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SURFACTANT ENHANCED SOLUBILIZATION OF RESIDUAL DODECANE IN SOIL COLUMNS 1. MATHEMATICAL MODELING
Citation:
Abriola, L., T. Dekker, AND K. Pennell. SURFACTANT ENHANCED SOLUBILIZATION OF RESIDUAL DODECANE IN SOIL COLUMNS 1. MATHEMATICAL MODELING. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-94/053.
Description:
A mathematical model is developed to describe surfactant enhanced solubilization of nonaqueous phase liquids (NAPLS) in porous media. he model incorporates aqueous phase transport equations for organic and surfactant components as well as a mass balance on the organic phase. ate-limbed solubilization and surfactant sorption are represented by a linear driving force expression and a Langmuir isotherm, respectively. he model is implemented in a one-dimensional Galerkin finite element simulator which idealizes entrapped residual organic as a collection of spherical globules. oil 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. alibrated model simulations exhibit good agreement with measured effluent concentrations, supporting the utility of the conceptual modeling approach. ensitivity analyses explore the influence of surfactant concentration and flushing strategy on NAPL recovery.