Temperature dependence of infinite dilution activity coefficients in octanol and octanol/water partition coefficients of some volatile halogenated organic compounds
- Univ. of Delaware, Newark, DE (United States)
The study of the fate and transport of volatile halogenated organic compounds in the environment is of interest as these chemicals, many of which have been classified as pollutants, are widely used as industrial solvents and are now appearing in water supplies. Infinite dilution activity coefficients and Henry`s law coefficients have been measured for 11 halogenated C{sub 1} to C{sub 3} compounds in 1-octanol above room temperature using a gas-liquid chromatographic measurement method. Then, using their earlier data for these substances in water and a correlation relating the limiting activity coefficients of a substance in pure water and in pure 1-octanol to their octanol/water partition coefficients, these latter quantities have been computed. One conclusion from these measurements is that the limiting activity coefficients in octanol and the octanol/water partition coefficients of the halogenated compounds studied are only weakly dependent on temperature over the range from 25 to 50 C. Also, from these and their earlier data, have estimated the infinite dilution partial molar excess enthalpies and excess entropies of these compounds in both 1-octanol and water.
- OSTI ID:
- 137004
- Journal Information:
- Journal of Chemical and Engineering Data, Vol. 40, Issue 6; Other Information: PBD: Nov-Dec 1995
- Country of Publication:
- United States
- Language:
- English
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