Soil clean up by in-situ aeration. 6. Effects of variable permeabilities

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399108050463· OSTI ID:6059002

Gomez-Lahoz, C; Rodriguez-Maroto, J M ^[1]; Wilson, D J ^[2]

---

1. Univ. de Malaga (Spain)
2. Vanderbilt Univ., Nashville, TN (United States)

Soil vapor stripping (vacuum extraction) has become an important tool in the remediation of hazardous waste sites contaminated with volatile organic compounds (VOCs) in the vadose zone. A mathematical model for in-situ soil vapor stripping is developed and used to examine the effects of a spatially variable pneumatic permeability tensor on the rate of clean-up of a site contaminated with volatile organic compounds. Runs are made with low-permeability clay lenses placed at various locations in the domain of interest; also the effect of soil moisture distribution on the soil gas flow field is examined. The model permits one to carry out a sensitivity analysis of the effects of heterogeneity in the permeability, and to develop strategies for minimizing the damaging effects of domains of low permeability.

• OSTI ID: 6059002
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 26:2; ISSN 0149-6395; ISSN SSTED
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540250* -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
CLEANING
DATA
EQUATIONS
EVAPORATION
FLUID FLOW
GAS FLOW
HAZARDOUS MATERIALS
IN-SITU PROCESSING
INFORMATION
LAND RECLAMATION
MATERIALS
MATHEMATICAL MODELS
MATTER
MOISTURE
ORGANIC COMPOUNDS
PERMEABILITY
PHASE TRANSFORMATIONS
PROCESSING
SENSITIVITY ANALYSIS
SOILS
VACUUM EVAPORATION
VOLATILE MATTER