Abstract: This paper deals with the absorption process with mass transfer of ozone in bubble columns‚which is accom-panied by the self -decomposition of dissolved ozone and the two-stage ozonation reaction between ozone and the organic materials in water‚and with the method to solve the mass transfer parameters‚such as the liquid-phase volumetric mass transfer coefficient．Absorption experiments were carried out at298K‚by injecting ozone into a bubble column which con-tains p-nitroaniline．The mass balance equations of the ozone absorption process were then expressed by using the com-plete mixing model．Furthermore‚the mass balance equations and enhancement factor equations of the absorption process were solved by utilizing the Matlab ODE program‚and the concentration variations of ozone and p-nitroaniline in the ab-sorption process were simulated‚which were then compared with the experiment results．It is conclude that‚in short bubble column‚by means of the complete mixing model it is feasible to describe the flow states of gas phase and liquid phase‚and that the simulation results are consistent with the experimental results before the degradation of80％ of p-nitroaniline．

Key words: ozone, p-nitroaniline, mass transfer, bubble column, simulation