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This work addresses the synthesis of nanocrystalline barium, strontium, and calcium hydroxyapatites (Ca-HAps) via the chemical precipitation method, followed by calcination. To give a coherent picture of the most important structural, textural, and morphological properties of these materials and to investigate the influence of these characteristics over Co2+ ion adsorption capacity from aqueous solutions, the powders prepared were systematically characterized by X-ray diffraction, N2-physisorption measurements, scanning electron microscopy (SEM), energy dispersive X-ray spectrometry, and Fourier Transformed Infrared spectroscopy (FTIR). The results clearly showed that the Ca-HAp obtained exhibits better nanocrystallinity, greater structural stability, high surface area, high total pore volume, and mesoporosity, compared with the other synthesized hydroxyapatites, and that these physicochemical properties share a direct correlation with favorable Co2+ ion adsorption capacity at room temperature and pressure. The results proved that the physicochemical features of resulting alkaline-earth hydroxyapatites, prepared via the chemical precipitation method, played a fundamental role during the adsorption of heavy metal (with high toxicity) from aqueous solutions.
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This work addresses the synthesis of nanocrystalline barium, strontium, and calcium hydroxyapatites (Ca-HAps) via the chemical precipitation method, followed by calcination. To give a coherent picture of the most important structural, textural, and morphological properties of these materials and to investigate the influence of these characteristics over Co2+ ion adsorption capacity from aqueous solutions, the powders prepared were systematically characterized by X-ray diffraction, N2-physisorption measurements, scanning electron microscopy (SEM), energy dispersive X-ray spectrometry, and Fourier Transformed Infrared spectroscopy (FTIR). The results clearly showed that the Ca-HAp obtained exhibits better nanocrystallinity, greater structural stability, high surface area, high total pore volume, and mesoporosity, compared with the other synthesized hydroxyapatites, and that these physicochemical properties share a direct correlation with favorable Co2+ ion adsorption capacity at room temperature and pressure. The results proved that the physicochemical features of resulting alkaline-earth hydroxyapatites, prepared via the chemical precipitation method, played a fundamental role during the adsorption of heavy metal (with high toxicity) from aqueous solutions.

Synthetic alkaline-earth hydroxyapatites: Influence of their structural, textural, and morphological properties over Co2+ ion adsorption capacity

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Synthetic alkaline-earth hydroxyapatites: Influence of their structural, textural, and morphological properties over Co ion adsorption capacity

This work addresses the synthesis of nanocrystalline barium, strontium, and calcium hydroxyapatites (Ca-HAps) via the chemical precipitation method, followed...

Sample	S_BET (m² g⁻¹)^a	V_t (cm³ g⁻¹)^b	d_p (nm)^c	Co²⁺ ion adsorption capacity (%)
Ba-HAp	0.5216	0.0011	8.9231	6.03 ± 0.39
Sr-HAp	1.3874	0.0057	16.5310	17.46 ± 0.79
Ca-HAp	59.7000	0.1120	7.5046	56.84 ± 1.08

Synthetic alkaline-earth hydroxyapatites: Influence of their structural, textural, and morphological properties over Co²⁺ ion adsorption capacity

Publié en ligne: 10 nov. 2021

Pages: 252 - 264

Reçu: 19 mai 2021

Accepté: 20 sept. 2021

DOI: https://doi.org/10.2478/msp-2021-0022

Mots clés
barium hydroxyapatite, strontium hydroxyapatite, calcium hydroxyapatite, chemical precipitation synthesis, Co ion adsorption

© 2021 Francisco Granados-Correa et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Textural characteristics of synthesized alkaline-earth hydroxyapatite materials and Co2+ ion adsorption capacities in percentage.

Synthetic alkaline-earth hydroxyapatites: Influence of their structural, textural, and morphological properties over Co2+ ion adsorption capacity

Publié en ligne: 10 nov. 2021

Pages: 252 - 264

Reçu: 19 mai 2021

Accepté: 20 sept. 2021

DOI: https://doi.org/10.2478/msp-2021-0022

Mots clésbarium hydroxyapatite, strontium hydroxyapatite, calcium hydroxyapatite, chemical precipitation synthesis, Co ion adsorption

© 2021 Francisco Granados-Correa et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Textural characteristics of synthesized alkaline-earth hydroxyapatite materials and Co2+ ion adsorption capacities in percentage.

Synthetic alkaline-earth hydroxyapatites: Influence of their structural, textural, and morphological properties over Co²⁺ ion adsorption capacity

Mots clés
barium hydroxyapatite, strontium hydroxyapatite, calcium hydroxyapatite, chemical precipitation synthesis, Co ion adsorption