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A similar idea using olivine: https://www.technologyreview.com/2020/06/22/1004218/how-green-sand-could-capture-billions-of-tons-of-carbon-dioxide/ https://www.t
by faleidel 4y ago
A similar idea using olivine: https://www.technologyreview.com/2020/06/22/1004218/how-green-sand-could-capture-billions-of-tons-of-carbon-dioxide/ https://www.technologyreview.com/2020/06/22/1004218/how-gree...
- bradrn 4y agoThis is pretty much exactly the same idea: the paper referenced by the article mentions basalt specifically, which has olivine as a major constituent.
- xingyzt 4y agoNewer studies have put doubt to olivine's effectiveness: https://www.technologyreview.com/2022/03/30/1048434/why-using-the-oceans-to-suck-up-co2-might-not-be-as-easy-as-hoped/ https://www.technologyreview.com/2022/03/30/1048434/why-usin...
- pfdietz 4y agoThat was about putting olivine in seawater, not spreading it on soil. My concern with all these approaches is the nickel content of olivine, which can be several tenths of a percent.
- ncmncm 4y agoYes, you would favor using the low-nickel supply on farmland. I wonder if nickel in olivine would be harmful on beaches.
- heavyset_go 4y agoHere's a study that found that the olivine hypothesis might not work as expected: https://www.technologyreview.com/2022/03/30/1048434/why-using-the-oceans-to-suck-up-co2-might-not-be-as-easy-as-hoped/ https://www.technologyreview.com/2022/03/30/1048434/why-usin...