Bacteria Inactivation Using DBD Plasma Jet in Atmospheric Pressure Argon

被引：0

作者：

Xu Guimin ^{[1
]}

Zhang Guanjun ^{[1
]}

Shi Xingmin ^{[2
]}

Ma Yue ^{[1
]}

Wang Ning ^{[1
]}

Li Yuan ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China

[2] Xi An Jiao Tong Univ, Sch Med, Educ Minist, Environm & Genes Related Dis Key Lab, Xian 710061, Peoples R China

来源：

PLASMA SCIENCE & TECHNOLOGY | 2009年 / 11卷 / 01期

基金：

芬兰科学院;

关键词：

dielectric barrier discharge (DBD); atmospheric pressure glow-like discharge (APGLD); plasma jet; non-thermal plasma; inactivation; bacteria; BACILLUS-SUBTILIS SPORES; LOW-TEMPERATURE PLASMA; STERILIZATION; DECONTAMINATION; DEACTIVATION; MECHANISMS;

D O I：

暂无

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A coaxial dielectric barrier discharge plasma jet was designed, which can be operated in atmospheric pressure argon under an intermediate frequency sinusoidal resonant power supply, and an atmospheric pressure glow-like discharge was achieved. Two kinds of typical bacteria, i.e., the Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli), were employed to study the bacterial inactivation mechanism by means of the non-thermal plasma. The killing log value (KLV) of S. aureus reached up to 5.38 with a treatment time of 90 s and that of E. coli up to 5.36 with 60 s, respectively. According to the argon emission spectra of the plasma jet and the scanning electron microscope (SEM) images of the two bacteria before and after the plasma treatment, it is concluded that the reactive species in the argon plasma played a major role in the bacterial inactivation, while the heat, electric. field and UV photons had little effect.

引用

页码：83 / 88

页数：6

共 17 条

[1]

Atlas R M, 1995, MOSBY YB

[2] Mechanisms of bacterial spore deactivation using ambient pressure nonthermal discharges [J].