Thread by @geoengineering1

🚨NEW study explored a system that combines enhanced olivine weathering (EOW) with increased C fixation by diatoms.

EOW can boost ocean's ability to sequester DIC while stimulating diatom growth, which in turn would fix more C & reinforce biological C pump processes. #CDR

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In this study, researchers investigated the short-term synergistic CO2 removal effects of an olivine–diatom coculture system & found that:

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1️⃣ "Over a 6-day incubation period, the olivine dissolution was 92%–144% higher in the olivine–diatom groups compared with the olivine-only groups."

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2️⃣ "The olivine-only groups achieved a #CDR efficiency of 5.15%–5.49% while the olivine–diatom groups achieved a CDR efficiency of 8.84%–14.44%."

In particular, diatoms in direct contact with olivine showed more pronounced CDR effects than diatoms in indirect contact.

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3️⃣ "Adding olivine was found to increase the total alkalinity by 70–100 µmol L− 1 and the diatom abundance by 26.4%–58.4%."

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4️⃣ "Diatom growth and the fixed carbon content were greatly enhanced, particularly during the later silicate-depleted stage when the Si: C ratio significantly exceeded that of groups without olivine."

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"The olivine–diatom coculture system boosts CO2 removal efficiency and offers an effective carbon sequestration strategy for combating climate change," study concludes.

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Read the study entitled "Synergistic CO2 removal via enhanced olivine weathering and diatom growth in the ocean" here:


#EnhancedWeathering
#Olivine
#CarbonRemoval

🧵8/8 spj.science.org/doi/pdf/10.341…

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