HYDRODYNAMIC DRAG EFFECTS ON DEPOSITION AND RE-ENTRAINMENT DYNAMICS OF MICROBES AND NON-BIOLOGICAL COLLOIDS DURING NON-PERTURBED TRANSPORT IN POROUS MEDIA

2005 Salt Lake City Annual Meeting (October 16–19, 2005)
Paper No. 212-7

Presentation Time: 10:00 AM-10:15 AM

HYDRODYNAMIC DRAG EFFECTS ON DEPOSITION AND RE-ENTRAINMENT DYNAMICS OF MICROBES AND NON-BIOLOGICAL COLLOIDS DURING NON-PERTURBED TRANSPORT IN POROUS MEDIA
JOHNSON, William P., LI, Xiqing, and TONG, Meiping, Geology & Geophysics, University of Utah, 135 South 1460 East, Salt Lake City, UT 84112, wjohnson@earth.utah.edu This presentation examines the non-perturbed deposition and re-entrainment dynamics of biological and non-biological colloids in porous media in the presence of an energy barrier to deposition at the grain surface. Deposition and re-entrainment rate coefficients were determined from numerical simulation of breakthrough-elution behavior and the profiles of retained colloids. We present composite trends from original and previously published data for biological and non-biological colloids which demonstrate that hydrodynamic drag mitigates deposition and drives re-entrainment of both biological and non-biological colloids in the presence of an energy barrier under non-perturbed conditions. These results call for the development of colloid transport theories that explicitly account for the influence of the hydrodynamic field at the grain surface.
2005 Salt Lake City Annual Meeting (October 16–19, 2005) General Information for this Meeting

Session No. 212 Nano- To Field-scale Processes Governing the Transport of Microbes and Colloids in the Subsurface I Salt Palace Convention Center: 251 AB 8:00 AM-12:00 PM, Wednesday, 19 October 2005 Geological Society of America Abstracts with Programs, Vol. 37, No. 7, p. 472
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