|
Top-level
@dean @libroraptor I also know little about it, but I remember them being part of the #DavosSafe protocols. I've read they're helpful although probably need a more strategic placement. I wonder about the effectiveness of this one lamp just standing in the corner of the room, but I guess it can't be worse than not having it. 9 comments
This might mean combining with one another in the air and creating entirely new chemicals that have very little with their original source chemicals. This might also mean damaging your tissue if you come into contact with them, most likely by inhaling. That smell of freshly baked bread and sweets has a lot of chemicals in it, disassembling those chemicals and re-assembling them in a random way is quite a chemical experiment. On the other hand, fine enough filters (think HEPA) can remove viruses, and a carbon filter after particle filter can also serve as reactant to safely react with reactive chemicals in air and remove free radicals and VOC.  Naomi Wu is a Cantonese Maker who has covered this extensively in a series of very thorough videos. How it works, how it is safely done and how to install, how to do it cheaply. You want a very specific kind of UV light source, 222 nm, https://twitter.com/realsexycyborg/status/1436691276921860099?lang=en, and install it in air ducts or filters to deactivate virus material,  @isotopp @pezmico @dean For the school contexts that I'm thinking about, home-made won't do – it'd have to be a commercially supplied one from the HVAC company. These things have been around for years; what I'm wondering is whether there is an important reason why they're not being promoted while filtration is. @libroraptor @isotopp @pezmico @dean @mmlvx @isotopp @pezmico @dean I didn't think to check Wikipedia before, but it turns out that they have a broad-and-thin, inconclusive, but at least reasonably current, summary https://en.wikipedia.org/wiki/Ultraviolet_germicidal_irradiation#Air_disinfection |
Gregory's Server
@pezmico @dean @libroraptor
UV-C light is pretty high energy light, which breaks down molecules and thus kills off germs.
But breaking down molecules also means it creates free radicals - highly reactive short-lifetime chemical compounds, that seek to react with other things they come into contact with.