Synthesis of Hydroxyapatite from Eggshells Through Hydrothermal Process
| Main Authors: | Otabil Adam, Yeboah Faustina, Yongdan Hou |
|---|---|
| Format: | Article |
| Bahasa: | eng |
| Terbitan: |
, 2019
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/2633719 |
Daftar Isi:
- Hydroxyapatite was produced using hydrothermal process by reacting calcined eggshells with diammonium hydrogen phosphate at 100 oC and 110 oC for 2, 4, 6 and 8 hours respectively in which the kinetics of hydroxyapatite formation were determined. The crystalline size, crystallinity and amount of hydroxyapatite produced in each sample were obtained using the X-ray diffractometer. The maximum crystalline sizes ranged from 0.536 – 0.702 nm with the largest size occurring on sample treated for 110 oC for 8 hours. The degree of crystallinity and amount of HA formed increased with time and temperature with the largest crystallinity and amount of hydroxyapatite being 90.7 % and 94.5 % respectively, which occurred on sample treated at 110 oC for 8 hours. The rate constant relates to the temperature of hydroxyapatite formation by Arrhenius equation, yielding the activation energy of 193 KJ/mol.