Generation of Active Oxidant Species by Pulsed Dielectric Barrier Discharge in Water-Air Mixtures

Abstract

Experimental research into the electrical and optical parameters of pulsed dielectric barrier discharge (PDBD) was undertaken. PDBD was applied to humid air containing water droplets as a means of water oxidative treatment with short-living species generated in the discharge zone. In spectral analysis of PDBD, only small concentrations of nitric oxides were detected at the resulting electric field strength and electron mean energy sufficient for generation of OH-radicals. The water droplets served as electric field strength concentrators: PDBD was ignited close to the water droplets' surface.

Keywords:

• Ozone
• Pulsed Dielectric Barrier Discharge
• Wet Ozonation
• Ozone Generation into Air-Water Mixtures
• Nitrogen Oxide Formation
• Drinking Water Treatment

ACKNOWLEDGMENTS

The authors express their gratitude to Dr. Gennadiy Ivanov and Dr. Gennadiy Saveliev (Chair of Inorganic Chemistry, Tomsk Polytechnic University) for help with spectroscopic measurements and valuable discussions, and Dr. Kirill V. Kozlov (Chair of Gas Electrochemistry, Moscow State University) for help with the analysis of the discharge emission spectrum.