The rate of sono-oxidation of KI increased in a CO₂-Ar system compared to Ar alone. Higher values were obtained at 200 kHz with a maximum ratio of about forty. To determine the role of additional CO₂ in the system, the effect of the pH of the reactant solution, the additional effect of NaHCO₃, sonoluminescence, and an analysis of products were examined. It appeared that the pH was not a significant contributor to the acceleration of sono-oxidation activity although the rate depended on the pH. On the other hand, in spite of the alkaline solution, the reaction rate in NaHCO₃-KI solution was higher than that in the solution without NaHCO₃. This behavior was similar to the case of introduction of CO₂, implying the possible evolution of CO₂ from NaHCO₃. Our data suggested that CO₂ reacted with H radicals, which were produced together with OH radicals during sonication and a considerable amount of OH radicals remained. Because OH radicals have strong oxidative power, the level of sono-oxidation activity increases.

与单独的Ar相比，CO ₂ -Ar系统中KI的声氧化速率增加。在200 kHz时可获得更高的值，最大比例约为40。为了确定额外的CO ₂在系统中的作用，检查了反应物溶液的pH值，NaHCO ₃的额外作用，声致发光以及产物分析。尽管速率取决于pH，但看来pH并不是促进声氧化活性的重要因素。另一方面，尽管是碱性溶液，在NaHCO ₃ -KI溶液中的反应速率仍高于没有NaHCO ₃的溶液中的反应速率。此行为类似于引入CO的情况₂，暗示可能从NaHCO ₃放出CO ₂。我们的数据表明，CO ₂与H自由基发生反应，而H自由基在超声处理过程中与OH自由基一起产生，并且残留了大量的OH自由基。因为OH自由基具有很强的氧化能力，所以声音氧化活性的水平会提高。