Dielectric-Barrier-Discharge Excilamp in Mixtures of Krypton and Molecular Chlorine

Rahmani, B.; Bhosle, Sounil; Zissis, Georges

doi:10.1109/tps.2009.2013864

Cited by 15 publications

(5 citation statements)

References 13 publications

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“…We used a bank of three excimer lamps containing a Kr-Cl gas mixture that predominantly emits at 222 nm 25 , 26 . The exit window of each lamp was covered with a custom bandpass filter designed to remove all but the dominant emission wavelength as previously described 15 .…”

Section: Methodsmentioning

confidence: 99%

Far-UVC light: A new tool to control the spread of airborne-mediated microbial diseases

Welch

Buonanno

Grilj

et al. 2018

Sci Rep

311

198

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Airborne-mediated microbial diseases such as influenza and tuberculosis represent major public health challenges. A direct approach to prevent airborne transmission is inactivation of airborne pathogens, and the airborne antimicrobial potential of UVC ultraviolet light has long been established; however, its widespread use in public settings is limited because conventional UVC light sources are both carcinogenic and cataractogenic. By contrast, we have previously shown that far-UVC light (207–222 nm) efficiently inactivates bacteria without harm to exposed mammalian skin. This is because, due to its strong absorbance in biological materials, far-UVC light cannot penetrate even the outer (non living) layers of human skin or eye; however, because bacteria and viruses are of micrometer or smaller dimensions, far-UVC can penetrate and inactivate them. We show for the first time that far-UVC efficiently inactivates airborne aerosolized viruses, with a very low dose of 2 mJ/cm2 of 222-nm light inactivating >95% of aerosolized H1N1 influenza virus. Continuous very low dose-rate far-UVC light in indoor public locations is a promising, safe and inexpensive tool to reduce the spread of airborne-mediated microbial diseases.

show abstract

Section: Methodsmentioning

confidence: 99%

Far-UVC light: A new tool to control the spread of airborne-mediated microbial diseases

Welch

Buonanno

Grilj

et al. 2018

Sci Rep

311

198

View full text Add to dashboard Cite

show abstract

“…We used a bank of three excimer lamps containing a Kr-Cl gas mixture that predominantly emits at 222 nm 26,27 . The exit window of each lamp was covered with a custom bandpass filter designed to remove all but the dominant emission wavelength as previously described 15 .…”

Section: Methodsmentioning

confidence: 99%

Far-UVC light: A new tool to control the spread of airborne-mediated microbial diseases

Welch

Grilj

Shuryak

et al. 2017

Preprint

110

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“…Used for over a hundred years, UVGI-based disinfection traditionally relies on cancer-causing 254 nm UVC light thereby rendering it incompatible for use around people. Fortuitously, recent advances in UV lamp technology, in particular excimer lamps [6][7][8] and light-emitting diodes [9][10][11] , now permit narrow bandwidth, short wavelength UVC (207-222 nm) to be generated. As these far-UVC wavelengths cannot penetrate either the human stratum corneum or ocular tear layer 12 , they are not carcinogenic or cataractogenic [13][14][15][16][17] and can therefore be safely used in people-facing applications 18 .…”

Section: Predicting Airborne Coronavirus Inactivation By Far-uvc In Pmentioning

confidence: 99%

Predicting airborne coronavirus inactivation by far-UVC in populated rooms using a high-fidelity coupled radiation-CFD model

Buchan

Yang

Atkinson

2020

Sci Rep

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There are increased risks of contracting COVID-19 in hospitals and long-term care facilities, particularly for vulnerable groups. In these environments aerosolised coronavirus released through breathing increases the chance of spreading the disease. To reduce aerosol transmissions, the use of low dose far-UVC lighting to disinfect in-room air has been proposed. Unlike typical UVC, which has been used to kill microorganisms for decades but is carcinogenic and cataractogenic, recent evidence has shown that far-UVC is safe to use around humans. A high-fidelity, fully-coupled radiation transport and fluid dynamics model has been developed to quantify disinfection rates within a typical ventilated room. The model shows that disinfection rates are increased by a further 50-85% when using far-UVC within currently recommended exposure levels compared to the room’s ventilation alone. With these magnitudes of reduction, far-UVC lighting could be employed to mitigate SARS-CoV-2 transmission before the onset of future waves, or the start of winter when risks of infection are higher. This is particularly significant in poorly-ventilated spaces where other means of reduction are not practical, in addition social distancing can be reduced without increasing the risk.

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Dielectric-Barrier-Discharge Excilamp in Mixtures of Krypton and Molecular Chlorine

Cited by 15 publications

References 13 publications

Far-UVC light: A new tool to control the spread of airborne-mediated microbial diseases

Far-UVC light: A new tool to control the spread of airborne-mediated microbial diseases

Far-UVC light: A new tool to control the spread of airborne-mediated microbial diseases

Predicting airborne coronavirus inactivation by far-UVC in populated rooms using a high-fidelity coupled radiation-CFD model

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