液中パルス放電における超音波照射の影響

抄録

Advanced oxidation processes (AOPs) have attracted attention as a wastewater treatment method at present and nonthermal plasma processing using a pulsed discharge has been investigated as a method for degradation organic compounds contained in water. The active species such as a hydroxyl radical produced by electrical discharge play an important role in degrading organic compounds in water. In order to increase a decomposition performance, in this study, decomposition of phenol was carried out using a reactor combined pulsed discharge plasma in water with ultrasound, and ultrasound was indirectly irradiated to the plasma reactor. The discharge electrode was a needle-plate type. As a result of combining pulse discharge in liquid and ultrasound, streamer discharge was generated continuously by cavitation bubble and the phenol removal efficiency was higher than that of simple sum of the removal efficiency by the pulsed discharge and the ultrasound.