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RECORD NUMBER: 20 OF 39

OLS Field Name OLS Field Data
Main Title Partition Equilibria of Nonionic Organic Compounds between Soil Organic Matter and Water.
Author Chiou, C. T. ; Porter, P. E. ; Schmedding, D. W. ;
CORP Author Oregon State Univ., Corvallis.;Corvallis Environmental Research Lab., OR.
Year Published 1983
Report Number EPA-R-808046; EPA/600/J-83/366;
Stock Number PB88-148135
Additional Subjects Adsorbed water ; Soil physics ; Sorption ; Organic compounds ; Separation ; Solutes ; Solubility ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB88-148135 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 7p
Abstract
Equilibrium isotherms for the simultaneous uptake of binary nonionic organic compounds from water on soil indicated no competitive effect between the two solutes. The observation supports the hypothesis that partition to the soil organic phase is the primary process for sorption of nonionic organic compounds from water on soil. The partition process between soil organic matter and water was analyzed by using the conventional solution concept for solutes in water and the Flory-Huggins treatment for solutes in the polymeric humic phase. Sorption determined for 12 aromatic compounds on a Woodburn soil shows that the extent of solute insolubility in water (S) is the primary factor affecting the soil organic matter --water partition coefficient (Kom) and that the effect of solute incompatibility with soil organic matter is significant but secondary. This explains the commonly observed correlations of log Kom vs log S and log Kom vs log Kow (octanol-water). (Copyright (c) 1983 by the American Chemical Society.)