[–] 3 points 1 week ago

Not a chemist nor supply chain expert so salt to taste:

Looks like they tried ratios between 1:1 to 4:1 sodium hydroxide to plastic. Wikipedia says in 2022, worldwide production for sodium hydroxide was roughly 83 million tons/year. Plastic waste from a cursory google seems like 350-400 million tons/year.

They do say in the paper that one product of the reaction can be converted back into sodium hydroxide using calcium hydroxide, but I assume you'd then need a fair bit of that.

If you can believe something the Calcium Carbonate Association Europe writes there is a fair bit of wiggle room before we start using more calcium carbonate than is regenerated, but you have burn that to get calcium oxide (to then turn into calcium hydroxide using water), which is very CO2 intensive. According to Wikipedia with a 2007 source, worldwide production of calcium oxide is around 283 million tons/year.

Oh also their experiments were using 0.05g of plastic for each run. Not sure why and whether scaling that would be a problem.

So yeah, like the last paragraph says:

The researchers say further work is needed to optimize the process and evaluate its economic viability before it can be deployed at scale.

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  • [–] 5 points 2 months ago (1 child)

    Steht da was von zu viel? Wenn man den letzten Satz von dem Paragraphen einfach weglässt kann das vllt so wirken.

    Dann vielleicht mit dem Zug? Wer an jenem Wochenende zum Beispiel noch spontan von München nach Verona will, um an den Gardasee zu kommen, zahlt für eine vierköpfige Familie etwa 200 Euro. Ein Flug von München nach Verona und zurück kostet zwischen 300 und 400 Euro – pro Person.

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  • [–] 2 points 5 months ago

    Don't think so. It looks weird, but very consistently. Look at the kerning, the spacing after each "e" is just a little too wide, and all the "e"s have the same little hump at the top.

    I would guess this is a mild anti-dyslexia font or sth like that.

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  •  

    Moin, ich hab in einem meiner Outdoor-Töpfe einen Samen der in einem Baggy lag gepflanzt, der dann ja nicht feminisiert ist. Ist jetzt ca 5 Wochen alt.

    Ich hab den Verdacht dass ich hier eine männliche Pflanze gewürfelt habe, da meine anderen (die aber Autos sind) nicht solche kapselartigen Dinger haben. Bin aber Noob und will die jetzt nicht einfach killen, könntet ihr mir da helfen? Kann man das jetzt überhaupt schon sagen?

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