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Jun 10 7 tweets 3 min read Twitter logo Read on Twitter
🚨NEW STUDY🚨

🌊 For the first time researchers used “lab and wind-wave tank experiments to prove the concept of using Mg(OH)2 for the #OceanAlkalinityEnhancement and #CarbonDioxideRemoval approach (OAE-CDR).” 

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🌊 Experiment results showed “up to 370 μmol kg−1 seawater total alkalinity (TA) increase without precipitation, stable enhanced TA, and OAE-CDR efficiency (ΔDIC/ΔTA) consistent with theoretical calculation.”
2/7
🌊 Based on the experimental results, scientists involved in this study calculated “the global Mg(OH)2 OAE-CDR efficiency and #CO2Sink from this approach.”
3/7
🌊 Results suggested that, “the efficiency is in favor of lower initial DIC to titration alkalinity (TA) ratio, lower temperature, and higher atmospheric CO2, and therefore is the lowest at the equator (0.7–0.8) and increases with latitude (1.0–1.2 above 70 N/S).”
4/7
🌊 However, “factoring in the ocean's surface area, low latitude regions can #absorb more atmospheric CO2.”
5/7
🌊 Researchers' team “conservatively estimate that 44. 4 × 109 ton of CO2 (~ 3.3 times of current annual #CO2Sink in the ocean) could be removed from the atmosphere with 175 μmol kg−1 Mg(OH)2 (equivalent to 350 μmol kg−1 of TA) added to the top 10 m of the ocean.”
6/7
📖🌊Read the paper entitled “Seawater alkalinity enhancement with magnesium hydroxide and its implication for carbon dioxide removal” here ⬇️
sciencedirect.com/science/articl…

#OceanAlkalinityEnhancement
#CarbonDioxideRemoval
#MagnesiumHydroxide

7/7 Image

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More from @geoengineering1

Jun 11
📝💡 𝐖𝐞𝐞𝐤𝐥𝐲 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝
Here's your roundup of top #CarbonDioxideRemoval News / Scientific Papers from the past week:
🌱🪨🎛️🌊

🧵1/11

📜 Scroll down ⬇️ Image
1️⃣ @CharmIndustrial, which removes carbon from the atmosphere via bio-oil sequestration, has raised $100 million in a Series B funding round. It has also signed new record-breaking arrangements for 140,000 tons/CDR with Frontier & JPMorgan.
📰➡️
2/11
2️⃣ Carbon Removal Marketplace @nori announces the appointment of Matt Trudeau as CEO and a $6.25M funding round led by @M13Company, @Toyota_Ventures, @placeholdervc, and @Cargill, bringing total funding to $17.25M.
📰➡️
3/11
Read 11 tweets
Jun 11
🚨📝NEW PAPER📝🚨

In a recently published paper, researchers use “an LCA approach to calculate the Long-Lasting #CarbonSequestration (LLCS) of #seaweed, which can be understood as the difference between #CarbonFixation & released C throughout the life cycle of seaweed.”

🧵1/9 ImageImage
Using kelp (Laminaria japonica) as an example of seaweed, the present study “validates the procedure of calculating the LLCS of seaweed throughout its whole life cycle in Ailian Bay from nursery to processing into #biochar (fertilizer) as the final product.”
2/9 Image
The results showed that “the #CarbonSequestration (full life cycle) of kelp in Ailian Bay was 97.73g C /m2/year.”
3/9 Image
Read 9 tweets
Jun 9
🚨NEW STUDY🚨

Recent research submitted in the @researchsquare “presents first-of-its-kind process concepts for co-removal of #methane and #CO2 that combine the catalytic conversion of methane step (thermal/photo-catalytic) with #CO2Capture (#DirectAirCapture).”
1/17 Image
“The proposed solution to co-remove methane and CO2 from low concentration sources has the potential of #removing more CO2-equivalents from the atmosphere at lower energy penalty when compared to technologies that focus on removing only CO2 from the air, the study affirmed.”
2/ Image
Based on the analysis of this study, researchers summarize the following challenges and opportunities with the proposed solution for co-removing methane and CO2 from the atmosphere:
3/
Read 17 tweets
Jun 1
🚨NEW STUDY🚨

Recent analysis published in @naturesustainab “use #biogeochemical simulations to show that restoration of the marine ecosystems can lead to permanent #CO2Removal by driving #OceanAlkalinityEnhancement & atmosphere-to-ocean #CO2Fluxes.”

Key findings in a🧵⬇️
1/12 Image
Findings of this study suggest that “restoring mangroves, which are common in tropical shallow marine settings, will lead to notable local #OceanAlkalinityEnhancement across a wide range of scenarios.”
2/ Image
“The process is seagrass & mangroves influence the organic & inorganic cycling of C in sediment, with strong impacts on diffusive #alkalinity fluxes. In carbonate-rich sediment, seagrass & mangroves foster carbonate dissolution, resulting in increased alkalinity production...
3/
Read 12 tweets
May 30
🚨NEW STUDY🚨

🌋 A recent study by @Olenellus & @GambixPT published in @geosociety found that “an extinct #volcano off the shore of Portugal could store as much as 1.2-8.6 gigatons of CO2, the equivalent of 24-125yrs of the country’s industrial emissions.”
#CarbonStorage

🧵1/9 Image
“Doing so would rely on a method known as in situ mineral #carbonization, which works when the CO2 taken from the air is pumped deep underground.”
2/9
“Once in the bowels of this extinct volcano, calcium, magnesium, and iron react to the incoming carbon dioxide to form calcite, dolomite, and magnesite, trapping the CO2 forever in a rocky prison.”
3/9
Read 9 tweets
May 28
📝💡 𝐖𝐞𝐞𝐤𝐥𝐲 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝
Here's your roundup of top #CarbonDioxideRemoval News Articles / Scientific Papers from the past week:
🌱🪨🎛️🌊
🧵1/12 Image
1️⃣ 🌱🚜 @undocarbon raises £9.6 million ($11.93 million) in funding for its #EnhancedRockWeathering technology led by @lowercarbon.
#ERW

🌱📜➡️
2/
2️⃣💵 In an effort to neutralize its environmental footprint, JP Morgan has announced it plans to invest more than $200 million to purchase credits from several #CarbonDioxideRemoval companies (“one of the biggest bets ever on #CarbonRemoval”).

💵📜➡️
3/
Read 12 tweets

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