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Main Title Cosolvency of Partially Miscible Organic Solvents on the Solubility of Hydrophobic Organic Chemicals.
Author Pinal, R. ; Rao, P. S. C. ; Lee, L. S. ; Cline., P. V. ;
CORP Author Florida Univ., Gainesville. ;Arizona Univ., Tucson.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1990
Year Published 1990
Report Number EPA-R-814512; EPA/600/J-90/199;
Stock Number PB91-116194
Additional Subjects Solubility ; Polyphenyl compounds ; Organic solvents ; Polarity ; Mixtures ; Contaminants ; Ternary systems ; Water ; Mathematical models ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB91-116194 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 11p
The cosolvency of completely miscible organic solvents (CMOSs) and partially miscible organic solvents (PMOSs) on the solubility of hydrophobic organic chemicals (HOCs) was examined, with an emphasis on PMOSs. Measured solubilities were compared with predictions from the log-linear model and the UNIFAC model. In ternary mixed solvents, nonpolar PMOSs such as toluene and trichloroethylene did not appreciably increase HOC solubility. However, polar PMOSs such as o-cresol and nitrobenzene did significantly enhance HOC solubility. Polar PMOSs have greater cosolvent effect, not because they are stronger solvents, but because they are present in greater concentrations as a result of their higher aqueous solubilities (10,000 mg/L or 1% volume fraction). The cosolvency of CMOSs increases with decreasing solvent polarity, whereas the opposite is true for PMOSs. (Copyright (c) by the American Chemical Society, 1990.)