222nm UVC LED light can kill coronavirus and harmless to human body?
Since the outbreak of the new coronavirus pneumonia, many forces around the world have invested in research on disinfection and sterilization technology. Research on whether deep ultraviolet rays can kill coronaviruses has also been ongoing, and there have been some studies proving that UVC technology can effectively kill coronaviruses.
Violeds UV LED technology, for example, has been shown to successfully kill 99.9% of the novel coronavirus within 30 seconds. In addition, a germicidal high-power UVC LED lamp released by Atomic Blue, a Texas-based LED company, has been tested by the National Institutes of Health in a high-standard laboratory operation to disinfect N95 masks and steel surfaces, which can eliminate 99.9999% of Novel coronavirus.
Recently, according to foreign media reports, tests conducted by Columbia University in the United States also showed that far-UVC (far-UVC) light can kill coronaviruses on surfaces within minutes.
The report shows that a research team at Columbia University's Radiology Research Center is conducting experiments on far-UVC light. According to the researcher, the far UVC wavelength is 222nm, which is safe for the human body, but can still kill viruses.
David Brenner, head of the research center, said that far UVC with a wavelength of 222nm cannot penetrate the skin surface or the eye, which means that it can be used in closed and crowded spaces with high pollution risks, and has great potential in the current new coronary pneumonia epidemic. Period comes in handy.
Image source: Paixin.com genuine gallery
It is reported that as early as 2013, the Columbia University team began to study the disinfection effect of far-UVC on drug-resistant bacteria. After that, the research team studied the effect of far-UVC on viruses such as influenza virus, and only recently began to turn their attention to the coronavirus.
Brenner said they started experiments three or four weeks ago and have already established that far-UVC light can kill coronaviruses on surfaces within minutes.
Next, the research team plans to test whether the far-UVC lamps can kill viruses suspended in the air, such as those spread when an infected person coughs or sneezes.
At the same time, they will also test to see if the light is harmless to humans. For 40 weeks, the lab exposed mice to far-UVC light, eight hours a day, five days a week, at 20 times the intensity used in humans. After testing the eyes and skin of the mice, the research team found that the mice did not show any abnormal reactions. The experiment will continue for more than 20 weeks.
At present, although the research team has submitted the preliminary results to the journal Nature, the results cannot be fully confirmed by the scientific community until all the remaining steps have been carried out.
In addition, it was reported in April that Japan's Kobe University (Kobe University) and Japanese LED component manufacturer Ushio (Ushio) also proposed that UVC radiation with a wavelength of 222nm is harmless to human skin and eyes.
The research of the two parties found that the sterilization effect of deep ultraviolet light with a wavelength of 222nm and 254nm was equivalent in terms of the ability to eliminate bacteria on the skin. At the same time, after testing on mice, it was also found that UVC light with a wavelength of 222nm did not harm the skin and eyes of mice. produce adverse effects.
In fact, there are still many controversies in the industry about the claims that UVC light can kill coronavirus and that UVC light with a wavelength of 222nm is harmless to the human body. There is a lot of attention from all walks of life, and more and more detailed studies are expected to prove these results. (Compile: LEDinside Janice)
