By the simultaneous stripping of five organic solutes （benzene, carbon tetrachloride, chloroform, 1, 2-dichloroethane, 1, 1, 2-trichloroethane） from water in the same bubble aeration tank, the overall volumetric mass transfer coefficients for each solute were determined at various air flow rates. Using the relationship between the overall volumetric mass transfer coefficient and Henry's law constant, the same volumetric gas-phase and liquid-phase mass transfer coefficients for five organic solutes, respectively, were obtained simultaneously. The volumetric gas- and liquid-phase mass transfer coefficients for organic solutes were then converted, respectively, using the relationships proposed by Mackay et al. : k_GaD_G^0.67 and k_L aD_L^0.5 into (k_Ga)so₂ for sulfur dioxide gas and (k_La)o₂ for oxygen gas at the air-water interface. The converted (k_La)o₂ were found in good agreement with the data of Shah et al., while the converted (k_Ga)so₂ were found to be about twice as small as the data obtained by Botton et al.
A considerable increase in the volumetric gas- and liquid-phase mass transfer coefficients was observed when small amount of sodium carbonate was added onto the bubble areation tank. The increase in the volumetric mass transfer coefficients was considered to result from the decrease in bubble size or increase in interfacial mass transfer area in aqueous sodium carbonate solution.