Measurement and estimation of Henry's law constants of chlorinated ethylenes in aqueous surfactant solutions

Tsutomu Shimotori, William A. Arnold

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Henry's law constants of tetrachloroethylene, trichloroethylene, cis-dichloroethylene, and trans-dichloroethylene in air-aqueous surfactant systems were experimentally determined by the equilibrium partitioning in closed systems method. Polyoxyethylene (10) octylphenol, sodium dodecyl sulfate, and cetyltrimethylammonium bromide were used as surfactants. The effects of temperature and surfactant concentration were investigated, and the results demonstrated that the Henry's law constants increased as temperature was increased and decreased as surfactant concentration was increased. The decrease in the Henry's law constants became obvious above the critical micelle concentration. The effect of surfactant addition on the Henry's law constant was larger for the more hydrophobic species. The micelle-water partitioning coefficients (Kmw) for the chlorinated ethylene-surfactant pairs were estimated from the Henry's law constants. The values of Kmw estimated from the Henry's law constants at high surfactant concentrations had a small standard error. On the basis of the experimental data, equations to estimate Henry's law constants in air-aqueous surfactant systems as a function of temperature and surfactant concentration were constructed. All of the equations estimated the experimental data with R2 values above 0.96.

Original languageEnglish (US)
Pages (from-to)253-261
Number of pages9
JournalJournal of Chemical and Engineering Data
Volume48
Issue number2
DOIs
StatePublished - Mar 1 2003

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