Title

Bacteria Inactivation Using Low Power Pulsed Gliding Arc Discharges with Water Spray

Authors

Authors

R. Burlica; R. G. Grim; K. Y. Shih; D. Balkwill;B. R. Locke

Comments

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Abbreviated Journal Title

Plasma Process. Polym.

Keywords

Escherichia coli; hydrogen peroxide generation; plasma sterilization; pulsed plasma discharge; strain; surface; water spray; DIELECTRIC-BARRIER DISCHARGES; ATMOSPHERIC-PRESSURE PLASMA; HYDROGEN-PEROXIDE; ESCHERICHIA-COLI; FENTON REACTION; DNA-DAMAGE; HUMID; AIR; ELECTRICAL DISCHARGES; FLOWING AFTERGLOW; REACTIVE NITROGEN; Physics, Applied; Physics, Fluids & Plasmas; Physics, Condensed Matter; Polymer Science

Abstract

Low temperature atmospheric pressure plasma (produced by a 250 mW pulsed gliding arc discharge) with water spray was utilized to inactivate bacteria colonies of Escherichia coli grown on the surface of an agar substrate. The pH, solution conductivity, H(2)O(2), and nitrate concentrations were determined for air and argon carrier gases and different water flow rates. Control experiments conducted by spraying solutions of H(2)O(2) in the absence of the discharge demonstrated that this chemical and its delivery by spraying account for approximately two to three orders of magnitude (depending upon bacterial loading) of the bacterial colony decontamination process for Discharge Arc both carrier gases when bacteria are allowed to grow on the agar plate to form a biofilm. Reactive species or other factors arising from the gas flow from the plasma with the water spray caused bacteria inactivation of one to two orders of magnitude beyond those of spraying H(2)O(2) alone.

Journal Title

Plasma Processes and Polymers

Volume

7

Issue/Number

8

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

640

Last Page

649

WOS Identifier

WOS:000281430000002

ISSN

1612-8850

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