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Facile Synthesis of Hydroxyapatite Particles from Cockle Shells (Anadaragranosa) by Hydrothermal Method

Yelmida Azis, Novesar Jamarun, Syukri Arief, Hadi Nur
2015 Oriental Journal of Chemistry  
Calcium is one of abundant elements in nature both from natural sources (egg shells, corals, cockle shells, bones) and in the form of natural product (limestone) 1,2 . The cockle shell (Anadaragranosa), a lenient animal (mollusca) of bivalvia class (Fig. 1) , is one of the potential calcium sources. Moreover, 95% main composition of the ABSTRACT Hydroxyapatite particles, Ca 10 (PO 4 ) 6 (OH) 2, (HAp), have been successfully synthesized by hydrothermal method using cockle shells (Anadaragranosa)
more » ... ls (Anadaragranosa) waste as the starting material. The cockle shells were calcined, hydrated (slaking) and undergone carbonation to form precipitated calcium carbonate (PCC).The PCC was added with (NH 4 ) 2 HPO 4 to form HAp by varying the temperatures and reaction times under basic condition (pH 10 -11). The X-ray Diffraction (XRD) patterns revealed that the excellent product of HAp with hexagonal crystal structure can obtained via facile hydrothermal procedure (140 o C for 16 h). Fourier transform infrared spectroscopy (FTIR) spectra analyses showed the presence of OH, HPO 4 2-, and PO 4 3absorption bands, indicating the formation of HAp. The dried HAp particles powder was extremely pure with a specific surface area of 17.8 m²/g.
doi:10.13005/ojc/310261 fatcat:na5s6z3lqredvaoctryb6zguse