Record Display for the EPA National Library Catalog


Main Title Cosolvency and Sorption of Hydrophobic Organic Chemicals.
Author Rao, P. S. C. ; Lee, L. S. ; Pinal., R. ;
CORP Author Florida Univ., Gainesville.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1990
Year Published 1990
Report Number EPA-R-814512; EPA/600/J-90/201;
Stock Number PB91-116178
Additional Subjects Sorption ; Aromatic compounds ; Solubility ; Soils ; Water ; Mixtures ; Polarity ; Ternary systems ; Organic solvents ; Mathematical models ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB91-116178 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10p
Sorption of hydrophobic organic chemicals (HOCs) by two soils was measured from mixed solvents containing water plus completely miscible organic solvents (CMOSs) and partially miscible organic solvents (PMOSs). The utility of the log-linear cosolvency model for predicting HOC sorption from solvent mixtures was evaluated. Co-solvent effects of PMOSs on HOC solubility and sorption were compared. Nonpolar PMOSs (such as toluene, p-xylene, and TGE) have low aqueous solubilities and when present either as a cosolvent/cosolute in the aqueous phase or as a separate liquid phase do not significantly influence HOC sorption by soils. In contrast, polar PMOSs (such as nitrobenzene and o-cresol) have sufficiently high aqueous solubilities that significant decreases in HOC sorption can be measured. The presence of a CMOS increases the PMOS solubility which in turn, is reflected in increased solubility and decreased sorption of HOCs. (Copyright (c) by the American Chemical Society, 1990.)