Posted by XzetaU8 2 days ago
Hydroxyl ions are a significant kind of negative ion in the atmosphere and they’re known to be good because they react with and clean out pollutants like methane
https://en.wikipedia.org/wiki/Hydroxyl_radical
https://earthobservatory.nasa.gov/images/144358/detergent-li...
Ozone concentrations as low as 70ppb are hazardous when you're exposed to it for several hours [1]. Estimates for Ozone's olfactory threshold aren't trustworthy, since you go nose-blind to it pretty quickly [2], but it seems like it's probably around 20-40ppb before olfactory fatigue sets in [3,4].
My takeaway is that Ozone generators for rooms/basements/etc are definitely a bad idea. The best-cited olfactory thresholds are all in the same order of magnitude as that 8-hour hazard threshold, and with nose-blindness being a significant factor, you just don't want to mess around with that.
Inside a fridge, though? As long as you don't actually smell any ozone when you open the fridge, and you don't just shove your head in the fridge for hours on end, I'd think you're probably fine.
[1]: https://ozonewatch.gsfc.nasa.gov/facts/SH.html [2]: https://www.ecfr.gov/current/title-21/chapter-I/subchapter-H... [3]: https://www.cabidigitallibrary.org/doi/full/10.5555/19602703... [4]: https://spartanwatertreatment.com/ozone-safety/
https://en.wikipedia.org/wiki/Ion-exchange_membrane
Another, that you might be interested in, but it's more confusing
https://www.fuelcellstore.com/introduction-ion-exchange-memb...
Each ion of salt participates in a different reaction
HA ⇌ H+ + A-
TIL that Hydroxyl ions bind to methane and thereby clean the air?
Air ioniser: https://en.wikipedia.org/wiki/Air_ioniser :
> A 2018 review found that negative air ions are highly effective in removing particulate matter from air. [6]
But the Ozone. Ozone sanitizes and freshens, but is bad for the lungs at high concentrations.
Remember personal care startup Mother Dirt, who briefly flirted with live “ammonia-oxidizing bacteria” as an alternative to soap?
https://www.fastcompany.com/90348480/how-this-bacteria-crawl...
Only half-joking: I really do think people habituate quickly to fragrances and scent norms.
I’m hygenic but I (and the people around me) really do avoid scented personal care products. I really notice when I’m in regions or settings where kids schlump around in clouds of Axe Body Spray or Summer Strawberry Juicy Whatever Mist.
Or when an older person has become so habituated to their own perfume that they’ll tell you with a straight face they’re barely wearing any. Ma’am, I literally followed your scent trail to find you.
I certainly recognize that others’ sensitivities can go the other way, and I apologize for sounding dismissive toward the distress that can cause.
And perhaps we can share a sigh over people we’ve met who like to combine a pungent personal odor along with a pungent concentration of perfume or cologne…
Take care
I am not a researcher, but I have a simple evolutionary theory that soap was invented in the last few thousand years and became a mass-market product after the beginning of industrialization.
If we survived and evolved without the use of something in the last few million years, then why is that thing needed?
Because we didn't. A lot of people died, actually. From germs. Before we knew about Germ Theory.
I see this same type of stuff when people talk about inductions or cesarean sections. "Well humans didn't need that before, so why do we need it now?" No actually... humans did need that before. Half of all infants died. Humans are unbelievably shit at giving birth.
Turns out, humans are bad at a lot of things. We die A LOT less now. Like... so much less that we can't even conceptualize how much less we're dying so then we start questioning if we need soap.
And, as a fun aside, the reason humans are so shit at giving birth is because of evolution. You ever wonder why seemingly ever other mammal is able to give birth and it's super chill but we just roll over and die in shocking numbers? Yeah, turns out evolving to be one two legs has disastrous consequences.