You are here:
METHOD FOR MEASURING AIR-IMMISCIBLE LIQUID PARTITION COEFFICIENTS
Citation:
Simon*, M A. AND M. L. Brusseau. METHOD FOR MEASURING AIR-IMMISCIBLE LIQUID PARTITION COEFFICIENTS. M.K. Banks (ed.), JOURNAL OF ENVIRONMENTAL ENGINEERING. American Society of Civil Engineers (ASCE), Reston, VA, 132(1):140-144, (2006).
Impact/Purpose:
Journal Article
Description:
The principal objective of this work was to measure nonaqueous phase liquid-air partition coefficients for various gas tracer compounds. Known amounts of trichloroethene (TCE) and tracer, as neat compounds, were introduced into glass vials and allowed to equilibrate. The TCE and tracer concentration of the headspace was analyzed and the partition coefficient was calculated from a mass balance. The TCE-air partition coefficient, defined as the ratio of the concentration of the tracer in the vapor phase to its concentration in the TCE phase, for gas tracer coupounds perfluorodimethylcyclobutane, perfluoromethylcyclopentane, perfluoromethylcyclohexane, dibromodifluoromethane, and dibromotetrafluoroethane were determined to be 22, 24, 53, 370, and 470 for temperature of 22-28°C. Most of the variability follows from uncertainty with measurements of tracer vapor-phase concentrations, with overall relative percent differences ranging from 8.5 to 25%. This methodology produces results consistent with literature values obtained from column tests, with similar reproducibility.
URLs/Downloads:
Method for Measuring Air-Immiscible Liquid Partition Coefficient
(PDF,
NA pp,
KB,
about PDF)