Record Display for the EPA National Library Catalog

RECORD NUMBER: 467 OF 1150

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 ;
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB91-216283 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 11/26/1991
Collation 10p
Abstract
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.)