Volume 10, Issue 2 (June 2025)
J Environ Health Sustain Dev 2025, 10(2): 2480-2482 |
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Ethics code: IR.MARAGHEHPHC.REC.1399.010
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Behnami A, Aghayani E, Abdolahnejad A, Raeghi S, Pourakbar M. Investigating the Effect of Different Wavelengths of UV Radiation in Disinfection of Airborne and Surface SARS-Cov-2. J Environ Health Sustain Dev 2025; 10 (2) :2480-2482
URL: http://jehsd.ssu.ac.ir/article-1-904-en.html
URL: http://jehsd.ssu.ac.ir/article-1-904-en.html
Department of Environmental Health Engineering, Maragheh University of Medical Sciences, Maragheh, Iran & Health and Environment Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
Abstract: (34 Views)
Introduction: The COVID-19 pandemic, caused by SARS-CoV- 2 has caused the use of reliable and effective disinfection methods, such as ultraviolet (UV) radiation. There are significant gaps in the literature regarding the effectiveness of various UV wavelengths and their performance on different surfaces for viral RNA destruction.
Materials and Methods: This study evaluated the efficacy of UVA, UVB, and UVC radiation in inactivating SARS-CoV-2 in contaminated air streams and on various surfaces. The experiment measured the cycle threshold (Ct) values of viral RNA under different UV exposure times and airflow rates.
Results: UVC radiation achieved complete viral RNA destruction after 5 min at an airflow rate of 1 L/min, significantly outperforming UVA and UVB. Higher airflow rates reduced the efficacy of UVA and UVB, but UVC remained highly effective, showing significant viral reduction even at 6 L/min airflow. On surfaces, UVC exposure increased Ct values over time, indicating reduced viral RNA, with rapid effects on paper and glass, and longer times required for cloth and iron. These results align with those of existing studies, confirming UVC's superior antiviral properties of UVC.
Conclusion: These findings emphasize the importance of selecting the appropriate UV wavelength and optimizing exposure conditions for effective disinfection. UVC, owing to its high energy and short wavelength, is ideal for rapid and thorough viral inactivation, making it suitable for air and surface disinfection in healthcare and public spaces. Tailored disinfection protocols based on these insights can help mitigate the airborne transmission of SARS-CoV-2 and enhance public health safety. In conclusion, UVC radiation is the most effective UV wavelength for SARS-CoV-2 inactivation, offering significant advantages for disinfection of both air and surfaces. Future strategies should leverage UVC's high efficacy of UVC and optimize the exposure conditions to maximize viral inactivation.
Materials and Methods: This study evaluated the efficacy of UVA, UVB, and UVC radiation in inactivating SARS-CoV-2 in contaminated air streams and on various surfaces. The experiment measured the cycle threshold (Ct) values of viral RNA under different UV exposure times and airflow rates.
Results: UVC radiation achieved complete viral RNA destruction after 5 min at an airflow rate of 1 L/min, significantly outperforming UVA and UVB. Higher airflow rates reduced the efficacy of UVA and UVB, but UVC remained highly effective, showing significant viral reduction even at 6 L/min airflow. On surfaces, UVC exposure increased Ct values over time, indicating reduced viral RNA, with rapid effects on paper and glass, and longer times required for cloth and iron. These results align with those of existing studies, confirming UVC's superior antiviral properties of UVC.
Conclusion: These findings emphasize the importance of selecting the appropriate UV wavelength and optimizing exposure conditions for effective disinfection. UVC, owing to its high energy and short wavelength, is ideal for rapid and thorough viral inactivation, making it suitable for air and surface disinfection in healthcare and public spaces. Tailored disinfection protocols based on these insights can help mitigate the airborne transmission of SARS-CoV-2 and enhance public health safety. In conclusion, UVC radiation is the most effective UV wavelength for SARS-CoV-2 inactivation, offering significant advantages for disinfection of both air and surfaces. Future strategies should leverage UVC's high efficacy of UVC and optimize the exposure conditions to maximize viral inactivation.
Type of Study: Original articles |
Subject:
Environmental Health, Sciences, and Engineering
Received: 2025/04/1 | Accepted: 2022/04/22 | Published: 2025/06/9
Received: 2025/04/1 | Accepted: 2022/04/22 | Published: 2025/06/9
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