Journal article
Inactivation of Bacteria in Flight by Direct Exposure to Nonthermal Plasma
IEEE transactions on plasma science, v 38(11), pp 3234-3240
Nov 2010
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Plasma treatment is a promising technology for fast and effective sterilization of surfaces, waterflow, and airflow. The treatment of airflow is an important area of healthcare and biodefense that has recently gained the interest of many scientists. In this paper, we describe a dielectric barrier grating discharge (DBGD) which is used to study the inactivation of airborne Escherichia coli inside a closed air circulation system. Earlier published results indicate approximately 5-log reduction (99.999%) in the concentration of the airborne bacteria after single DBGD exposure of 10-s duration. This paper investigates plasma species influencing the inactivation. The two major factors that are studied are the effect of charged and short-lived species (direct exposure to plasma) and the effect of ozone. It is shown that for a 25% reduction in direct exposure, the inactivation falls from 97% to 29% in a single pass through the grating. The influence of ozone was studied by producing ozone remotely with an ozone generator and injecting the same concentration into the system, as that produced by the DBGD plasma. The results show a 10% reduction in the bacterial load after 10-s exposure to ozone; thus, ozone alone may not be one of the major inactivating factors in the plasma.
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Details
- Title
- Inactivation of Bacteria in Flight by Direct Exposure to Nonthermal Plasma
- Creators
- Nachiket D Vaze - A. J. Drexel Plasma Inst., Drexel Univ., Philadelphia, PA, USAMichael J Gallagher - Nat. Energy Technol. Lab., Morgantown, WV, USASin Sin Park - A. J. Drexel Plasma Inst., Drexel Univ., Philadelphia, PA, USAGregory Fridman - A. J. Drexel Plasma Inst., Drexel Univ., Philadelphia, PA, USAVictor N Vasilets - Inst. for Energy Problems of Chem. Phys., Russian Acad. of Sci., Moscow, RussiaAlexander F Gutsol - Chevron Energy Technol. Co., Richmond, CA, USAShivanthi Anandan - Dept. of Biol., Drexel Univ., Philadelphia, PA, USAGary Friedman - A. J. Drexel Plasma Inst., Drexel Univ., Philadelphia, PA, USAAlexander A Fridman - A. J. Drexel Plasma Inst., Drexel Univ., Philadelphia, PA, USA
- Publication Details
- IEEE transactions on plasma science, v 38(11), pp 3234-3240
- Publisher
- IEEE
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000284090500017
- Scopus ID
- 2-s2.0-78349311517
- Other Identifier
- 991014878154004721
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InCites Highlights
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Physics, Fluids & Plasmas