Abstract
Since sodium percarbonate (SPC) contains three molecules of hydrogen peroxide (H2O2), we used it as a source of OH radicals in this study. Decomposition experiments of toluene gas on SPC were performed using UV irradiation and ultrasonication. Experimental results showed that the toluene concentration decreased slightly by the reaction with SPC under UV irradiation. On the other hand, when the ultrasonication was applied to the SPC, the toluene concentration decreased faster and reached about 30% of removal ratio after 120 minutes. It was suggested that ultrasonic irradiation was transmitted inside the SPC solid and its energy contributed to the generation and dissolution of H2O2. By using UV irradiation and ultrasonication at a constant temperature condition of 80℃, the highest removal ratio of about 70% after 120 min was obtained. These results suggested that effective use of ultrasonication could achieve effective VOC gas decomposition on SPC.
