A simple rapid route to synthesize monocalcium phosphate monohydrate using calcium carbonate with different phases derived from green mussel shells

Calcium carbonate with different phases was successfully prepared by a rapid simple, easily available, low-cost instrument, an environmentally benign method using only mechanical grinding process of green mussel shells. Three mixed calcium carbonate phases consisting of vaterite (87.75%), aragonite (4.40%) and calcite (7.85%), obtained from green mussel shells were used for the first time to produce monocalcium phosphate monohydrate Ca(H2PO4)2•H2O, which was prepared by the mechanical mixing of the as-synthesized CaCO3 and phosphoric in aqueous-acetone media at ambient temperature with short time consumption (30 min). The as-synthesized CaCO3 and Ca(H2PO4)2•H2O products were characterized by thermal gravimetric analysis (TG/DTG), X-ray powder diffraction (XRD), FTIR spectroscopy and scanning electron microscopy (SEM). The reproducible and low-cost method suggested that it could be used in industry for the large scale synthesis of CaCO3 and Ca(H2PO4)2•H2O from green mussel shells and expected to be alternative for the removal and value-added of green mussel shells to reduce enormous wastes in the future.