Investigations of air and DNAPL entry and migration in large saturated columns of fractured shale saprolite
- Univ. of Tennessee, Knoxville, TN (United States)
Dense nonaqueous phase liquids (DNAPLs) are often detected at hazardous waste sites, and are among the most common hazardous chemicals found in groundwater. When released to the soil, DNAPLs enter the subsurface as a continuous fluid phase because of their low solubility in water. During migration in either granular or fractured soil or rock, a discontinuous liquid residual or pools of continuous phase can form which will slowly dissolve in flowing groundwater and create a health hazard that can persist for decades. Estimating or predicting the extent and distribution of DNAPL residuals and pools are critical steps in designing measures to clean-up or control the spread of contamination. To date, most investigations of DNAPL migration have been conducted in granular materials. The initial entry and final distributions or residual and pools is quite different in fractured materials however, and few studies have been conducted in fractured materials, even though there are many sites where DNAPL contamination has occurred in fractured soil and rock.
- OSTI ID:
- 569918
- Report Number(s):
- CONF-971116--
- Country of Publication:
- United States
- Language:
- English
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