"Bipolar ionization could be a secret weapon in the war against COVID-19"
Updated: May 14, 2020
"Bipolar ionization is experiencing a surge in popularity as the coronavirus pandemic fans concerns about air quality.
Integrated into HVAC systems, the technology utilizes specialized tubes that take oxygen molecules from the air and convert them into charged atoms that then cluster around microparticles, surrounding and deactivating harmful substances like airborne mold, bacteria, allergens, and viruses.
They also attach to expelled breath droplets and dust particles that can transport viruses, enlarging them so they're more easily caught in filters. It's an active process that provides continuous disinfection.
"The ions produce a chemical reaction on the cell membrane surface that inactivates the virus," Philip Tierno, a clinical professor of microbiology and pathology at the NYU School of Medicine, told Business Insider. "It can reduce 99.9% of microbes in a matter of minutes."
The battle against the coronavirus could be an air fight
Concerns about airborne transmission have grown as new research indicates the novel coronavirus can remain airborne longer and spread further than previously thought. Some experts now believe that just normal breathing can spread the virus.
"The possibility of aerosolized spread of COVID-19 and the ability of particles to hang in the air for extended periods of time would make the consideration of an active air-cleaning strategy even more prudent," Tierno said.
Long popular in Europe, bipolar ionization first arrived in the US in the 1970s as a tool to control pathogens in food manufacturing. It was effective during the SARS outbreak of 2004, as well as more recent outbreaks of MERS and norovirus and various strains of influenza.
Recent advances have made units cheaper and easier to install and companies are scrambling to test the technology against the coronavirus. According to Tierno, early results have been positive: "Because coronaviruses are enveloped viruses, they are easier to kill compared to naked viruses like noroviruses."
Many large venues already employ bipolar ionization
Hospitals including Johns Hopkins, Children's Hospital Boston and the University of Maryland Medical Center have already embraced the technology..." -from Business Insider, April 8 2020.