Influencing Factors of the Mineral Carbonation Process of Iron Ore Mining Waste in Sequestering Atmospheric Carbon Dioxide

摘要: Mining waste may contain potential minerals that can act as essential feedstock for long-term carbon sequestration through a mineral carbonation process. This study attempts to identify the mineralogical and chemical composition of iron ore mining alongside effects particle size, temperature, pH on efficiency. The samples were found be alkaline in nature (pH 6.9–7.5) contained small-sized particles clay silt, thus indicating their suitability reactions. Samples composed important silicate needed formation carbonates such wollastonite, anorthite, diopside, perovskite, johannsenite, magnesium aluminum silicate, Fe-bearing magnetite. presence Fe2O3 (39.6–62.9%) CaO (7.2–15.2%) indicated sequester dioxide because these oxides are divalent cations carbonation. use mine-waste enables enhancement efficiency, i.e., <38 µm showed greater extent Fe Ca efficiency (between 1.6–6.7%) compared <63 (0.9–5.7%) 75 (0.7–6.0%). Increasing reaction temperature from 80 °C 150–200 resulted higher some between 0.9–5.8% 0.8–4.0%, respectively. effect increasing 8–12 was notably observed 0.7–5.9% 12) 0.6–3.3% 8). moderately (0.7–5.5%) with 8–10. Therefore, it has been evidenced great importance process, pH, influential determining Findings would beneficial sustaining industry while taking into account issue production tackling global emission concerns.