Procedure to use phosphogypsum industrial waste for mineral CO2 sequestration

► Phosphogypsum wastes are proposed to reduce CO2 greenhouse gas emissions. ► Phosphogypsum dissolution with NaOH results in Ca(OH)2 precipitation and Na2SO4. ► Aqueous carbonation of Ca(OH)2 with CO2 results in the CaCO3 precipitation. ► Metals contained in the phosphogypsum are transferred to the final calcite. ► Applications of CaCO3 and Na2SiO4 by-products are proposed to improve viability.