(2.) Identification of gaseous products in PB-DBD
HNO3, N2, O2, N2O and O3 are produced in the PB-DBD, and the peaks of HNO3 and N2O5 decrease after the sparging by the following reaction:
N2O and O3 do not contribute to produce ROC/RNS in water, since these peaks do not change by the sparging
4. CONCLUSIONS
We investigated ROS/RNS in water after the exposure of a pulsed discharge, a corona discharge and a plasma jet and after off-gas sparging of a PB-DBD
H2O2 and NO2- are produced by the plasma exposure and NO3- is produced by the exposure and the sparging of off-gas HNO3 and N2O5.
The highest production efficiency of H2O2 and NO2- are respectively 1.06 mg/kJ and 0.23 mg/kJ by the pulsed plasma exposure, and that of NO3- is 0.70 mg/kJ by the off-gas sparging of the PB-DBD.