GEOC 51 |
| Edgar Buck, Environmental Technology Division, Pacific Norhwest Laboratory, PO Box 999, MS P7-25, Richland, WA 99352 and Bruce K. McNamara, Radiochemical Processing Group, Pacific Northwest National Laboratory, P.O. Box 999, MSIN P7-22, Richland, WA 99352. |
| Highly hydrophobic micro-crystals of uranyl oxide hydrates that form during laboratory corrosion of uranium oxide (UO2) can become irreversibly attached to air/water or oil/water interfaces. Increasing the ionic strength results in stabilized bubbles coated with a high density of uranyl phase aggregates. The uranyl phase was identified as meta-schoepite produced during alteration of sintered. The spalled uranium phases formed fractal aggregates that were able to occlude particles of the primary solid. Initial studies suggest that the hydrophobic nature of the U(VI) phases could result in retention of these particles at air/water interfaces under unsaturated conditions. |
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Colloid-Facilitated Transport of Contaminants in the Subsurface: The Life and Death of a Colloid
1:00 PM-5:20 PM, Monday, March 29, 2004 Marriott -- Marquis NW, Oral
Division of Geochemistry |