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TIL about silicate weathering https://en.wikipedia.org/wiki/Carbonate%E2%80%93silicate_cycle https://en.wikipedia.org/wiki/Carbonate%E2%80%93silicate_cyc... si

• prawn 6mo ago
  There are various companies/projects set up around that idea: https://www.lithoscarbon.com/ https://www.lithoscarbon.com/ https://en.wikipedia.org/wiki/Carbfix https://en.wikipedia.org/wiki/Carbfix https://co2crc.com.au/ https://co2crc.com.au/ https://sgeas.unimelb.edu.au/research/carbon-trap-lab https://sgeas.unimelb.edu.au/research/carbon-trap-lab
  • fred_is_fred 6mo ago
    The Lithos Carbon idea is interesting. The mine they show looks like they can just scrape it rather than needing to mine it with explosives. Unfortunately the site's blog has 1 post and it is 3.5 years old. Is it still a going concern?
    • apothegm 6mo ago
      There’s an “in the news” entry on their site from this January (and a skim of the article does find them mentioned), so signs point to yes.
• chris_va 6mo ago
  It's really the alkalinity (e.g. the Mg++ or Ca++), which silicate rocks often have (but technically not limited to silicates). As an aside, we need to dissolve roughly one large mountain into the mix layer (top ~50m) of the ocean to have it fully take up atmospheric CO2. Without dissolving, the reaction is very slow (co2 in atmosphere => slightly lower pH rain => reaction with mostly passivated rock + erosion).
  • russearyus 6mo ago
    [dead]