Soil Vapor Extraction / Soil Venting: VOC Removal
Visits：3872 Time：2012-6-20
Soil Vapor Extraction (SVE) is a common method of removing VOCs from the vadose, or unsaturated zone, which is the area between the ground surface and the water table. Organic compounds from leaks or other sources migrate slowly through this area, sometimes held up indefinitely by the soil, and if allowed to reach the water table will begin to contaminate groundwater sources. The SVE method passes air through this zone, volatilizing the organic compounds and removing them in the air stream before they reach the water table. As this process transfers the contaminants from the soil or ground being treated to the air used in the stripping process, the air exiting the SVE process may contain unacceptable amounts of VOCs. Activated carbons can be used for VOC removal from SVE vent gas.