Inactivation of bacteria in an aqueous environment by a direct-current, cold-atmospheric-pressure air plasma microjet

Fuxiang Liu, Peng Sun, Na Bai, Ye Tian, Haixia Zhou, Shicheng Wei, Yanheng Zhou, Jue Zhang, Weidong Zhu, Kurt Becker, Jing Fang

Research output: Contribution to journalArticle

Abstract

(Figure Presented) A direct-current, cold-atmospheric-pressure air plasma microjet (PMJ) sustained in a quasi-steady gas cavity in a liquid medium is used to inactivate Staphylococcus aureus (S. aureus) suspended in the liquid. The temperature and the pH value of the liquid change to steady-state values of about 400°C and 3.0-4.5, respectively, after 10 min of plasma treatment. The decrease in the pH is attributed to the reaction of NOx pro-duced in the air plasma with water at the gas-liquid interface. The concentrations of NO3 - and NO2 - are measured to be 37 mg.L-1 and 21 mg • L-1, respectively, after a 20 min of plasma treatment. Effective inactivation of S. aureus is found to start after the pH values decreases to about 4.5. This is attributed to the high oxidizing potential of the perhydroxyl radical (HOO) on the fatty acid in the cell membranes of the microor-ganisms in the liquid.

Original languageEnglish (US)
Pages (from-to)231-236
Number of pages6
JournalPlasma Processes and Polymers
Volume7
Issue number3-4
DOIs
StatePublished - Mar 22 2010

Fingerprint

deactivation
bacteria
Atmospheric pressure
Bacteria
atmospheric pressure
direct current
Plasmas
air
Liquids
liquids
Air
staphylococcus
Gases
fatty acids
Cell membranes
Fatty acids
gases
Fatty Acids
cavities
Water

Keywords

  • Bacteria
  • Cell membranes
  • Cold plasma
  • Plasma microjets

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Polymers and Plastics

Cite this

Inactivation of bacteria in an aqueous environment by a direct-current, cold-atmospheric-pressure air plasma microjet. / Liu, Fuxiang; Sun, Peng; Bai, Na; Tian, Ye; Zhou, Haixia; Wei, Shicheng; Zhou, Yanheng; Zhang, Jue; Zhu, Weidong; Becker, Kurt; Fang, Jing.

In: Plasma Processes and Polymers, Vol. 7, No. 3-4, 22.03.2010, p. 231-236.

Research output: Contribution to journalArticle

Liu, Fuxiang ; Sun, Peng ; Bai, Na ; Tian, Ye ; Zhou, Haixia ; Wei, Shicheng ; Zhou, Yanheng ; Zhang, Jue ; Zhu, Weidong ; Becker, Kurt ; Fang, Jing. / Inactivation of bacteria in an aqueous environment by a direct-current, cold-atmospheric-pressure air plasma microjet. In: Plasma Processes and Polymers. 2010 ; Vol. 7, No. 3-4. pp. 231-236.
@article{132479e245c0429288d7e2b556500251,
title = "Inactivation of bacteria in an aqueous environment by a direct-current, cold-atmospheric-pressure air plasma microjet",
abstract = "(Figure Presented) A direct-current, cold-atmospheric-pressure air plasma microjet (PMJ) sustained in a quasi-steady gas cavity in a liquid medium is used to inactivate Staphylococcus aureus (S. aureus) suspended in the liquid. The temperature and the pH value of the liquid change to steady-state values of about 400°C and 3.0-4.5, respectively, after 10 min of plasma treatment. The decrease in the pH is attributed to the reaction of NOx pro-duced in the air plasma with water at the gas-liquid interface. The concentrations of NO3 - and NO2 - are measured to be 37 mg.L-1 and 21 mg • L-1, respectively, after a 20 min of plasma treatment. Effective inactivation of S. aureus is found to start after the pH values decreases to about 4.5. This is attributed to the high oxidizing potential of the perhydroxyl radical (HOO) on the fatty acid in the cell membranes of the microor-ganisms in the liquid.",
keywords = "Bacteria, Cell membranes, Cold plasma, Plasma microjets",
author = "Fuxiang Liu and Peng Sun and Na Bai and Ye Tian and Haixia Zhou and Shicheng Wei and Yanheng Zhou and Jue Zhang and Weidong Zhu and Kurt Becker and Jing Fang",
year = "2010",
month = "3",
day = "22",
doi = "10.1002/ppap.200900070",
language = "English (US)",
volume = "7",
pages = "231--236",
journal = "Plasma Processes and Polymers",
issn = "1612-8850",
publisher = "Wiley-VCH Verlag",
number = "3-4",

}

TY - JOUR

T1 - Inactivation of bacteria in an aqueous environment by a direct-current, cold-atmospheric-pressure air plasma microjet

AU - Liu, Fuxiang

AU - Sun, Peng

AU - Bai, Na

AU - Tian, Ye

AU - Zhou, Haixia

AU - Wei, Shicheng

AU - Zhou, Yanheng

AU - Zhang, Jue

AU - Zhu, Weidong

AU - Becker, Kurt

AU - Fang, Jing

PY - 2010/3/22

Y1 - 2010/3/22

N2 - (Figure Presented) A direct-current, cold-atmospheric-pressure air plasma microjet (PMJ) sustained in a quasi-steady gas cavity in a liquid medium is used to inactivate Staphylococcus aureus (S. aureus) suspended in the liquid. The temperature and the pH value of the liquid change to steady-state values of about 400°C and 3.0-4.5, respectively, after 10 min of plasma treatment. The decrease in the pH is attributed to the reaction of NOx pro-duced in the air plasma with water at the gas-liquid interface. The concentrations of NO3 - and NO2 - are measured to be 37 mg.L-1 and 21 mg • L-1, respectively, after a 20 min of plasma treatment. Effective inactivation of S. aureus is found to start after the pH values decreases to about 4.5. This is attributed to the high oxidizing potential of the perhydroxyl radical (HOO) on the fatty acid in the cell membranes of the microor-ganisms in the liquid.

AB - (Figure Presented) A direct-current, cold-atmospheric-pressure air plasma microjet (PMJ) sustained in a quasi-steady gas cavity in a liquid medium is used to inactivate Staphylococcus aureus (S. aureus) suspended in the liquid. The temperature and the pH value of the liquid change to steady-state values of about 400°C and 3.0-4.5, respectively, after 10 min of plasma treatment. The decrease in the pH is attributed to the reaction of NOx pro-duced in the air plasma with water at the gas-liquid interface. The concentrations of NO3 - and NO2 - are measured to be 37 mg.L-1 and 21 mg • L-1, respectively, after a 20 min of plasma treatment. Effective inactivation of S. aureus is found to start after the pH values decreases to about 4.5. This is attributed to the high oxidizing potential of the perhydroxyl radical (HOO) on the fatty acid in the cell membranes of the microor-ganisms in the liquid.

KW - Bacteria

KW - Cell membranes

KW - Cold plasma

KW - Plasma microjets

UR - http://www.scopus.com/inward/record.url?scp=77950192922&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77950192922&partnerID=8YFLogxK

U2 - 10.1002/ppap.200900070

DO - 10.1002/ppap.200900070

M3 - Article

VL - 7

SP - 231

EP - 236

JO - Plasma Processes and Polymers

JF - Plasma Processes and Polymers

SN - 1612-8850

IS - 3-4

ER -