The absorption Of SO2 from an SO2/air mixture into tap water was measured under pulsed corona discharge at 22 degreesC and 1 atm as a continuation of the previous study(3) in which an SO2/N-2 Mixture and deionized distilled water were used. The mass-transfer enhancement in the gas phase showed almost the same trend as that obtained from the previous study. However, compared to the previous study, the effect of mass-transfer enhancement due to the higher alkalinity in the liquid phase was attenuated as the corona power increased.