The carbon capture process using the mine tailings as carbonate compounds, as mentioned earlier, is a 4-step process where the leaching and filtration are followed by precipitation and, finally, separation of the products. The mine tailings contain various ions along with the necessary Ca 2+ and Mg 2+ ions needed for the precipitation of the value products, CaCO3 and MgCO3. This requires that the pure carbonates are precipitated selectively one after the other and separated from the solution. The method used for the carbonate precipitation is pH-swing since the leaching of the ions takes place at low pH conditions while the precipitation of the carbonates happens at high pH conditions where the solubility of CaCO3 and MgCO3 is quite low and almost all the carbonates formed can be precipitated and separated from the solution.