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RECORD NUMBER: 258 OF 285

OLS Field Name OLS Field Data
Main Title Surfactant-Enhanced Solubilization of Residual Dodecane in Soil Columns. 2. Mathematical Modeling.
Author Abriola, L. M. ; Dekker, T. J. ; Pennell, K. D. ;
CORP Author Michigan Univ., Ann Arbor. Dept. of Civil and Environmental Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK.;Ford Motor Co., Dearborn, MI.
Publisher 1993
Year Published 1993
Report Number EPA-R-818647; EPA/600/J-94/053;
Stock Number PB94-137015
Additional Subjects Surface active substances ; Liquids ; Transport ; Mathematical models ; Sorption ; Soil chemistry ; Polyoxyethylene ; Concentration(Composition) ; Porous materials ; Solubility ; Flushing ; Reprints ; Deodecane ; Soil columns ; Remediation ; Solubilization
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB94-137015 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 05/14/1994
Collation 13p
Abstract
A mathematical model is developed to describe surfactant enhanced solubilization of nonaqueous phase liquids (NAPLs) in porous media. The model incorporates aqueous phase transport equations for organic and surfactant components as well as a mass balance on the organic phase. Rate-limited solubilization and surfactant sorption are represented by a linear driving force expression and a Langmuir isotherm, respectively. The model is implemented in a one-dimensional Galerkin finite element simulator which idealizes entrapped residual organic as a collection of spherical globules. Soil column data for the solubilization of residual dodecane by an aqueous solution of polyoxyethylene (20) sorbitan monooleate are used to evaluate the conceptual model. Input parameters were obtained, where possible, from independent batch experiments. Calibrated model simulations exhibit good agreement with measured effluent concentrations, supporting the utility of the conceptual modeling approach. Sensitivity analyses explore the influence of surfactant concentration and flushing strategy on NAPL recovery.