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RECORD NUMBER: 3 OF 7

OLS Field Name OLS Field Data
Main Title Nonequilibrium Sorption during Displacement of Hydrophobic Organic Chemicals and (45)Ca through Soil Columns with Aqueous and Mixed Solvents.
Author Nkedi-Kizza, P. ; Brusseau, M. L. ; Rao, P. S. C. ; Hornsby., A. G. ;
CORP Author Florida Univ., Gainesville. Dept. of Soil Science.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1989
Year Published 1989
Report Number EPA-R-811144; EPA/600/J-89/183;
Stock Number PB90-140906
Additional Subjects Soil chemistry ; Organic compounds ; Solvents ; Water pollution ; Herbicides ; Calcium ; Cations ; Transport properties ; Diffusion ; Experimental design ; Numerical analysis ; Mass transfer ; Reaction kinetics ; Reprints ; Environmental transport ; Land pollution
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB90-140906 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/15/1990
Collation 8p
Abstract
A series of miscible displacement experiments was conducted to investigate the significance of intraorganic matter diffusion as the rate-limiting step in sorption of organic and inorganic solutes during steady water flow in soil columns. Displacement studies were performed using Eustis surface soil and the same soil treated with hydrogen peroxide to reduce soil organic carbon content from 0.2% to <0.01%. Two herbicides (diuron and atrazine) were also displaced with binary solvent mixtures containing varying fractions of methanol and water (0-50% methanol). A bi-continuum nonequilibrium sorption model was used to simulate the measured effluent breakthrough curves obtained by simultaneous displacement of a nonadsorbed tracer (tritiated water), an organic solute (herbicide), and a metal cation ((45)Ca). (Copyright (c) 1989 American Chemical Society.)