time：2021-11-26 source：ZJ Lighting Views：151
This is the first study on the disinfection efficiency of UV-LED radiation at different wavelengths or frequencies for viruses in the coronavirus family. Completed by a team led by Professor Hadas Mamane of Tel Aviv University, the article was published in the November 2020 issue of the Journal of Photochemistry and Photobiology.
The research team used the human coronavirus OC43 (HCoV-OC43) as a substitute for SARS-CoV-2 and tested different UV LED bulbs (emitting different wavelengths-in nm) to see which wavelength can effectively kill Live HCoV-OC43 virus.
After exposing the virus suspension in the dark tube to UV LED light, the research team found that the wavelength of 285nm is very effective in inactivating the virus, almost as effective as the wavelength of 265nm, and it can inactivate 99.9% in 30 seconds. Coronavirus.
In addition, other viruses show similar sensitivity to these wavelengths, indicating that this technology can be used to deal with many types of human coronaviruses, including SARS-CoV-2.
The researchers said that these findings are significant because 285nm UV LED lamps can not only disinfect the coronavirus, but are also cheaper and easier to obtain than the 265nm variety.
Since the researchers used HCoV-OC43 instead of SARS-CoV-2, they said that future work will focus on testing the effects of LEDs and their combinations on the virus that can cause new coronary pneumonia to confirm these results.