collation 5p
Abstract
Dissolution rates of the 75-150 micrometer size fraction of soil from the Bear Brook site in Maine were measured in flow-through reactors and compared to rates measured in small-plot field experiments at the Bear Brook site. The use of small plots and 'untreated' minerals from the same location eliminated many of the uncertainties previously encountered in field-laboratory comparisons. Field dissolution rates, normalized on the basis of geometrical mineral surface area, were smaller than laboratory rates by a factor of about 150. This discrepancy might be due to the fact that the dissolution rate is not proportional to the geometrical surface area over the whole range of grain sizes. Other explanations are imperfect contact between soil minerals and percolating solution, or inhibitory effects of high dissolved aluminum concentrations.