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Carbonic anhydrase (CA) enzymes have gained considerable attention for their potential use in carbon dioxide (CO₂) capture technologies because they are able to catalyze rapidly the interconversion of aqueous CO₂ and bicarbonate. However, there are challenges for widespread implementation including the need to develop mineralization process routes for permanent carbon storage. Mineral carbonation of highly reactive feedstocks may be limited by the supply rate of CO₂. This rate limitation can be directly addressed by incorporating enzyme-catalyzed CO₂ hydration. This study examined the effects of bovine carbonic anhydrase (BCA) and CO₂-rich gas streams on the carbonation rate of brucite [Mg(OH)₂], a highly reactive mineral. Alkaline brucite slurries were amended with BCA and supplied with 10% CO₂ gas while aqueous chemistry and solids were monitored throughout the experiments (hours to …