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ENHANCED SOURCE REMOVAL OF NONAQUEOUS PHASE LIQUID CONTAMINANTS BY CHEMICAL-BASED FLOODING
Citation:
Jeong, S. W., A L. Wood*, AND T R. Lee*. ENHANCED SOURCE REMOVAL OF NONAQUEOUS PHASE LIQUID CONTAMINANTS BY CHEMICAL-BASED FLOODING. Presented at Korean Society of Environmental Engineers, Spring Meeting, Seoul, Korea, 5/11-13/2001.
Description:
Nonaqueous phase liquids (NAPLs) such as gasoline and halogenated solvents (trichloroethylene (TCE) and teterachloroethylene (PCE), etc) enter the subsurface after a spill, or from leaking underground storage tanks. The presence of residual dense nonaqueous phase liquids (DNAPL) pose a significant long-term threat to groundwater quality. Because conventional treatment methods such as water flooding have shown little success at removing DNAPLs, chemical-based flooding has been suggested for enhanced contaminant source removal. This study evaluated cosolvent or surfactant flooding with and without concurrent air injection. The study used a glass micromodel to assess DNAPL extraction during flooding (Figure 1). Results of surfactant and surfactant foam floodings were obtained from Jeong et al. (1).