Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Influence of Organic Cosolvents on the Sorption Kinetics of Hydrophobic Organic Chemicals.
Author Brusseau, M. L. ; Wood, A. L. ; Rao, P. S. C. ;
CORP Author Robert S. Kerr Environmental Research Lab., Ada, OK. ;Florida Univ., Gainesville. Dept. of Soil Science. ;Arizona Univ., Tucson. Dept. of Soil and Water Science.
Publisher c1991
Year Published 1991
Report Number EPA/600/J-91/136;
Stock Number PB91-216283
Additional Subjects Soil science ; Sorption ; Organic solvents ; Mathematical models ; Environmental research ; Kinetics ; Organic matter ; Environmental transport ; Herbicides ; Land pollution ; Diffusion ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB91-216283 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 11/26/1991
Collation 10p
A quantitative examination of the kinetics of sorption of hydrophobic organic chemicals by soils from mixed solvents reveals that the reverse sorption rate constant k(sub 2) increases log-linearly with increasing volume fraction of organic cosolvent f(sub c). The relationship was expected, based on the existence of a log-log inverse relationship between k(sub 2) and the equilibrium sorption constant K(sub p), and a log-linear inverse relationship between K(sub p) and f(sub c). These results are interpreted in terms of a conceptual model wherein sorption kinetics is controlled by diffusion of sorbate within the matrix of sorbent organic matter. Decreased polarity of the mixed solvent, caused by the addition of a cosolvent, appears to influence the conformation of the polymeric organic matter and, hence, the rate of sorbate diffusion. (Copyright (c) 1991 by the American Chemical Society.)