A1 Journal article (refereed)
Decontamination of a surgical mask with UV-C irradiation : analysis of experimental results with optical simulations (2024)
Kiiskinen, T., Mangs, O., Virkajärvi, J., Elsehrawy, F., Salo, S., Miettinen, A., Halme, J., Harlin, A., & Ketoja, J. A. (2024). Decontamination of a surgical mask with UV-C irradiation : analysis of experimental results with optical simulations. Applied Optics, 63(25), 6523-6531. https://doi.org/10.1364/AO.528056
JYU authors or editors
Publication details
All authors or editors: Kiiskinen, Titta; Mangs, Oliver; Virkajärvi, Jussi; Elsehrawy, Farid; Salo, Satu; Miettinen, Arttu; Halme, Janne; Harlin, Ali; Ketoja, Jukka A.
Journal or series: Applied Optics
ISSN: 1559-128X
eISSN: 2155-3165
Publication year: 2024
Publication date: 21/08/2024
Volume: 63
Issue number: 25
Pages range: 6523-6531
Publisher: Optica Publishing Group
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1364/AO.528056
Publication open access: Openly available
Publication channel open access: Partially open access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/96925
Abstract
The suitability of ultraviolet-C (UV-C) irradiation for the decontamination of a surgical face mask was studied by decontamination experiments and carried out using Staphylococcus aureus and MS2 microbes. A moderate dosage level of 0.22J/cm2 achieved within 2 min led to an over 6-log10 reduction in viable microbe contamination of the inner filtering layer. The underlying reason for this effective decontamination of fibers with small external UV-C dosage was explored with ray-tracing optical simulations, supported by optical measurements on reflection and transmission. The model 3D fiber network was constructed from X-ray tomography images of the layered mask structure consisting of polypropylene fibers. Both simulations and optical measurements indicated that UV light was able to penetrate even the deepest material regions. The simulations show that, despite radiation reflection from the outer mask layer, microbes in the actual filtering layer are affected by the radiation with increased probability due to multiple refraction and scattering of UV light from the inner fibers.
Keywords: face shields; disinfection; bacteria; irradiation; ultraviolet radiation; fibres; tomography
Contributing organizations
Ministry reporting: Yes
VIRTA submission year: 2024
Preliminary JUFO rating: 1
- School of Resource Wisdom (University of Jyväskylä JYU) JYU.Wisdom
- Nanoscience Center (Department of Physics PHYS, JYFL) (Faculty of Mathematics and Science) (Department of Chemistry CHEM) (Department of Biological and Environmental Science BIOENV) NSC
- Materials Physics (Department of Physics PHYS, JYFL)