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4698488 
Journal Article 
Treatment of chloro-hydrocarbon contaminated groundwater by air stripping 
Li, K; Chang, SW; Yu, CC 
2000 
293-300 
WOS:000167101900038 
has other version or edition 660231 Treatment of Chlorohydrocarbon Contaminated Ground Water by Air Stripping
Air stripping of chloro-hydrocarbon contaminated groundwater was studied by using a 5-foot by 4-inch I.D. glass column packed with 12.7 mm Raschig ceramic rings. The contaminated groundwater was simulated by using a local residential well water spiked with six chloro-hydrocarbons: trichlorothylene (TCE), dichloro-methane (DCM), 1,2-dichloroethylene (DCE), 1,2-dichloroethane (DCA), chlorobenzene (Cl-Bz), and 2-dichloroethyl ether (DCEE). Experimental results indicated that all the six chemicals could be removed easily from the groundwater by air stripping except DCEE. The measured over-all mass transfer coefficients were found in good agreement with those model predictions except for DCEE, at which the Sherwood's predictions were significantly higher. In general, water flowrate affects the value of over-all mass transfer coefficient more than the other factors. However, for the low-volatile chemical such as DCEE, the air flowrate effect was found to be significant. In order to remove DCEE efficiently, high air-water loading ratio has to be utilized. At this high air flowrate the cooling effect could be significant. An air stripping system of multiple columns set up in series could be more effective than a single column for the removal of DCEE.