Inactivation characteristics of a 280 nm Deep-UV irradiation dose on aerosolized SARS-CoV-2

Takamure, Kotaro; Iwatani, Yoshinori; Amano, Hiroshi; Yagi, Tetsuya; Uchiyama, Tomomi

doi:10.1016/j.envint.2023.108022

Cited by 4 publications

(1 citation statement)

References 55 publications

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“…Although they suggest further experiments are needed to establish a firm dose–response curve, this measurement would imply a UV susceptibility of > 1.3 m 2 /J. Only a few other studies on the sensitivity of aerosolized SARS-CoV-2 to different UV-C wavelengths (222 nm, 265 nm, and 280 nm) have been published 17 , 18 , 20 , 32 , 33 . For the relatively close wavelength of 265 nm, Ueki et al 18 reported a reduction of 90%, 99% and 99.9% for doses of 2.3 J/m 2 , 4.0 J/m 2 and 10.4 J/m 2 respectively.…”

Section: Introductionmentioning

confidence: 99%

Estimation of the UV susceptibility of aerosolized SARS-CoV-2 to 254 nm irradiation using CFD-based room disinfection simulations

van der Schans,

Yu,

de Vries

et al. 2024

Sci Rep

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The recent COVID-19 pandemic has raised interest in efficient air disinfection solutions. The application of germicidal ultraviolet (GUV) irradiation is an excellent contender to prevent airborne transmission of COVID-19, as well as other existing and future infectious airborne diseases. While GUV has already been proven effective in inactivating SARS-CoV-2, quantitative data on UV susceptibility and dose requirements, needed to predict and optimize the performance of GUV solutions, is still limited. In this study, the UV susceptibility of aerosolized SARS-CoV-2 to 254 nm ultraviolet (UV) irradiation is investigated. This is done by employing 3D computational fluid dynamics based simulations of SARS-CoV-2 inactivation in a test chamber equipped with an upper-room UV-C luminaire and comparing the results to previously published measurements performed in the same test chamber. The UV susceptibility found in this study is (0.6 ± 0.2) m2/J, which is equivalent to a D90 dose between 3 and 6 J/m2. These values are in the same range as previous estimations based on other corona viruses and inactivation data reported in literature.

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Section: Introductionmentioning

confidence: 99%

Estimation of the UV susceptibility of aerosolized SARS-CoV-2 to 254 nm irradiation using CFD-based room disinfection simulations

van der Schans,

Yu,

de Vries

et al. 2024

Sci Rep

View full text Add to dashboard Cite

show abstract

Review of research advances in microbial sterilization technologies and applications in the built environment

Zeng,

Li,

et al. 2024

Journal of Environmental Sciences

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A Review of Recent Research Advances on AlGaN-Based Deep Ultraviolet Light-Emitting Diodes

Huang,

Li,

Xiang

2024

IEEE Access

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Due to environmental friendliness, small size, long lifetime, and adjustable light-emitting wavelength, AlGaN-based deep ultraviolet light-emitting diodes (DUV-LEDs) have great development potential in the fields of biochemical detection, sterilization and disinfection, and non-line-of-sight communication. After decades of research, AlGaN-based DUV-LEDs have significantly improved in the direction of luminous efficiency. However, the luminous efficiency of the present AlGaN-based DUV-LEDs is still at a low level compared with that of the fully commercialised nitride blue LEDs, making it difficult to meet the market demand. This paper first introduces the present development status of AlGaN-based DUV-LEDs and the reasons for the low luminous efficiency. Then from the preparation of AlGaN-based, AlGaN doping and the design of AlGaN-based DUV-LEDs structure to elaborate the research progress in recent years in the direction of improving the luminous efficiency of AlGaN-based DUV-LEDs. Finally discusses the challenges that the AlGaN-based DUV-LEDs are presently faced with, and their future opportunities for development. INDEX TERMS AlGaN-based DUV-LEDs;luminous efficiency;AlGaN-based;AlGaN doping;AlGaNbased DUV-LEDs structure I. INTRODUCTION

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Inactivation characteristics of a 280 nm Deep-UV irradiation dose on aerosolized SARS-CoV-2

Cited by 4 publications

References 55 publications

Estimation of the UV susceptibility of aerosolized SARS-CoV-2 to 254 nm irradiation using CFD-based room disinfection simulations

Estimation of the UV susceptibility of aerosolized SARS-CoV-2 to 254 nm irradiation using CFD-based room disinfection simulations

Review of research advances in microbial sterilization technologies and applications in the built environment

A Review of Recent Research Advances on AlGaN-Based Deep Ultraviolet Light-Emitting Diodes

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