Record Display for the EPA National Library Catalog

RECORD NUMBER: 4 OF 4

OLS Field Name OLS Field Data
Main Title Oxidation-Reduction Capacities of Aquifer Solids.
Author Barcelona, M. J. ; Holm, T. R. ;
CORP Author Western Michigan Univ., Kalamazoo. ;Illinois State Water Survey Div., Champaign.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1991
Year Published 1991
Report Number EPA-R813149; EPA/600/J-91/238;
Stock Number PB92-110410
Additional Subjects Oxidation reduction reactions ; Sand aquifers ; Aquifer management ; Water pollution control ; Ground water ; Hydrogen peroxide ; Electron transfer ; Microorganisms ; Reaction kinetics ; Chromium oxides ; Reprints ; Poising capacity ; Aquifer solids
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB92-110410 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 02/24/1992
Collation 9p
Abstract
Oxidation-reduction processes play a major role in the mobility, transport, and fate of inorganic and organic chemical constituents in natural waters. Therefore, the manipulation of redox conditions in natural and treated water systems is assumed to be a common option for the control of contaminant concentrations. Measurements of the oxidation (i.e., of aqueous Cr(2+)) and reduction (i.e., of aqueous Cr2O7(2-) and H2O2) capacities of aquifer solids and groundwater have been made on samples from a sand-and-gravel aquifer. The groundwater contributed less than 1% of the system oxidation or reduction poising capacity. Reduction capacities averaged 0.095, 0.111, and 0.136 mequiv/g of dry solids for oxic, transitional, and reducing Eh conditions, respectively. Measured oxidation capacities averaged 0.4 mequiv/g of dry solids over the range of redox intensity conditions. These capacities represent considerable resistance to the adjustment of redox conditions even at uncontaminated sites. Hydrogen peroxide reduction by aquifer solid samples proceeds rapidly relative to microbially mediated decomposition. The study indicates the need for closer scrutiny of the predictability and cost effectiveness of attempts to manipulate redox conditions in poorly poised aquifer systems.