Coupling Between Flow and Precipitation In Heterogeneous Subsurface Environments and Effects on Contaminant Fate and Transport (Project no. 99272)
Conference
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OSTI ID:894496
This project is aimed at understanding how contaminant transport in heterogeneous porous media is impacted by precipitation and dissolution events through chemical interactions with precipitates and as a consequence of coupling between precipitation and flow. We hypothesize that precipitation/coprecipitation, encapsulation, isolation from flow and alteration of reactive surfaces will contribute to altering contaminant mobility during precipitation events, and that predicting the release of contaminants during precipitate dissolution requires an understanding of how precipitates are distributed and how contaminants are released from the different compartments over time. Using calcium carbonate as a model system, physical experiments and modeling at the pore-scale and continuum-scale will be used to improve the conceptual approach to predicting the impact of flow-precipitation coupling on solute migration. Column and 2-dimensional intermediate-scale experiments with constructed physical and chemical heterogeneities will be used to investigate the movement of fluids and reactive solutes during different types of mixing events that lead to calcium carbonate supersaturation and precipitation. Smoothed particle hydrodynamic modeling will be used to simulate pore-scale mixing and precipitation in heterogeneous porous media and estimate continuum-scale parameters. Continuum-scale modeling will be used to test conceptual models and associated effective parameters that simulate the macroscopic behavior of the experimental domains.
- Research Organization:
- Idaho National Engineering and Environmental Laboratory (INEEL), Idaho Falls, ID; Pacific Northwest National Laboratory (PNNL), Richland, WA; University of Idaho, Idaho Falls, ID; US Geological Survey; Argonne National Laboratory (ANL), Argonne, IL
- Sponsoring Organization:
- USDOE - Office of Science (SC)
- OSTI ID:
- 894496
- Report Number(s):
- CONF-ERSP2006-26
- Country of Publication:
- United States
- Language:
- English
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