91–100 of 141 posts
How much gold and palladium are required? Those are massively expensive catalysts and it feels borderline disingenuous to talk about how this will bring clean drinking water to the masses without so much as mentioning cost.
Probably nobody knows. It's research; it's not a technology or product in development.
Oh dear. After reading the notes in the study itself about the scale this was done at, scaling up might be an issue: > A typical H₂O₂ synthesis reaction was carried out using 120 mg of 1% AuPd/TiO₂ [...] The reactor system was then pressurized, typically to 10 bar. The reactor was then cooled by a water bath to 2 °C. When the reactor had reached the required pressure and the flow through the system had stabilized, th…
Thanks for the insights, though let's remember that research is just a first step. This isn't a product being announced for the market. If we looked at the original research behind a lot of mature technology, we'd find the state of the technology to be similarly far from from production. Now others can try to reproduce it, refine it, find other methods of producing the same reactive oxygen species, find substitutes t…
The press release makes bold implications tbh
Earlier quoted context omitted.
Thanks for the insights, though let's remember that research is just a first step. This isn't a product being announced for the market. If we looked at the original research behind a lot of mature technology, we'd find the state of the technology to be similarly far from from production. Now others can try to reproduce it, refine it, find other methods of producing the same reactive oxygen species, find substitutes t…
> This isn't a product being announced for the market. The press release makes bold implications tbh
Anytime you read things like 100,000,000 times more effective - you should be asking, what was the numerator or denominator in this. Or are they just describing some tiny part of the system. For example, normally you need to filter, do settling for sediment etc - how did they solve all this? Given the orders of magnitude involved here a 5 MGD plant could produce 500 trillion gallons per day of "commercial approach" w…
If I've understood correctly, the denominator being compared against isn't a "best available alternative" treatment solution of H2O2. It's against the concentration that's an " equivalent amount "-- which is actually a pretty dilute concentration (for H2O2), that *isn't* effectively bactericidal. > "...are over 10^7 times more potent than an equivalent amount of preformed hydrogen peroxide..." Per fig. 2(c,d), the "c…
This is actually my point exactly. This may not be 100,000,000x better in a practical sense. It is maybe 60x better but because they are doing math with something that is a zero (or close too it) they get to report an insane increase in effectiveness.
It's actually a great tell for what is often garbage analysis when you have this level of a multiple.
Earlier quoted context omitted.
If I've understood correctly, the denominator being compared against isn't a "best available alternative" treatment solution of H2O2. It's against the concentration that's an " equivalent amount "-- which is actually a pretty dilute concentration (for H2O2), that *isn't* effectively bactericidal. > "...are over 10^7 times more potent than an equivalent amount of preformed hydrogen peroxide..." Per fig. 2(c,d), the "c…
> The team showed that as the catalyst brought the hydrogen and oxygen together to form hydrogen peroxide, it simultaneously produced a number of highly reactive compounds, known as reactive oxygen species (ROS), which the team demonstrated were responsible for the antibacterial and antiviral effect, and not the hydrogen peroxide itself. > The catalyst-based method was shown to be 10,000,000 times more potent at kill…
If you are into camping you might be thinking of things like Giardia - much harder to kill.
What if it didn’t evaporate so it was oceans only — is the plot about mankind living without fish suppers or is there more to it? The oceans effectively become poisonous to humans too of course. Any city with brackish tidal rivers becomes affected. Does the disinfectant work immediately — do salmon carry it up river? Salmon ladders get blown up by desperate citizens who inadvertently destroy the dams to which the ladders are attached etc.
I like hard scifi plots. I am not suggesting this is an actual risk. Time to re-read some classics.
Oh dear. After reading the notes in the study itself about the scale this was done at, scaling up might be an issue: > A typical H₂O₂ synthesis reaction was carried out using 120 mg of 1% AuPd/TiO₂ [...] The reactor system was then pressurized, typically to 10 bar. The reactor was then cooled by a water bath to 2 °C. When the reactor had reached the required pressure and the flow through the system had stabilized, th…
$190 million -> 190 bucks ;)
Seriously though, couldn't they just use far less catalyst and not have to deal with the prices you've calculated?
Oh dear. After reading the notes in the study itself about the scale this was done at, scaling up might be an issue: > A typical H₂O₂ synthesis reaction was carried out using 120 mg of 1% AuPd/TiO₂ [...] The reactor system was then pressurized, typically to 10 bar. The reactor was then cooled by a water bath to 2 °C. When the reactor had reached the required pressure and the flow through the system had stabilized, th…
If its effectiveness is as good as they say, seems like you could just use 1,000,000x less catalyst and end up with something as effective as current technology. $190 million -> 190 bucks ;) Seriously though, couldn't they just use far less catalyst and not have to deal with the prices you've calculated?
(Your strategy might totally work of course, just might not be a given)
Earlier quoted context omitted.
"millions of times more effective at killing viruses and bacteria than traditional commercial methods.." "..revolutionise water disinfection technologies" I don't think this is comparable to a water treatment plant. No sediment settling, biofiltration etc. It's comparable to sterilising water using hydrogen peroxide or boiling it, in a camping context. Not sure what the "millions of times" measures.
I'm curious how well it does with dirty water, one of the big issues in the camping context is sediment in the water ruin the efficacy of all forms of water treatment.