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Characterizing Pore-Scale Configuration of Organic Immiscible Liquid in Multiphase Systems With Synchrotron X-Ray Microtomography

^a Soil, Water and Environmental Science Dep., Univ. of Arizona, 429 Shantz Bldg., Tucson, AZ 85721
^b Hydrology and Water Resources Dep., Univ. of Arizona, 429 Shantz Bldg., Tucson, AZ 85721

View larger version (73K): [in a new window]   Fig. 1. Thin sections in the x–y direction (planar view) of a 45/50-Accusand column for a two-phase system (water–organic liquid). (A) Reconstructed raw image collected above the I K-edge. Organic liquid is white, the aqueous phase is dark gray, and porous-medium grains are light gray. (B) False-color images, created by overlapping the binary images obtained separately for each fluid. Organic liquid is red, the aqueous phase is blue, and porous-medium grains (and unresolved fluid) are light gray.

View larger version (70K): [in a new window]   Fig. 2. Thin sections in the x–y direction (planar view) of a 45/50-Accusand column for a three-phase system (water-air-organic liquid). (a) Reconstructed raw image collected above the I K-edge. Organic liquid is white, the aqueous phase is dark gray, air is black, and porous-medium grains are light gray. (b) False-color images, created by overlapping the binary images obtained separately for each fluid. Organic liquid is red, the aqueous phase is blue, air is black, and porous-medium grains (and unresolved fluid) are light gray.

View larger version (59K): [in a new window]   Fig. 3. Three-dimensional renderings of organic-liquid blobs isolated from the 45/50-Accusand. The top two blobs were isolated from a two-phase system, and the bottom two blobs were collected from a three-phase system. Created with Blob3D (Ketcham, 2005).

View larger version (164K): [in a new window]   Fig. 4. Thin section in the x–y direction (planar view) of a Vinton soil column for a three-phase system (water–air–organic liquid). Reconstructed raw image collected above the I K-edge. Organic liquid is white, air is black, and the aqueous phase and porous-medium grains are gray.

View larger version (13K): [in a new window]   Fig. 5. Cumulative distribution of the number of organic-liquid blobs of a given volume in two and three-phase systems for (a) Vinton soil, (b) 100/140-Accusand, (c) 45/50-Accusand. Solid lines represent the lognormal distribution fit to each data set.

View larger version (17K): [in a new window]   Fig. 6. Volume-normalized surface area versus volume for all organic-liquid blobs: (a) Vinton soil, (b) 100/140-Accusand, (c) 45/50-Accusand. Solid lines represent the surface-area/volume ratio for a perfect sphere of equivalent volume.