Anionic co-contaminants and the biogeochemical evolution of aquifer heterogeneity. Technical progress report, 1 August 1993--31 July 1994
Organic acids, chelators, and radionuclide-organic complexes are key contaminants at DOE waste sites. The proposed research addresses a critical need for experimental determinations of the surface and solution interactions of mixtures of these components in naturally heterogeneous aquifer materials. Three related hypotheses are addressed in this project: The hypotheses are being be tested with co-contaminants and subsoils representative of DOE sites. Target solutes are oxalic acid, EDTA, Co(II)EDTA, and natural humic acid. Batch, mini-column, and conventional column methods will be used and results analyzed with numerical models of coupled chemical transport processes. Project findings will be linked to collaborative intermediate- and field-scale studies. This report outlines the advances that have been accomplished within this first year. In particular, we have made substantial progress in demonstrating that the heterogeneity aquifer materials indeed evolves over time in the presence of dissolution-promoting co-contaminants.
- Research Organization:
- Oregon Graduate Inst. of Science and Technology, Portland, OR (United States). Dept. of Environmental Science and Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG06-89ER60845
- OSTI ID:
- 10188940
- Report Number(s):
- DOE/ER/60845-4; ON: DE95001326; BR: KP0203000
- Resource Relation:
- Other Information: PBD: May 1994
- Country of Publication:
- United States
- Language:
- English
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