Ultraviolet radiation is a common method of killing bacteria and viruses. Now, researchers from Tel Aviv University have proven that the novel coronavirus, SARS-CoV-2, can be killed efficiently, quickly and cheaply using ultraviolet (UV) light-emitting diodes (UV-LEDs) at specific frequencies.
“We discovered that it is quite simple to kill the coronavirus using LED bulbs that radiate ultraviolet light,” said Prof. Hadas Mamane, head of the Environmental Engineering Program at Tel Aviv University’s School of Mechanical Engineering, who led the study with Prof. Yoram Gerchman and Dr. Michal Mandelboim.
She said that the UV-LED bulbs require less than half a minute to destroy more than 99.9% of the coronaviruses.
The study is the first of its kind in the world. An article about it was published earlier this month in the Journal of Photochemistry and Photobiology B: Biology.The Jerusalem Post has written about Mamane many times. She presented this summer at the Boris Mints Institute 2020 Research Conference on her involvement in the construction of a 30-meter “green wall” at the university, which is meant to create a sustainable ecosystem for waste, energy and water.
The wall is also meant to act as a living laboratory to analyze the uses of greywater (wastewater generated from sinks, showers, baths, and washing machines) in absorbing carbon dioxide, as well as the effects on heat transfer and energy generation within old buildings that are prevalent in urban settings.
At the beginning of the coronavirus crisis, her research team developed an Israeli, low-cost, decentralized, nonpolluting means of producing ethanol – and thereby an alcohol-based hand sanitizer – from plant-based waste, such as municipal and agricultural trim, straw and residual paper fibers.
LEDs are available in a wide range of wavelengths, known as A, B and C, explained Mamane. Read Full Article >