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MICROSCOPIC OBSERVATION AND QUANTIFICATION OF ENHANCED DNAPL REMOVAL BY COSOLVENT-AIR FLOODING
Citation:
Jeong, S. W., A L. Wood*, AND T R. Lee*. MICROSCOPIC OBSERVATION AND QUANTIFICATION OF ENHANCED DNAPL REMOVAL BY COSOLVENT-AIR FLOODING. 222nd ACS National Meeting, Chicago, IL, 8/26-30/2001.
Description:
The simultaneous injection of cosolvent and air has been suggested to improve sweep efficiency of cosolvent flooding for dense nonaqueous phase liquid (DNAPL) remediation. Glass micromodel experiments were conducted to investigate the factors that influence perchloroethylene (PCE) removal by cosolvent-air (CA) flooding. Two types of glass micromodels were prepared by etching regular flow and random flow patterns into glass. This study quantified real-time changes in PCE saturation from the micromodels. Role of co-injection of air, the relative importance of PCE solubility to PCE displacement during CA flooding, and flow pattern effects in CA flooding systems were investigated by microscopic observation and quantification.