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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/11775

Title: Synthesis of Hydroxyapatite from Eggshells Through Hydrothermal Process
Authors: Otabil, A.
Yeboah, F.
Hou, Yongdan
Keywords: Hydroxyapatite
Hydrothermal treatment
XRD analysis
Activation energy
Issue Date: Jul-2018
Publisher: Engineering Journal Undergraduate Research
Citation: Synthesis of Hydroxyapatite from Eggshells Through Hydrothermal Process. A. Otabil, F. Yeboah, Y Hou Gbologah. EJUR Volume 2/ Issue 1/ July 201
Abstract: 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 temperature of hydroxyapatite formation by Arrhenius equation, yielding activation energy of 193 KJ/mol.
Description: Research article
URI: http://hdl.handle.net/123456789/11775
Appears in Collections:College of Engineering

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