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FIELD TEST OF CYCLODEXTRIN FOR ENHANCED IN-SITU FLUSHING OF MULTIPLE-COMPONENT IMMISCIBLE ORGANIC LIQUID CONTAMINATION: COMPARISON TO WATER FLUSHING
Citation:
McCray, J. E., K. D. Bryan, R. B. Cain, G. R. Johnson, W. J. Blanford, AND M. L. Brusseau. FIELD TEST OF CYCLODEXTRIN FOR ENHANCED IN-SITU FLUSHING OF MULTIPLE-COMPONENT IMMISCIBLE ORGANIC LIQUID CONTAMINATION: COMPARISON TO WATER FLUSHING. Chapter 10, ACS Symposium Series 725, Innovative Subsurface Remediation, Field Testing of Physical, Chemical, and Characterization Technologies. American Chemical Society, Washington, DC, , 136-151, (1999).
Description:
A pilot-scale field experiment was conducted to compare the remediation effectiveness of an enhanced-solubilization technique to that of water flushing for removal of multicomponent nonaqueous-phase organic liquid (NAPL) contaminants form a phreatic aquifer. This innovative remediation technique uses cyclodextrin, a sugar (glucose)-based molecule , to enhance the apparent aqueous solubility of organic contaminants. The cyclodextrin solution significantly increased not only the apparent solubility for several target contaminants, but also the rate of dissolution. As a result of these effects, the time required for cleanup of NAPL contamination at this field site may be greatly reduced by using cyclodextrin-enhanced flushing. For examle, it was estimated that more than 70,000 pore volumes of water flushing would be required to remove the undecane mass that was removed in the 8-pore volume cyclodextrin flush, and for trichloroethene, which exhibited the smallest solubility enhancement, about 350 pore volumes of water flushing would be required.