Li et al. (2026): Alkaline materials for coastal ocean alkalinity enhancement: A comparative study of natural silicates and industrial byproducts
Xinyu Li, Zhe Zhou, Heng Xiao, Jiangtao Li and Shouye Yang, IN: Marine Pollution Bulletin, https://doi.org/10.1016/j.marpolbul.2026.119338
Coastal ocean alkalinity enhancement (OAE) is a promising ocean-based carbon dioxide removal (CDR) approach for mitigating climate change and counteracting ocean acidification. However, uncertainties persist regarding the efficacy and environmental safety of alkaline materials under realistic coastal conditions. This study comparatively investigated the CO₂ sequestration potential, geochemical processes, and environmental impacts of four alkaline materials—natural silicates (olivine, basalt) and industrial byproducts (fly ash, steel slag)—through laboratory incubations with natural seawater (filtered and unfiltered) and in situ deployments off the East China Sea.