Precipitation Method in Calcium Phosphat Synthesis from Blood Clamshells (Anadara Granosa)

Abstract

Sources of calcium phosphate can be produced from materials containing calcium carbonate (CaCO₃). These materials are usually found in clamshells, eggshells and limestone. Calcium phosphate can be produced by chemical precipitation by reacting calcium carbonate (CaCO₃) from a material containing CaCO₃ with HCl and then reacting again with Na₂HPO₄ and calcium phosphate Ca₃(PO4)₂ is obtained. In this study raw materials used for blood clamshells waste. Precipitation is a method which results in the formation of solids in solution or in other solids during chemical reactions. From the results of XRF analysis it can be seen that the best results entered in the classification of calcium phosphate are at pH 8 with a stirring time of 3 hours and pH 9 with a stirring time of 4 hours there is a Ca/P value of 1.5. At the Ca/P value it forms Tricalcium Phosphate. There are 3 types of Tricalcium Phosphate which are α, β and amorphous. It can be concluded that the longer the stirring time and the pH value increase, the Ca / P value also increases. To form TCP (Tricalcium Phosphate).