Potential biomedical application of calcium phosphates obtained using eggshells as a biosource of calcium at different initial pH values

Kalbarczyk, Marta; Szcześ, Aleksandra

doi:10.1016/j.ceramint.2021.08.278

Cited by 9 publications

(2 citation statements)

References 33 publications

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“…The existence of the unique intense peak at 2θ = 31.75 • for the (211) plane is identified, which is a characteristic peak for the apatite formation, in addition to the other remaining peaks that are related to the HAp structure. So, the XRD pattern indicates the successful formation of a single pure crystalline hexagonal HAp phase where it is indexed and identified in accordance with JCPDS file number (09-0432) and matches well with the literature [19,30,31]. The calculated crystal size for synthesized HAp was found to be around 28 nm, using the Scherrer equation on the (002) plane.…”

Section: Resultssupporting

confidence: 82%

Sustainable and Environmentally Friendly Microwave Synthesis of Nano-Hydroxyapatite from Decarbonized Eggshells

Mahmoud

2024

Materials

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The sustainable microwave (MW) synthesis of hydroxyapatite (HAp) from decarbonized eggshells was investigated. Decarbonization of eggshells, as a natural source of calcium carbonate (CaCO3), was carried out in the current study at ambient conditions to reduce the footprint of CO2 emissions on our environment where either calcination or acidic direct treatments of eggshells produce CO2 emissions, which is a major cause for global warming. Eggshell decarbonization was carried out via the chemical reaction with sodium hydroxide (NaOH) alkaline solution in order to convert eggshell waste into calcium hydroxide (Ca(OH)2) and simultaneously store CO2 as a sodium carbonate (Na2CO3) by-product which is an essential material in many industrial sectors. The produced Ca(OH)2 was mixed with ammonium dihydrogen phosphate (NH4H2PO4) reagent at pH~11 before being subjected to MW irradiation at 2.45 GHz frequency for 5 min using 800 Watts to prepare HAp. The prepared Nano-HAp was characterized using X-ray diffraction (XRD) where the crystal size was ~28 nm using the Scherrer equation. The elongated rod-like nano-HAp crystals were characterized using scanning electron microscopy (SEM) equipped with dispersive energy X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). MW synthesis of decarbonized eggshells is considered as a sustainable and environmentally friendly route to produce promising bioceramics such as nano-HAp. Concurrently, decarbonization of eggshells offers the ability to store CO2 as a high value-added Na2CO3 material.

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Section: Resultssupporting

confidence: 82%

Sustainable and Environmentally Friendly Microwave Synthesis of Nano-Hydroxyapatite from Decarbonized Eggshells

Mahmoud

2024

Materials

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“…The scope of our research was to obtain the BCP material using wastes in the form of eggshells as a calcium source. In previous papers, the synthesis of biphasic and multiphasic calcium phosphate materials at different pH using hen eggshells has been described [33,34]. An element of the novelty is the reduction of energy consumption through the elimination of the sintering process during the synthesis.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Calcium Phosphate Materials Derived from Eggshells from Different Poultry with and without the Eggshell Membrane

et al. 2022

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Calcium phosphate materials such as hydroxyapatite (HA) or tricalcium phosphate (β-TCP) are highly attractive due to their multitude of applications in bone replacement as well as their environmental and ecological credentials. In this research, quail, hen, duck, and pigeon eggshells were used as a calcium source to obtain calcium phosphate materials via the environmentally friendly wet synthesis. Using the eggshells with the organic membrane, the biphasic calcium phosphate materials composed mainly of HA were obtained. The second mineral phase was β-TCP in the case of using quail, hen, and pigeon eggshells and octacalcium phosphate (OCP) in the case of duck eggshells. The HA content in the obtained materials depended on the amount of membrane in the eggshells and decreased in the order of pigeon, duck, hen, and quail eggshells. The eggshell membrane removal from the eggshells caused the reduced content of HA and the presence of the more soluble β-TCP or OCP phase in the obtained materials. The calcium ions release profile in the PBS buffer indicates the potential biomedical application of these materials.

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Properties of sintered zinc hydroxyapatite bioceramic prepared using waste chicken eggshells as calcium precursor

Mardziah

Ramesh

Chandran

et al. 2023

Ceramics International

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Potential biomedical application of calcium phosphates obtained using eggshells as a biosource of calcium at different initial pH values

Cited by 9 publications

References 33 publications

Sustainable and Environmentally Friendly Microwave Synthesis of Nano-Hydroxyapatite from Decarbonized Eggshells

Sustainable and Environmentally Friendly Microwave Synthesis of Nano-Hydroxyapatite from Decarbonized Eggshells

Synthesis and Characterization of Calcium Phosphate Materials Derived from Eggshells from Different Poultry with and without the Eggshell Membrane

Properties of sintered zinc hydroxyapatite bioceramic prepared using waste chicken eggshells as calcium precursor

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