MEASURING VAPOR-LIQUID-EQUILIBRIUM FOR AQUEOUS-ORGANIC SYSTEMS - REVIEW AND A NEW TECHNIQUE

The vapor-liquid equilibrium (VLE) of aqueous-organic mixtures is impo rtant in understanding the physical chemistry behind the contamination and remediation of contaminated surface water; ground water and unsat urated soils. The state of the science is assessed, and available VLE and solubility data are reviewed comprehensively for several organic c ompounds. Benzene, toluene, o-, m-, p-xylene, ethylbenzene, chloroform , 1,1,1-trichloroethane (TCA), and trichloroethylene (TCE) were includ ed in this study. Correlations are provided for estimation of VLE as a function of temperature. A new VLE apparatus was developed to extend experimental techniques found in the literature. Partitioning data for several aqueous-organic systems were measured. The collected data com pared very favorably to data available in the literature. The new proc edure is capable of providing high-qualify data over a wide range of l iquid concentrations and temperatures.