Citation:

Barcelona, M. J. AND T. R. Holm. OXIDATION-REDUCTION CAPACITIES OF AQUIFER SOLIDS. ENVIRONMENTAL SCIENCE & TECHNOLOGY 25(9):1565-1572, (1991).

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Description:

Measurements of the oxidation (i.e., of aqueous Cr²⁺) and reduction (i.e., of aqueous Cr₂O₇^2- and H₂0₂) 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 E_h 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 sam- ples proceeds rapidly relative to microbially mediated decomposition. This study indicates the need for closer scrutiny of the predictability and cost effectiveness of attempts to manipulate redox conditions in poorly poised aquifer systems.

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OXIDATION-REDUCTION CAPACITIES OF AQUIFER SOLIDS  

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Record Details:

Record Type:DOCUMENT( JOURNAL/ PEER REVIEWED JOURNAL)

Product Published Date:09/01/1991

Record Last Revised:04/10/2009

OMB Category:Other

Record ID: 128781

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Access Procedures :EPA ONLY

Document IDs:

EPA Number :EPA/600/J-91/238