Kinetics for the synergistic oxidation of sulfite containing solution by ozone and oxygen was studied in this work. A model including the macro oxidation of sulfite solution, the gas–liquid mass transfer of ozone and oxygen, and chemical reaction in the liquid phase was developed and established. The model considered the following variables: sulfite concentration, partial pressure of ozone or oxygen, pH of the sulfite solution, ionic strength of the medium, reaction temperature, and residence time. For the oxidation processes, mass transfer of oxygen was found to be the rate-determining step as the transfer of ozone and chemical transformation was found to proceed rapidly. In addition, the simulation results for the oxidation rates obtained from this model via comparison of the experimental results with the predicted values were found to be acceptable. The developed kinetic model is beneficial for further understanding of the oxidation mechanism of sulfite solution.

本文研究了臭氧和氧气协同氧化亚硫酸盐溶液的动力学。建立并建立了一个模型，该模型包括亚硫酸盐溶液的宏观氧化，臭氧和氧气的气液传质以及液相中的化学反应。该模型考虑了以下变量：亚硫酸盐浓度，臭氧或氧气的分压，亚硫酸盐溶液的pH，介质的离子强度，反应温度和停留时间。对于氧化过程，发现氧气的质量转移是决定速率的步骤，因为发现臭氧的转移和化学转化迅速进行。此外，通过将实验结果与预测值进行比较，从该模型获得的氧化速率的模拟结果被认为是可以接受的。建立的动力学模型有利于进一步了解亚硫酸盐溶液的氧化机理。