HR: 10:50h
AN: H42A-03    [Abstracts]
TI: Influence of Media and Fluid Properties on NAPL Residual Geometry and Contaminant Mass Flux
AU: * Totten, C T
EM: ctotten@ufl.edu
AF: Department of Environmental Engineering Sciences, 220 Black Hall, Gainesville, FL 32611 United States
AU: Annable, M D
EM: annable@ufl.edu
AF: Department of Environmental Engineering Sciences, 220 Black Hall, Gainesville, FL 32611 United States
AU: Jawitz, J W
AF: Soil and Water Science Department, 106 Newell Hall, Gainesville, FL 32611 United States
AU: Delfino, J J
AF: Department of Environmental Engineering Sciences, 220 Black Hall, Gainesville, FL 32611 United States
AB: The influence of media and fluid properties on NAPL residual geometry and associated contaminant mass flux characteristics was investigated. Media grain size and NAPL wettability were varied for relative comparisons. Fluid properties including density differential and interfacial tension between NAPL and water were varied for relative comparisons. The percent mass flux of perchloroethylene was measured and the relationship between mass flux and mass loading was developed for different systems. Results indicate wettability conditions of the media as well as density differential between fluids had the greatest influence on contaminant flux values from the NAPL source zone. The results show that as density differential decreased and the media became more hydrophobic, the relationship between percent mass flux and percent mass value changed from logarithmic to linear relationship. Varying grain size had little effect on the magnitude of mass flux values but showed some correlation with the mass flux and mass load relationship. The results indicated that interfacial tension between fluids had minimal effect on mass flux values and a consistent logarithmic relationship between mass flux and mass load was observed.
DE: 1829 Groundwater hydrology
DE: 1831 Groundwater quality
DE: 1832 Groundwater transport
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting