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

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Environmental Science and Technology; (United States)

DOI:https://doi.org/10.1021/es00048a006· OSTI ID:5168607

Abriola, L M; Dekker, T J; Pennell, K D ^[1]

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1. Univ. of Michigan, Ann Arbor, MI (United States)

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 for 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 the 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. 45 refs., 6 figs., 3 tabs.

• OSTI ID: 5168607
• Journal Information: Environmental Science and Technology; (United States), Journal Name: Environmental Science and Technology; (United States) Vol. 27:12; ISSN 0013-936X; ISSN ESTHAG
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020900* -- Petroleum-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540250 -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
ALKANES
ANALOG SYSTEMS
CALCULATION METHODS
CONTROL
DODECANE
ENVIRONMENTAL EFFECTS
FINITE ELEMENT METHOD
FUNCTIONAL MODELS
GALERKIN-PETROV METHOD
GROUND WATER
HYDROCARBONS
HYDROGEN COMPOUNDS
ITERATIVE METHODS
MASS BALANCE
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
NUMERICAL SOLUTION
ONE-DIMENSIONAL CALCULATIONS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION CONTROL
POROUS MATERIALS
SENSITIVITY ANALYSIS
SIMULATORS
SOILS
SOLUBILITY
SORPTION
SURFACTANTS
WATER