The decomposition of gaseous toluene as a representative volatile organic compound using 200 kHz ultrasonic waves was investigated as a new air cleaning method that does not require an ultraviolet light source, in accordance with the Minamata Convention on Mercury. Upon applying ultrasonic irradiation to water in a batch reactor, the removal ratio of gaseous toluene above the water reached 91.0% at 10 ppm and 92.7% at 40 ppm. The addition of t-BuOH, a radical scavenger that suppresses ultrasonic decomposition, inhibited the removal of gaseous toluene, indicating that the ultrasonic irradiation not only accelerated the dissolution of toluene into the water but also mediated its decomposition. Further experiments in a flow system revealed that the removal ratio of gaseous toluene decreased with increasing toluene flow rate, whereas the total mass of toluene removed increased, suggesting that sufficient amounts of the active species, such as ^•OH radicals, required for the initial decomposition of toluene were formed in the liquid phase upon ultrasonic irradiation.

根据《水am公约》，使用200 kHz超声波对作为代表性挥发性有机化合物的气态甲苯的分解进行了研究，这是一种不需要紫外线光源的新型空气净化方法。在间歇反应器中对水施加超声辐射后，水上方气态甲苯的去除率在10 ppm时达到91.0％，在40 ppm时达到92.7％。t的加法-BuOH，一种抑制超声波分解的自由基清除剂，抑制了气态甲苯的去除，表明超声波辐射不仅加速了甲苯在水中的溶解，而且还介导了其分解。在流动系统中进行的进一步实验表明，气态甲苯的去除率随甲苯流速的增加而降低，而甲苯的去除总量增加，这表明初始分解需要足够数量的活性物质，例如^• OH自由基在超声辐射下在液相中形成甲苯。