Flipkens et al. (2026): The carbon dioxide removal potential of cement and lime kiln dust via ocean alkalinity enhancement
Gunter Flipkens, Greet Lembregts, and Filip J.R. Meysman, IN: Biogeosciences, https://doi.org/10.5194/bg-23-399-2026
Ocean alkalinity enhancement (OAE) is a proposed method for atmospheric carbon dioxide removal (CDR), and involves the addition of alkaline minerals to surface waters to elevate seawater alkalinity and enhance atmospheric CO₂ storage. Cement kiln dust (CKD) and lime kiln dust (LKD) are alkaline side streams from the cement and lime industry that have OAE potential due to their widespread availability and fine particle size. Here, the authors evaluated the dissolution kinetics, CO₂ sequestration potential, and ecological risks of CKD and LKD by means of laboratory dissolution experiments.