Soil clean up by in-situ aeration. IX. Diffusion constants of volatile organics and removal of underlying liquid

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

DOI:https://doi.org/10.1080/01496399108050543· OSTI ID:5624154

Osejo, R E; Wilson, D J ^[1]

---

1. Vanderbilt Univ., Nashville, TN (United States)

The removal of volatile organic compounds (VOCs) underlying the vadose zone in a pool of nonaqueous phase liquid (NAPL) in the vicinity of a soil vapor stripping well is modeled mathematically. The diffusivity of the VOC is an important parameter determining the rate of removal of the NAPL; diffusivities of hexane, toluene, trichloroethylene, tetrachloroethylene, and 1,1,1-trichloroethane were determined in fine sand and found to be approximately 2 {times} 10{sup {minus}6} m{sup {minus}2}/s at 25C. Vapor stripping appears to be a practical method for the removal of NAPL floating on the water table or confined there by capillary pressure, as indicated by mathematical modeling and by bench-scale soil vapor stripping experiments. 64 refs.

• OSTI ID: 5624154
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 26:12; ISSN 0149-6395; ISSN SSTED
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
AERATION
ALKANES
ALKYLATED AROMATICS
AROMATICS
CHLORINATED ALIPHATIC HYDROCARBONS
CLEANING
DECONTAMINATION
DIFFUSION
EQUATIONS
HALOGENATED ALIPHATIC HYDROCARBONS
HAZARDOUS MATERIALS
HEXANE
HYDROCARBONS
IN-SITU PROCESSING
LAND RECLAMATION
LAWS
MATERIALS
MATHEMATICAL MODELS
MATTER
MOISTURE
NONAQUEOUS SOLVENTS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLLUTION LAWS
POROSITY
PROCESSING
REMOVAL
SAND
SOILS
SOLVENTS
TOLUENE
US SUPERFUND
VOLATILE MATTER