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RECORD NUMBER: 29 OF 32

OLS Field Name OLS Field Data
Main Title Spatial heterogeneity of geochemical and hydrologic parameters affecting metal transport in ground water /
Author Davis, J. A. ; Fuller, C. C. ; Coston, J. A. ; Hess, K. M. ; Dixon, E.
Other Authors
Author Title of a Work
Davis, J. A.
CORP Author Geological Survey, Menlo Park, CA.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher U.S. Environmental Protection Agency, Research and Development, Robert S. Kerr Environmental Research Laboratory,
Year Published 1993
Report Number EPA/600-S-93-006
Stock Number PB94-114774
OCLC Number 29241815
Subjects Groundwater--United States. ; Soil absorption and adsorption--United States.
Additional Subjects Water pollution ; Ground water ; Environmental transport ; Metals ; Geochemistry ; Adsorption ; Surface chemistry ; Soils ; Sediments ; Spatial distribution ; Rocks ; Aquifers ; Hydrology ; Lead(Metal) ; Zinc
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=2000CAY2.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EHAM  TD427.M44S63 1993 Region 1 Library/Boston,MA 04/29/2016
EJAD  EPA 600/S-93-006 Region 3 Library/Philadelphia, PA 04/04/2011
EJBD ARCHIVE EPA 600-S-93-006 In Binder Headquarters Library/Washington,DC 11/01/2017
EJBD  EPA 600-S-93-006 c.1-2 Headquarters Library/Washington,DC 09/08/2010
EKAM  EPA/600/S-93/006 Region 4 Library/Atlanta,GA 03/18/1994
ELBD  EPA 600-S-93-006 AWBERC Library/Cincinnati,OH 04/25/1998
EMBD  EPA/600/S-93/006 GWERD Library/Ada,OK 12/28/2001
ESBD  EPA-600-S-93-006 NHEERL/WED Library/Corvallis,OR 03/17/1995 DISPERSAL
NTIS  PB94-114774 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 22 pages : illustrations, map ; 28 cm.
Abstract
Reliable assessment of the hazards or risks arising from groundwater contamination requires the capability to predict the movement and fate of dissolved solutes in groundwater. The modeling of metal transport in groundwater requires adsorption coefficients to describe ion adsorption. Metal-ion sorption in natural systems is usually thought to be controlled by surface reactions with Fe and Al oxyhydroxides and organic coatings on particles. The importance of surface coatings makes it difficult to relate the bulk mineralogical composition of a sample to its adsorptive reactivity. Determining the predominant adsorbing surface in a mineral assemblage can be a useful approach to modeling adsorption with a surface complexation model. One objective of this study was to search for a geochemical 'indicator' of the mineral surface(s) controlling lead (Pb) and zinc (Zn) sorption on the aquifer sand. The spatial variability of parameters used in models for solute transport in groundwater are of significance in the simulations of solute movement. Variability of hydraulic conductivity has been shown to be a key cause of observations of macroscale dispersion in sand and gravel aquifers. Like hydraulic conductivity, adsorption coefficients and other geochemical properties of the porous medium are expected to be spatially variable. In this study, 14 continuous cores of subsurface material were collected from a shallow sand and gravel aquifer where the spatial variability of hydraulic conductivity had been previously studied. Each core was sectioned into subsamples. Measurements were made of: (1) grain size distribution to estimate hydraulic conductivity and (2) lead and zinc adsorption for a constant set of experimental conditions.
Notes
Caption title. Shipping list no.: 93-0598-P. "August 1993." Includes bibliographical references (pages 21-22). "EPA/600-S-93-006."