Surfactant-enhanced solubilization of residual dodecane in soil columns. 2. Mathematical modeling

Technical Report · Fri Jan 01 04:00:00 EST 1993

OSTI ID:5177282

Abriola, L M; Dekker, T J; Pennell, K D

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.

• Research Organization: Michigan Univ., Ann Arbor, MI (United States). Dept. of Civil and Environmental Engineering
• OSTI ID: 5177282
• Report Number(s): PB-94-137015/XAB; CNN: EPA-R-818647
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
MATHEMATICAL MODELS
REMEDIAL ACTION
SOILS
SOLUBILITY