The Air Force's Installation Restoration Program includes an active research program into treatments for contaminated groundwater. Packed-tower air stripping of volatile organic compounds (VOCs) from groundwater has proven to be a costeffective and efficient method of treatment. The Research Triangle Institute (RTI) has recently participated in a packed-tower air-stripping test program for the Air Force in which 16 organic compounds in a groundwater plume were identified, and the air-stripping behavior of each was examined. The performance of four different commercial packing materials was evaluated for each of the 16 contaminants over a range of gas-liquid flow ratios. The mass transfer coefficients for each of the contaminants were subsequently calculated, and the most effective operating conditions were determined.

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