HR: 0830h
AN: H21D-0845    [PDF]
TI: Acoustically Enhanced Nonaqueous Phase Liquid Dissolution in Water Saturated Porous Media
AU: * Vogler, E T
EM: vogler@eng.uci.edu
AF: University of California, Department of Civil and Environmental Engineering, Irvine, CA 92697 United States
AU: Chrysikopoulos, C V
EM: costas@eng.uci.edu
AF: University of California, Department of Civil and Environmental Engineering, Irvine, CA 92697 United States
AB: The effects of acoustic waves on the dissolution of dense nonaqueous phase liquids (DNAPLs) in water saturated porous media are investigated in this study. Experiments of trichloroethylene (TCE) ganglia dissolution within a water saturated column, packed with glass beads are conducted. Acoustic waves with pressure amplitudes ranging from 0 to 1625 Pa and frequencies ranging from 0 to 285 Hz are employed to the interstitial fluid at the inlet of the packed column. Effluent dissolved TCE concentrations are observed to increase by over 120% in the presence of acoustic pressure waves compared to the case where TCE dissolution without acoustic waves is monitored. Several peaks in effluent concentrations were observed for specific frequencies that may be attributed to resonant frequencies and/or the presence of standing waves. The observed effluent dissolved TCE concentration increase is attributed to increased mass flux at the TCE-water interface, caused by acoustic waves. The acoustic waves employed were found to be highly attenuated with distance from the acoustic source but may be compensated by greater acoustic source pressure.
DE: 1800 HYDROLOGY
DE: 1829 Groundwater hydrology
DE: 1831 Groundwater quality
DE: 1832 Groundwater transport
SC: Hydrology [H]
MN: 2003 Fall Meeting