Soil clean up by in-situ aeration. V. Vapor stripping from fractured bedrock
- Vanderbilt Univ., Nashville, TN (USA)
A mathematical model for soil vapor stripping is presented which permits one to model vapor stripping from porous fractured bedrock, where one cannot make the assumption of local equilibrium between the stationary condensed phase and the moving vapor phase with respect to contaminant transport. Models for lab column operation and field operation of a vapor stripping well are presented. A lumped parameter approach is used to handle the kinetics of diffusion of the volatile contaminant from the interiors of the pieces of bedrock out to the moving soil gas. A method for estimating the time constant for this diffusion transport is presented, and the effects of the time constant on the performance of vapor stripping operations are assessed. The effects of impermeable circular caps on vapor stripping wells with and without passive vent wells are examined.
- OSTI ID:
- 6165798
- Journal Information:
- Separation Science and Technology; (USA), Journal Name: Separation Science and Technology; (USA) Vol. 25:3; ISSN SSTED; ISSN 0149-6395
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540250 -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
AERATION
CALCULATION METHODS
CHEMISTRY
CLEANING
FLUIDS
GASES
HAZARDOUS MATERIALS
MATERIALS
MATHEMATICAL MODELS
ORGANIC COMPOUNDS
SOIL CHEMISTRY
SOILS
VAPORS
WASTE-ROCK INTERACTIONS