Open AccessPreparation of hydroxyapatite by aqueous precipitation from calcium carbonate and phosphoric acid
Author(s) -
Byeong Woo Lee
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1113/1/012013
Subject(s) - phosphoric acid , aqueous solution , citric acid , calcium carbonate , precipitation , chemistry , calcium hydroxide , calcium , carbonate , inorganic chemistry , chemical engineering , nuclear chemistry , organic chemistry , meteorology , physics , engineering
Hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 , HAp) is the representative biological mineral which is hard to attain the solution equilibrium and difficult to produce by solution synthesis. HAp finds new application fields to remove harmful elements from polluted wastewater in industrial scales. The low-cost manufacturing process should be developed using abundant available CaCO 3 materials. Calcium carbonate (CaCO 3 ), as an economically feasible and abundant precursor, has been used in calcium source for the HAp synthesis. The synthesis was conducted by reacting CaCO 3 with phosphoric acid (H 3 PO 4 ) in aqueous solution with aid of citric acid and sodium hydroxide under moderate synthesis conditions. Compositionally pure HAp has been prepared. The process offered a relatively fast, convenient and economical route for the synthesis of HAp.