Preparation and characterization of hydroxyapatite from eggshell

Gergely, Gréta; Wéber, Ferenc; Lukács, István Endre; Tóth, A.L.; Horváth, Zsolt Endre; Mihály, Judit; Balázsi, Csaba

doi:10.1016/j.ceramint.2009.09.020

Cited by 230 publications

(109 citation statements)

References 16 publications

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“…Hydroxyapatite (HAp, Ca 10 (PO 4 ) 6 (OH) 2 ) is among the few materials that are classified as bioactive, meaning that it will support bone in growth and osseointegration [1]. The chemical and structural similarity of HAp with bone minerals has proven to be hydroxyapatite, an attractive biomaterial for bone and tooth implantation.…”

Section: Introductionmentioning

confidence: 99%

Access to Optimal Calcination Temperature for Nanoparticle Synthesis from Hydroxyapatite Bovine Femur Bone Waste

Hammood¹,

Hassan²,

Alkhafagy³

2017

Nano BioMed ENG

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Hydroxyapatite (HAp) is one of the vital and bioactive materials that are commonly used in biomedical field and concentrated in clinical area. It is a bio-ceramic powder synthesized by using different bio-waste materials such as bovine femur bone. In this study, the bovine femur bone powder was prepared to obtain nano powder. The purpose of this study was to reach the optimal temperature to obtain nanoparticles HAp. The resulted powder was calcinated in a furnace at different temperatures (900, 950, 1000, 1050 and 1100 °C) for 2 h at the heating rate of 10 °C/min and cooled slowly in a furnace. Results showed, the formation of pure HAp by the presence of peaks corresponding to (PO 4 ) 3-at 632/cm and OH -at 3,572/cm in fourier transformation infrared spectroscopy (FTIR). For the calcined samples, there were three main peaks of 211, 112 and 300 planes at 2θ near 31.8, 32.2 and 32.9 respectively. The amorphous raw bones were transformed into crystalline phase and the lattice parameters for HAp c and a were calculated in X-ray diffraction (XRD), Raman analysis showed that the calcination process removed the organic compound from the bovine femur bones matrix. Scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX) showed that the shape of the granules was irregular, containing quantities of oxygen, magnesium, sodium and carbon; the ratio of calcium to phosphate was calculated, Atomic force microscopy (AFM) showed that the particles sizes ranged from nanometers to microns. EDX result found that the calcium to phosphate ratio reached 1.7058 after calcination at 950 °C which was close to stoichiometric hydroxyapatite (1.67). This result implied the formation of pure HAp phase at 950 °C.

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Section: Introductionmentioning

confidence: 99%

Access to Optimal Calcination Temperature for Nanoparticle Synthesis from Hydroxyapatite Bovine Femur Bone Waste

Hammood¹,

Hassan²,

Alkhafagy³

2017

Nano BioMed ENG

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“…The bending modes of calcium carbonate can be well defined by infrared band at 861.62 cm -1 [27]. The presence of aragonite in cockle shell can be further confirmed by a IR spectra at 1082.75 cm -1 of CO 3 2-symmetric stretching [26,28,29]. While the sharp band at 712.77 cm -1 is related to Ca-O bonds [29].…”

Section: Ftir Spectra Analysismentioning

confidence: 58%

“…The presence of aragonite in cockle shell can be further confirmed by a IR spectra at 1082.75 cm -1 of CO 3 2-symmetric stretching [26,28,29]. While the sharp band at 712.77 cm -1 is related to Ca-O bonds [29]. In the OH stretching vibration region, strong peak at 3642.22 cm -1 was observed in IR spectra of synthesized CaO (refer to Fig.…”

Section: Ftir Spectra Analysismentioning

confidence: 58%

“…In the OH stretching vibration region, strong peak at 3642.22 cm -1 was observed in IR spectra of synthesized CaO (refer to Fig. 3(c)) due to intensity of surface OH band increase with increasing of temperature as compared with raw cockle shell [25,29]. The two carbonate bands at ~ 700 cm -1 in aragonite were not extinction in Fig.…”

Section: Ftir Spectra Analysismentioning

confidence: 91%

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Sorption equilibria of CO₂ on synthesized CaO in the presence of water

Azmi

Yusup

Sabil

2015

WIT Transactions on Ecology and the Environment

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Calcium-based adsorbents produced by biomass material is technically feasible, costly effective and advantageous to a certain extent in capturing CO 2 . Since the waste of a cockle shell is found to contain around 98% calcium, it can be a good source for CaCO 3 and yield CaO through the high temperature calcination process. The sorption equilibria of CO 2 on synthesized CaO with different amounts of water were measured experimentally by using a volumetric method at a temperature of 2°C. Under dry conditions, synthesized CaO has a low CO 2 uptake, as the adsorption rate of CO 2 in calcium-based sorbent is high at higher temperatures. While under wet conditions, the large increment of CO 2 adsorption was observed due to formation of CO 2 hydrates which were indicated by inflection of isotherms at a definite pressure of the S-shape. At the inflection point, the highest sorption capacity (5.07 mmol/g) was obtained at a water ratio of 0.55, which is about 30 times higher than dry samples. The trend of FTIR spectra were observed to be similar for raw cockle shells and wet CaO after CO 2 adsorption, in contrast with spectra of CaO before adsorption. The formation of CO 2 hydrate can be further verified by the changes of surface morphology of CaO, before and after adsorption. It can be concluded that calcium-based sorbent with the presence of water has the ability to be further utilized for CO 2 separation.

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“…To prepare CaO, the egg shell was washed with deionized water, and dried in an oven at 105 0 C for 24 h. The dried egg shell was milled by hand using a mortar for calcination at 900 0 C for 3 h in a preheated furnace [31,32]. The calcined egg shell was cooled in a desiccator.…”

Section: Preparation Of Desorbent Solutionmentioning

confidence: 99%

Experimental Evaluation of Activated Termite Mound for Fluoride Adsorption

Fufa¹

2016

IOSR

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Preparation and characterization of hydroxyapatite from eggshell

Cited by 230 publications

References 16 publications

Access to Optimal Calcination Temperature for Nanoparticle Synthesis from Hydroxyapatite Bovine Femur Bone Waste

Access to Optimal Calcination Temperature for Nanoparticle Synthesis from Hydroxyapatite Bovine Femur Bone Waste

Sorption equilibria of CO₂ on synthesized CaO in the presence of water

Experimental Evaluation of Activated Termite Mound for Fluoride Adsorption

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Preparation and characterization of hydroxyapatite from eggshell

Cited by 230 publications

References 16 publications

Access to Optimal Calcination Temperature for Nanoparticle Synthesis from Hydroxyapatite Bovine Femur Bone Waste

Access to Optimal Calcination Temperature for Nanoparticle Synthesis from Hydroxyapatite Bovine Femur Bone Waste

Sorption equilibria of CO2 on synthesized CaO in the presence of water

Experimental Evaluation of Activated Termite Mound for Fluoride Adsorption

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Product

Resources

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Sorption equilibria of CO₂ on synthesized CaO in the presence of water