HR: 0800h
AN: H31A-0365    [Abstracts]
TI: Characterizing Mass Transfer of a Complex Non-aqueous Phase Liquid
AU: * McColl, C M
EM: cmccoll@email.arizona.edu
AF: Department of Soil, Water, and Environmental Science, The University of Arizona 429 Shantz Building, Tucson, AZ 85721 United States
AU: Johnson, G R
EM: gjohnson@pdx.edu
AF: Department of Civil and Environmental Engineering, Portland State University P.O. Box 751, Portland, OR 97207 United States
AU: Brusseau, M L
EM: brusseau@ag.arizona.edu
AF: Department of Soil, Water, and Environmental Science, The University of Arizona 429 Shantz Building, Tucson, AZ 85721 United States
AU: Brusseau, M L
EM: brusseau@ag.arizona.edu
AF: Department of Hydrology and Water Resources, The University of Arizona 429 Shantz Building, Tucson, AZ 85721 United States
AB: A series of laboratory experiments were conducted with a multiple-component, non-aqueous phase liquid (NAPL) collected from the Picillo Farm Superfund Site. Physical property analysis and compositional analysis were performed to provide initial information about the NAPL. Batch experiments were conducted to evaluate equilibrium phase-partitioning behavior. Two sets of air-stripping column studies were conducted to examine the elution behavior, mass-transfer dynamics, and mass recovery of five selected target compounds present in the NAPL mixture. Initial elution behavior of all target components appeared to be ideal, as the initial vapor-phase concentrations were similar to vapor-phase concentrations measured for the batch equilibrium experiment and those estimated using Raoult's law based calculations incorporating NAPL composition data. Air-stripping of columns containing a pool of NAPL and no porous media revealed that removal of 1,2-DCB appeared to be limited by the molecular diffusion of the compound to the NAPL-air interface. Air-stripping of NAPL distributed relatively uniformly as a residual phase within a sandy porous medium exhibited ideal behavior.
DE: 1829 Groundwater hydrology
DE: 1831 Groundwater quality
DE: 1832 Groundwater transport
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting