Peroxynitrite Post-Discharge Kinetics in Liquids Treated by Gas Phase Plasma Discharges Driven by Nanosecond High Voltage Pulses

0469696 - ÚFP 2017 RIV TR eng A - Abstrakt
Laurita, R. - Gherardi, M. - Colombo, V. - Lukeš, Petr
Peroxynitrite Post-Discharge Kinetics in Liquids Treated by Gas Phase Plasma Discharges Driven by Nanosecond High Voltage Pulses.
Book of Abstracts of COST Action TD1208 International Conference on Electrical Discharges with Liquids. Kocaeli: Kocaeli University, 2016 - (Demir, A.; Veli, E.; Kacar, E.; Pamuk, H.; Süngü, J.). s. 13. ISBN 978-605-9160-20-9.
[International Conference on Electrical Discharges with Liquids (ICEDL 2016). 14.03.2016-17.03.2016, Kocaeli]
Grant CEP: GA MŠMT(CZ) LD14080
Grant ostatní: European Cooperation in Science and Technology(XE) COST TD1208
Institucionální podpora: RVO:61389021
Klíčová slova: Gas Phase Plasma * Peroxynitrite * post-discharge kinetics
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech

The aim of this work is to investigate post-discharge kinetics of peroxynitrite formation in aqueous liquids treated by atmospheric pressure dielectric barrier discharge (DBD) driven by nanosecond pulses. The change of pH and temperature of formed PAW was monitored. The kinetics of NO2 - and H2O2 decay in PAW is investigated. Evolution of nitrites and nitrates concentrations in PAW after plasma treatment have been measured by means of ion chromatography, while H2O2 concentration using the titanium sulfate method. From the kinetics of NO2 - and H2O2 decay, the rates of ONOOH formation in PAW were determined for various acidic pH values. The rate of ONOOH formation increased with [H+] and increased by 4 times when lowering the pH of the solution from 2.9 to 2.3. These findings contribute significantly to the understanding of the chemistry of peroxynitrite formation in air plasma-treated water, i.e. dominant pathway ONOOH formation is through the post-discharge reaction between H2O2 and HNO2.
Trvalý link: http://hdl.handle.net/11104/0267516