In this study, we investigated the short-term synergistic CO₂ removal effects of an olivine–diatom coculture system by intro-ducing fine-grained olivine powder directly into diatom cultures and observing the biological response. To account for potential
interference from olivine particles in cell counting, we conducted additional experiments in which olivine particles were enclosed within a dialysis bag to explore both the direct and indirect influences of diatom growth on olivine dissolution. We assessed the extent by which growth-mediated uptake of H₄SiO₄ by diatoms accelerated olivine dissolution. Finally, we evaluated the comprehensive CO₂ removal efficiency of the olivine–diatom coculture system through the fixation of organic and inorganic carbon.

olivine, diatom, negative carbon emission