UV treatment of microorganisms on contaminated surfaces using excilamps and Microwave UV lamps.

Christofi, Nicholas, Misakyan, M A, Matafonova, Galina, Barkhudarov, E M, Batoev, Valeriy, Kossyi, I A and Sharp, John (2008) UV treatment of microorganisms on contaminated surfaces using excilamps and Microwave UV lamps. Chemosphere, 73 (5). pp. 717-722. ISSN 0045 6535

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An XeBr excilamp having a peak emission at 283 nm, and microwave UV lamps with peak emissions at
253.7 nm that also generate ozone, have been tested for ability to eradicate high populations of microbial
vegetative cells and spores (of bacteria and fungi) artificially added to filter surfaces. The study examined
the energy required to completely eradicate large populations on filter surfaces. It was found that both
the excilamp and microwave UV lamps were effective at killing large populations on surfaces with killing
efficiency dependant on the type of organism, and, whether present in its vegetative or spore forms. The
main killing factor is UV radiation following short treatment times. It is considered that for longer irradiation
periods that are required to facilitate complete destruction of surface microorganisms, ozone and
other oxidising species produced by microwave UV lamps would act to enhance microbial destruction.

Item Type: Article
Print ISSN: 0045 6535
Electronic ISSN: 1879-1298
Uncontrolled Keywords: Microwave UV lamp; Excilamp; Microbial decontamination; Surface disinfection;
University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment
Dewey Decimal Subjects: 500 Science > 540 Chemistry > 543 Analytical chemistry
600 Technology > 600 Technology > 602 Miscellany
Library of Congress Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Item ID: 5325
Depositing User: Prof. John Sharp
Date Deposited: 24 May 2012 15:08
Last Modified: 12 Feb 2013 13:46

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