Technology assessment of soil vapor extraction and air sparging
Air sparging, also called 'in situ air stripping' and 'in situ volatilization' injects air into the saturated zone to strip away volatile organic compounds (VOCs) dissolved in groundwater and adsorbed to soil. These volatile contaminants transfer in a vapor phase to the unsaturated zone where soil vapor extraction (SVE) can then capture and remove them. In addition to removing VOCs via mass transfer, the oxygen in the injected air enhances subsurface biodegradation of contaminants. Air sparging is a relatively new treatment technology. Research efforts have not yet fully elucidated the scientific basis (or limitations) of the system, nor completely defined the associated engineering aspects. However, a substantial body of available information describes the effectiveness and characteristics of air sparging systems. This document summarizes the available literature and addresses case studies of practical air sparging applications. It also identifies needs for further research.
- Research Organization:
- Camp Dresser and McKee, Inc., Cambridge, MA (United States)
- OSTI ID:
- 6830272
- Report Number(s):
- PB-93-100154/XAB; CNN: EPA-68-03-3409
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
AIR
BIODEGRADATION
CAPTURE
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
DIRECT REACTIONS
ELEMENTS
ENGINEERING
EXTRACTION
FLUIDS
GASES
IN-SITU PROCESSING
INJECTION
INTAKE
LAND POLLUTION CONTROL
MASS TRANSFER
NONMETALS
NUCLEAR REACTIONS
ORGANIC COMPOUNDS
OXYGEN
POLLUTION CONTROL
PROCESSING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPARGERS
STRIPPING
TECHNOLOGY ASSESSMENT
TRANSFER REACTIONS
WATER POLLUTION CONTROL