Inactivation of Bacteria in an Aqueous Environment by a Direct-Current, Cold-Atmospheric-Pressure Air Plasma Microjet

被引：190

作者：

Liu, Fuxiang ^{[1
,2
]}

Sun, Peng ^{[1
]}

Bai, Na ^{[1
,2
]}

Tian, Ye ^{[1
,2
]}

Zhou, Haixia ^{[1
,2
]}

Wei, Shicheng ^{[1
,3
]}

Zhou, Yanheng ^{[1
,3
]}

Zhang, Jue ^{[1
]}

Zhu, Weidong

Becker, Kurt ^{[4
]}

Fang, Jing ^{[1
]}

机构：

[1] Peking Univ, Acad Adv Interdisciplinary Studies, Beijing 100871, Peoples R China

[2] Sichuan Univ, W China Coll Stomatol, Chengdu 610064, Peoples R China

[3] Peking Univ, Sch Stomatol, Beijing 100871, Peoples R China

[4] NYU, Dept Phys, Polytech Inst, New York, NY 10003 USA

来源：

PLASMA PROCESSES AND POLYMERS | 2010年 / 7卷 / 3-4期

关键词：

bacteria; cell membranes; cold plasma; plasma microjets; GLOW;

D O I：

10.1002/ppap.200900070

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 40 degrees 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 produced 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 center dot) on the fatty acid in the cell membranes of the microorganisms in the liquid.

引用

页码：231 / 236

页数：6

共 20 条

[1]

AIKENS J, 1991, J BIOL CHEM, V266, P15091

[2] ACID DISSOCIATION CONSTANT AND DECAY KINETICS OF PERHYDROXYL RADICAL [J].

BEHAR, D ;

CZAPSKI, G ;

RABANI, J ;

DORFMAN, LM ;

SCHWARZ, HA .

JOURNAL OF PHYSICAL CHEMISTRY, 1970, 74 (17) :3209-&

[3] REACTIVITY OF HO2/O-2 RADICALS IN AQUEOUS-SOLUTION [J].

BIELSKI, BHJ ;

CABELLI, DE ;

ARUDI, RL ;

ROSS, AB .

JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA, 1985, 14 (04) :1041-1100

[4]

BLOCK R, 1999, P 30 AMA PLASM DYN L

[5] A MONTE-CARLO ANALYSIS OF AN ELECTRON SWARM IN A NONUNIFORM FIELD - THE CATHODE REGION OF A GLOW-DISCHARGE IN HELIUM [J].

BOEUF, JP ;

MARODE, E .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1982, 15 (11) :2169-2187

[6]

BOEUF JP, 2003, J PHYS D, V36, pR5

[7] Non-thermal plasmas in and in contact with liquids [J].

Bruggeman, Peter ;

Leys, Christophe .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2009, 42 (05)

[8] Characteristics of atmospheric pressure air discharges with a liquid cathode and a metal anode [J].

Bruggeman, Peter ;

Ribezl, Eva ;

Maslani, Alan ;

Degroote, Joris ;

Malesevic, Alexander ;

Rego, Robby ;

Vierendeels, Jan ;

Leys, Christophe .

PLASMA SOURCES SCIENCE & TECHNOLOGY, 2008, 17 (02)

[9] The Interaction of a Direct-Current Cold Atmospheric-Pressure Air Plasma With Bacteria [J].

Feng, Hongqing ;

Sun, Peng ;

Chai, Yufeng ;

Tong, Guohua ;

Zhang, Jue ;

Zhu, Weidong ;

Fang, Jing .

IEEE TRANSACTIONS ON PLASMA SCIENCE, 2009, 37 (01) :121-127

[10] ELECTRON-ENERGY DISTRIBUTIONS IN NEGATIVE GLOW AND THEIR RELEVANCE TO HOLLOW-CATHODE LASERS [J].

GILL, P ;

WEBB, CE .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1977, 10 (03) :299-311

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