UV treatment of microorganisms on artificially-contaminated surfaces using excimer and microwave UV lamps

Christofi, N.; Misakyan, M. A.; Matafonova, G.G.; Barkhudarov, E. M.; Batoev, V.B.; Kossyi, I. A.; Sharp, J.

Abstract

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.

Citation

Christofi, N., Misakyan, M. A., Matafonova, G., Barkhudarov, E. M., Batoev, V., Kossyi, I. A., & Sharp, J. (2008). UV treatment of microorganisms on artificially-contaminated surfaces using excimer and microwave UV lamps. Chemosphere, 73(5), 717-722. https://doi.org/10.1016/j.chemosphere.2008.06.059

• Journal Article Type: Article
• Acceptance Date: Jun 27, 2008
• Online Publication Date: Aug 24, 2008
• Publication Date: 2008-10
• Deposit Date: May 24, 2012
• Journal: Chemosphere
• Print ISSN: 0045-6535
• Electronic ISSN: 1879-1298
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 73
• Issue: 5
• Pages: 717-722
• DOI: https://doi.org/10.1016/j.chemosphere.2008.06.059
• Keywords: Microwave UV lamp; Excilamp; Microbial decontamination; Surface disinfection
• Public URL: http://researchrepository.napier.ac.uk/id/eprint/5325
• Publisher URL: http://dx.doi.org/10.1016/j.chemosphere.2008.06.059