Measurement of reactive species generated by dielectric barrier discharge in direct contact with water in different atmospheres
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2017
Authors
Kovačević, Vesna V.
Dojčinović, Biljana

Jović, Milica
Roglić, Goran

Obradović, Bratislav M.

Kuraica, Milorad M.

Article (Published version)

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The formation of hydroxyl radical and long-living chemical species (H2O2, O-3, NO3- and NO2-) generated in the liquid phase of a water falling film dielectric barrier discharge in dependence on the gas atmosphere (air, nitrogen, oxygen, argon and helium) was studied. The chemical molecular probe dimethyl sulfoxide was employed for quantification of. OH, and the influence of hydroxyl radical scavenging on formation of reactive oxygen and nitrogen species was investigated. In addition to liquid analysis, plasma diagnostics was applied to indicate possible reaction pathways of plasma-liquid interaction. The highest. OH production rate of 1.19 x 10 (5) mol l (1) s (1) was found when water was treated in oxygen, with a yield of 2.75 x 10(-2) molecules of. OH per 100 eV. Formation of hydrogen peroxide in air, nitrogen and argon discharges is determined by recombination reaction of hydroxyl radicals, reaching the highest yield of about 0.7 g kWh(-1) when distilled water was treated in argon d...ischarge. Ozone formation was dominant in oxygen and air discharges. Strong acidification along with formation of reactive nitrogen species was detected in water treated in air and nitrogen discharges.
Keywords:
water falling film DBD / plasma-liquid interaction / non-thermal plasma / hydroxyl radical / plasma chemistrySource:
Journal of Physics D-Applied Physics, 2017, 50, 15Publisher:
- Iop Publishing Ltd, Bristol
Projects:
- Diagnostics and Optimization of Plasma Sources Important for Applications (RS-171034)
- Integrated systems for flue gas cleansing and development of technologies for zero pollution power plants (RS-33022)
- Application of advanced oxidation processes and nanostructured oxide materials for the removal of pollutants from the environment, development and optimisation of instrumental techniques for efficiency monitoring (RS-172030)
- COST Action [TD1208]
DOI: 10.1088/1361-6463/aa5fde
ISSN: 0022-3727