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NAL Agricultural Thesaurus
U.S. Department of Agriculture

Concept Breadcrumbs

Research, Technology, Methods > technology > environmental technology > soil vapor extraction
Preferred Term:

soil vapor extraction

Definition:
Soil vapor extraction is an in situ remedial technology that reduces concentrations of volatile constituents in petroleum products adsorbed to soils in the unsaturated (vadose) zone. A vacuum is applied through wells near the source of contamination in the soil. Volatile constituents of the contaminant mass "evaporate" and the vapors are drawn toward extraction wells. Extracted vapor is then treated (commonly with carbon adsorption) before being released to the atmosphere.
Concept Schemes:
NALT Full
Broader Concept:
environmental technology
Related Concepts:
Entry Terms:
  • soil vacuum extraction
  • soil vapour extraction
  • soil venting
URI:
https://lod.nal.usda.gov/nalt/37469
Download this Concept:
RDF/XMLCreated 2006-01-19, last modified 2013-01-18
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