Effect of Alkaline Types on the Production of Calcium Carbonate Particles from Gypsum Waste for Fixation of CO 2 by Mineral Carbonation

Industrial by-products have been used as an alternative raw material for the long-term storage of CO 2 as a mineral carbonate with various polymorphs and properties. For example; desulfurization gypsum (DG) obtained from a power station has great potential due to its high CaO content. This study used a mineral carbonation process to produce CaCO 3 particles (PCC) from DG wastes for fixation of CO 2 The effects of solid-to-liquid ratio (1:13, 1:9, and 1:7) and hydroxide sources (NaOH, NH 4 OH) on properties of PCC were determined using XRD, SEM, FTIR, AAS, and wet chemical analyses. Calcite crystals were produced in all cases with the use of NaOH, whereas calcite crystals along with spherical vaterite crystals were observed in the presence of NH 4 + . This study suggested a good option due to not only fixation of CO 2 but also production of PCC with a high purity. © 2018, © 2018 Taylor & Francis.FBA-2017-7912The author thanks the Research Fund Project of Çukurova University (FBA-2017-7912) for their financial support. The author also thanks anonymous reviewers for their suggestions