New #enhancedweathering paper: Cation tracing reveals substantial weathering but no inorganic C sequestration. While inorganic C storage may lag behind, secondary reactions & cation retention may support soil organic C stabilization. #CDR @arthurvienne.bsky.social soil.copernicus.org/articles/12/...

Weathering without realizing inorganic CO2 removal revealed through base cation monitoring

Abstract. Enhanced Weathering using basalt rock dust is a scalable carbon dioxide removal (CDR) technique, but quantifying rock weathering and CDR rates poses a critical challenge. Here, we investigat...

soil.copernicus.org

Ocean Alkalinity Enhancement (OAE) is a marine CO2 removal method that uses alkaline material to increase the storage capacity for anthropogenic CO2 in seawater. Kiyas investigated how hydroxide (NaOH) induces taxonomic shifts in plankton. She found: 👇 🌊 onlinelibrary.wiley.com/doi/10.1111/...

Winners and losers under hydroxide‐based ocean alkalinity enhancement in a Tasmanian plankton community

Ocean alkalinity enhancement (OAE) is an emerging carbon dioxide CO2 removal approach for climate change mitigation and can be implemented with various alkaline materials that convert dissolved CO2 i...

onlinelibrary.wiley.com

📢Just out @globalchangebio.bsky.social: Soil organic carbon (SOC) is key for #enhancedweathering. We found negligible inorganic CO₂ removal, but considerable SOC storage potential. @boitolucilla.bsky.social @arthurvienne.bsky.social @patrickfrings.bsky.social onlinelibrary.wiley.com/doi/10.1111/...

Beyond Inorganic C: Soil Organic C as a Key Pathway for Carbon Sequestration in Enhanced Weathering

Enhanced weathering involves spreading crushed silicates on soils. Upon weathering of the applied silicates, CO2 is captured via two pathways: pedogenic carbonate formation and leaching of bicarbonat....

onlinelibrary.wiley.com

1) No taxonomic shifts could be detected when alkalinity additions (500 umol/kg, i.e. substantial!) are matched with immediate CO2 influx (i.e. pH excursions are minimal). Thus, the extra CO2 stored as bicarbonate in seawater did not negatively or positively affect the community. 🌊

One of the people fired from NOAA today is the director of the Ocean Acidification Program. That program also leads the U.S. government's effort on marine carbon dioxide removal (mCDR). The destruction of American science is incomprehensible.

Home - NOAA Ocean Acidification Program

NOAA's Ocean Acidification Program prepares us for the impacts of ocean acidification through research and interdisciplinary partnerships.

oceanacidification.noaa.gov

www.planetarytech.com/1k-tonnes/ exciting news for OAE

Major Milestone: 1,000 Tonnes Removed And Counting - Planetary Technologies

A Major Milestone: 1,000 Tonnes of Carbon Removed – With More To Come Dartmouth, Nova Scotia — Planetary has successfully removed 1,000 net tonnes of CO2 directly from the atmosphere through its ocean...

planetarytech.com

www.nature.com/articles/s41... 1 mol Mg2SiO4 + 2 mol CaCO3 => 2 MgO + Ca2SiO4 (and approx 3 mol CO2 emitted for calcination) gives 8 mol CO2, or net 5 mol CO2 sequestered.👏 Interesting thermochemical olivine upgrading approach and an alternative to electrochemical olivine ==> Mg(OH)2. (1/2)

Thermal Ca2+/Mg2+ exchange reactions to synthesize CO2 removal materials - Nature

Reactions of Mg-rich silicates with calcium carbonates/sulfates result in the formation of materials that could potentially be used for low-cost carbon dioxide removal from the atmosphere.

nature.com

Biochar and Silicon: A Sustainable Boost for Rice Yields https://buff.ly/4aVkd38 #Biochar #CarbonCapture #Pyrolysis

Biochar’s Big Year: 107,000 Tonnes Delivered Amid 8M Tonne Carbon Removal Boom https://buff.ly/3WL5mT5 #Biochar #CarbonCapture #Pyrolysis

📣Teaming up with @cbiogeo.bsky.social for a #Macrocosms experiment on algae-based #biochar & #basalt for enhanced weathering in a realistic #controlled-environment setup. #ecotron @anaeefrance.bsky.social @cnrsoccitanieest.bsky.social Lysimeters ready! Reach out if you have ideas to collaborate!

📣New preprint! Enhanced weathering (EW) isn’t only about inorganic carbon. Our study shows (1) that weathering ≠ CO2 removal #CDR & (2) that the impact of EW on organic matter decomposition and stabilization is key for reliably estimating actual #CDR. www.researchsquare.com/article/rs-5...

Despite the nonsense we saw from Trump yesterday, please know that climate progress is continuing through other channels... This is important to keep in mind, every day.

Assaad Razzouk@assaadrazzouk.bsky.social · 2y ago

Good climate news this (and last) week 1 China reaches peak oil 2 Global electric vehicle sales up 25% in record 2024 3 US bans future oil & gas over 625m acres of waters 4 EU bank regulator tightens ESG rules 5 China’s first-ever energy law enters into force 1/

Are enhanced rock weathering rates overestimated? Here, we aim to contribute to the conversation around quantifying carbon dioxide removal in ERW applications while highlighting three aspects of rock powders' geochemical and mineralogical compositions that can lead to overestimating rates. #CDR

Frontiers | Are enhanced rock weathering rates overestimated? A few geochemical and mineralogical pitfalls

frontiersin.org

Interesting study that concludes processing ultramaphic rock to Mg(OH)2 may be an attractive pathway for CDR.

Geoengineering Info@geoengineering1.bsky.social · 2y ago

NEW PAPER—Suitability of rocks, minerals, and cement waste for CO2 removal via enhanced rock weathering Read the study here: www.nature.com/articles/s42... #CDR #ERW

#phd #jobalert Within a multidisciplinary research project, funded by @ethzurich.bsky.social, we seek a doctoral student to develop and evaluate new geochemical tracers for the quantification of carbon dioxide removal following enhanced rock weathering applications.

PhD Position in Geochemistry of Enhanced Rock Weathering

jobs.ethz.ch