Determination of infinite dilution activity coefficients and 1-octanol/water partition coefficients of volatile organic pollutants
- Univ. of Delaware, Newark, DE (United States). Dept. of Chemical Engineering
The characterization of pollutants is of growing interest as concerns about the environment increase. One parameter useful in predicting the fate of a chemical in the environment, the infinite dilution activity coefficient, has been determined here for several EPA priority pollutants in 1-octanol at 25 C using a relative gas-liquid chromatographic measurement technique. A simple correlation has been developed relating the limiting activity coefficients of a species in pure water and in pure 1-octanol to its octanol/water partition coefficient. Agreement between the experimental results and published values is very good. The method developed here of computing the octanol/water partition coefficient from gas chromatographic measurements of its infinite dilution activity coefficients is an improvement over traditional partition coefficient determination methods in that it is easier and quicker, without a loss of accuracy. Furthermore, the authors show that this method is applicable to chemicals covering a large range of hydrophobicities (1.0 < log K[sub OW] < 5.0).
- OSTI ID:
- 7183176
- Journal Information:
- Journal of Chemical and Engineering Data; (United States), Vol. 39:2; ISSN 0021-9568
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
OCTANOLS
SOLVENT PROPERTIES
ORGANIC HALOGEN COMPOUNDS
SOLUBILITY
CONCENTRATION RATIO
ENVIRONMENTAL TRANSPORT
ORGANIC SOLVENTS
PHASE STUDIES
VAPOR PRESSURE
ALCOHOLS
HYDROXY COMPOUNDS
MASS TRANSFER
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
SOLVENTS
THERMODYNAMIC PROPERTIES
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
540320 - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)