Pemanfaatan Limbah Cangkang Kijing (Pilsbryoconcha Exilis) sebagai Sumber Hidroksiapatit dengan Metode Presipitasi Double Stirring sebagai Bahan Biomaterial

Abstract

Research has been conducted on the synthesis and characterization of hydroxyapatite of kijing shells. Kijing shells (Pilsbryoconcha exilis) are a potential natural resource in the Belawan mangrove forest area, North Sumatra. Kijing shell waste has not been managed optimally, so it has the potential to have a negative impact. Mussel shells have a high calcium content which has the potential to be utilized as a calcium precursor in the synthesis of hydroxyapatite (HAp) using the double stirring precipitation method at variations in sintering temperatures of 800°C, 900°C, and 1000°C which aims to utilize mussel shells as Ca precursors to synthesize hydroxyapatite. Analysis of kijing shell ash using XRF shows that the dominant element content is the element Calcium (Ca) of 64.268% with Calcium Oxide (CaO) compounds of 52.482% and there are still many other elements, such as Aluminum (Al) and Silica (Si). The results of characterization using XRD show that HAp obtained has a degree of crystallinity of 22.13%, 29.95%, and 32.95%, respectively. The highest degree of crystallinity value at 1000°C. The average crystal size of the three samples is 32-68 nm which meets the standards of biomedical applications. The crystal structure of the hydroxyapatite of the three samples is hexagonal. From the results of the FTIR test, the three samples obtained wave numbers indicating the functional groups 0H-, CO32-, PO43- which are the dominant functional groups that make up hydroxyapatite. Sample A1 has an average pore diameter of 1960.77 nm, A2 of 1234 nm, A3 of 925.899 nm. EDX results show the Ca/P ratio of the three samples are 1.67; 1.45; and 1.61, respectively. Sample A1 has an average pore diameter of 1960.77 nm, A2 of 1234 nm, A3 of 925.899 nm.