[Day 1, June 10th, Poster Session, 17:30 - 18:30 CEST]
I will be presenting a poster at the 4th International Conference on Carbon Dioxide Removal on the chemical stability of bicarbonate-enriched seawater for ocean-based carbon dioxide storage.
My work focuses on a pH-equilibrated ocean alkalinization approach, where CO2 and Ca(OH)2 are reacted in seawater to produce a bicarbonate enriched solution close to ambient seawater pH. We tested this approach in 15 mesocosms over 76 days, using different levels of added carbon.
The key question is whether the added carbon remains stable in seawater, or whether it is lost through secondary carbonate precipitation and CO2 degassing.
Our results suggest that moderate bicarbonate enrichment can remain chemically stable for nearly two months, while oversaturated conditions become counterproductive and reduce carbon storage efficiency.
I would be very interested to discuss how ocean alkalinity enhancement dosing can be made more site-specific and adaptive to local seawater conditions.