抄録
In this study, atmospheric pressure low temperature plasma was generated by using a high voltage pulse power supply (1 – 10 kV, 20 kHz) under the water. Helium gas and oxygen gas were flow into between parallel flat electrodes with glass plates to produce a dielectric barrier glow discharge. Using this plasma, the formaldehyde solution was decomposed. The decomposition rate of formaldehyde was up to about 33% when treated for 6 hours, with underwater plasma generated under the conditions of applied voltage: 10 kV, He gas flow rate: 80 sccm, O₂ gas flow rate: 15 sccm.
