Oxidation and bio-decontamination effects of impulsive discharges in atmospheric air

Research output: Contribution to journalArticle

Abstract

Chemical oxidation and the bactericidal capabilities of non-thermal plasma discharges can be used in different practical applications such as bio-decontamination, sterilisation of medical equipment, waste water treatment, syn-gas treatment and others. In this paper, the oxidation and bio-decontamination effects of impulsive plasma discharges which propagate across a liquid sample/air interface (surface discharges), and through the bulk of a liquid sample (direct discharges), have been investigated. The oxidising capability was analysed by measuring the degree of decolourisation of indigo carmine dye in water solutions. Gram-negative and Gram-positive bacteria, E. coli and S. aureus, respectively, were used as model microorganisms in the investigation of the biocidal effects of plasma discharges. Surface and direct plasma discharges were generated by high-voltage impulses of both polarities, with magnitudes of 20 kV, 24 kV and 28 kV, the chemical oxidation and bio-decontamination capabilities of such discharges have been obtained and analysed. It has been established that the defining factor in the chemical and biological effects of plasma discharges is the normalised delivered charge (dose). The results obtained in this study show that surface discharges have greater bio-decontamination capability as compared with direct transient plasma discharges. Also, it was shown that the decontamination rate of E.coli is more than double than that of S. aureus.
LanguageEnglish
Pages2145-2155
Number of pages11
JournalIEEE Transactions on Plasma Science
Volume44
Issue number10
Early online date24 Jun 2016
DOIs
Publication statusPublished - 31 Oct 2016

Fingerprint

decontamination
Decontamination
Discharge (fluid mechanics)
plasma jets
Plasmas
Oxidation
oxidation
air
Air
Surface discharges
Escherichia coli
medical equipment
Biomedical equipment
waste water
chemical effects
water treatment
biological effects
Liquids
microorganisms
liquids

Keywords

  • non-thermal plasma discharges
  • oxidation
  • bio-decontamination
  • OH-radicals

Cite this

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title = "Oxidation and bio-decontamination effects of impulsive discharges in atmospheric air",
abstract = "Chemical oxidation and the bactericidal capabilities of non-thermal plasma discharges can be used in different practical applications such as bio-decontamination, sterilisation of medical equipment, waste water treatment, syn-gas treatment and others. In this paper, the oxidation and bio-decontamination effects of impulsive plasma discharges which propagate across a liquid sample/air interface (surface discharges), and through the bulk of a liquid sample (direct discharges), have been investigated. The oxidising capability was analysed by measuring the degree of decolourisation of indigo carmine dye in water solutions. Gram-negative and Gram-positive bacteria, E. coli and S. aureus, respectively, were used as model microorganisms in the investigation of the biocidal effects of plasma discharges. Surface and direct plasma discharges were generated by high-voltage impulses of both polarities, with magnitudes of 20 kV, 24 kV and 28 kV, the chemical oxidation and bio-decontamination capabilities of such discharges have been obtained and analysed. It has been established that the defining factor in the chemical and biological effects of plasma discharges is the normalised delivered charge (dose). The results obtained in this study show that surface discharges have greater bio-decontamination capability as compared with direct transient plasma discharges. Also, it was shown that the decontamination rate of E.coli is more than double than that of S. aureus.",
keywords = "non-thermal plasma discharges, oxidation, bio-decontamination, OH-radicals",
author = "Sirui Li and Timoshkin, {Igor V.} and Michelle MacLean and MacGregor, {Scott J.} and Wilson, {Mark P.} and Given, {Martin J.} and Tao Wang and Anderson, {John G.}",
note = "Published as part of a special issue, {"}Pulsed Power Science & Technology{"}. (c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.",
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doi = "10.1109/TPS.2016.2581317",
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T1 - Oxidation and bio-decontamination effects of impulsive discharges in atmospheric air

AU - Li, Sirui

AU - Timoshkin, Igor V.

AU - MacLean, Michelle

AU - MacGregor, Scott J.

AU - Wilson, Mark P.

AU - Given, Martin J.

AU - Wang, Tao

AU - Anderson, John G.

N1 - Published as part of a special issue, "Pulsed Power Science & Technology". (c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

PY - 2016/10/31

Y1 - 2016/10/31

N2 - Chemical oxidation and the bactericidal capabilities of non-thermal plasma discharges can be used in different practical applications such as bio-decontamination, sterilisation of medical equipment, waste water treatment, syn-gas treatment and others. In this paper, the oxidation and bio-decontamination effects of impulsive plasma discharges which propagate across a liquid sample/air interface (surface discharges), and through the bulk of a liquid sample (direct discharges), have been investigated. The oxidising capability was analysed by measuring the degree of decolourisation of indigo carmine dye in water solutions. Gram-negative and Gram-positive bacteria, E. coli and S. aureus, respectively, were used as model microorganisms in the investigation of the biocidal effects of plasma discharges. Surface and direct plasma discharges were generated by high-voltage impulses of both polarities, with magnitudes of 20 kV, 24 kV and 28 kV, the chemical oxidation and bio-decontamination capabilities of such discharges have been obtained and analysed. It has been established that the defining factor in the chemical and biological effects of plasma discharges is the normalised delivered charge (dose). The results obtained in this study show that surface discharges have greater bio-decontamination capability as compared with direct transient plasma discharges. Also, it was shown that the decontamination rate of E.coli is more than double than that of S. aureus.

AB - Chemical oxidation and the bactericidal capabilities of non-thermal plasma discharges can be used in different practical applications such as bio-decontamination, sterilisation of medical equipment, waste water treatment, syn-gas treatment and others. In this paper, the oxidation and bio-decontamination effects of impulsive plasma discharges which propagate across a liquid sample/air interface (surface discharges), and through the bulk of a liquid sample (direct discharges), have been investigated. The oxidising capability was analysed by measuring the degree of decolourisation of indigo carmine dye in water solutions. Gram-negative and Gram-positive bacteria, E. coli and S. aureus, respectively, were used as model microorganisms in the investigation of the biocidal effects of plasma discharges. Surface and direct plasma discharges were generated by high-voltage impulses of both polarities, with magnitudes of 20 kV, 24 kV and 28 kV, the chemical oxidation and bio-decontamination capabilities of such discharges have been obtained and analysed. It has been established that the defining factor in the chemical and biological effects of plasma discharges is the normalised delivered charge (dose). The results obtained in this study show that surface discharges have greater bio-decontamination capability as compared with direct transient plasma discharges. Also, it was shown that the decontamination rate of E.coli is more than double than that of S. aureus.

KW - non-thermal plasma discharges

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KW - bio-decontamination

KW - OH-radicals

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