Diffusion Coefficients of SO2in Water and Partition Coefficients of SO2in Water–Air Interface at Different Temperature and pH Values

Reversed flow gas chromatography was applied to measure the diffusion coefficient of SO2 in water, the partition coefficient of SO2 in air–water interface, and the rate constant, k R, for chemical reaction between SO2 and water at various temperature and pH values. A linear increment of the diffusion coefficients of SO2 in water with temperature is drawn while the partition coefficients are decreased when temperature increases. Additionally, for each temperature, the diffusion coefficients passed through a maximum as pH increases. Finally, k R is slightly increased with pH and, for the same pH values, k R is higher at lower temperatures.