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Effects of pulse frequency of input power on the physical and chemical properties of pulsed streamer discharge plasmas in water
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SYSNO ASEP 0421971 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effects of pulse frequency of input power on the physical and chemical properties of pulsed streamer discharge plasmas in water Author(s) Ruma, Ruma. (JP)
Lukeš, Petr (UFP-V) RID, ORCID
Aoki, N. (JP)
Doležalová, Eva (UFP-V) RID
Hosseini, S.H.R. (JP)
Sakugawa, T. (JP)
Akiyama, H. (JP)Source Title Journal of Physics D-Applied Physics. - : Institute of Physics Publishing - ISSN 0022-3727
Roč. 46, č. 12 (2013), s. 125202-125202Number of pages 10 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords discharge in water ; pulsed power ; pulse frequency ; hydrogen peroxide ; organic dye ; bacteria ; generator ; liquids Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects GD104/09/H080 GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 UT WOS 000315413600016 EID SCOPUS 84874528034 DOI 10.1088/0022-3727/46/12/125202 Annotation Positive high-voltage pulses of 20 kV with repetition rates of up to 1 kHz were used to generate discharge in water using point-to-plane electrode geometry.By varying the pulse repetition rate, two distinct modes of discharge plasma were formed in water. The first was characterized by the formation of corona-like discharge propagating through the water in the form of streamer channels.The second mode was formed typically above 500 Hz, when the formation of streamer channels in water was suppressed and all plasma occurred inside a spheroidal aggregate of very fine gas bubbles surrounding the tip of the high-voltage electrode.The production of H2O2, degradation of organic dye Acid Orange 7, and inactivation of bacteria E. coli by the discharge were determined under different plasma modes in dependence with the pulse repetition rate.The efficiency of both chemical and biocidal processes induced by plasma in water decreased significantly using pulse repetition rates above 500 Hz. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2014
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