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A Film Depositional Model of Permeability for Mineral Reactions in Unsaturated Media

Pacific Northwest National Lab., P.O. Box 999, MSIN K9-36, Richland, WA 99352

View larger version (20K): [in a new window]   Fig. 1. Sketch depicting how pore radii change with Lf for (a) precipitation and (b) dissolution.

View larger version (15K): [in a new window]   Fig. 2. Permeability reduction profiles for the Mualem and Childs and Collis-George (C & C-G) depositional permeability film models due to calcite precipitation.

View larger version (14K): [in a new window]   Fig. 3. Permeability enhancement profiles for the Mualem and Childs and Collis-George (C & C-G) depositional permeability film models due to quartz dissolution.

View larger version (19K): [in a new window]   Fig. 4. Cumulative mineral film thicknesses for the glass simulation.

View larger version (16K): [in a new window]   Fig. 5. Relative changes in porosity for the glass simulation.

View larger version (22K): [in a new window]   Fig. 6. Mineral reaction rates at 1 wk.

View larger version (21K): [in a new window]   Fig. 7. Glass permeability profiles for (a) the Mualem model and (b) the Childs and Collis-George model.

View larger version (20K): [in a new window]   Fig. 8. van Genuchten profiles for (a) the Mualem model and (b) the Childs and Collis-George model.

View larger version (22K): [in a new window]   Fig. 9. van Genuchten N profiles for (a) the Mualem model and (b) the Childs and Collis-George model.