Effects of microwave processing parameters on the properties of nanohydroxyapatite: Structural, spectroscopic, hardness, and toxicity studies

Sari, Yessie Widya; Saputra, Angga; Bahtiar, Abdurrahman; Nuzulia, Nur Aisyah

doi:10.1016/j.ceramint.2021.07.182

Cited by 9 publications

(11 citation statements)

References 63 publications

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“…Numerous reports deal with the transformation of ESW using o-phosphoric acid [2,8,10,13,[27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]55], but the possibility of the production of calcium hydrogen phosphate from ESW has been reported by only one scientific report [42] and one patent [56]. Laohavisuti et al [42] prepared calcium hydrogen phosphate of high purity/yield of 99.63% using ESW, which is much higher than the mass yield observed in our research (77.06 ± 6.21%), but authors used an ESW calcination at 500 • C for two hours where all organic matter was incinerated, and a much greater o-phosphoric concentration (50%) for the solvation of ESW calcium carbonate.…”

Section: Eggshell Waste Transformation Using 10% Acetic and 15% O-pho...mentioning

confidence: 99%

“…In continuation of our efforts oriented toward the complete utilization of ESW, in our present research, we have examined the possibility of chemical transformation of ESW with acetic and o-phosphoric acid to the corresponding calcium salts and eggshell membranes. Although the use of o-phosphoric and acetic acid for the production of corresponding Ca-salts from eggshell waste, such as calcium hydroxyapatite [2,8,10,13,[27][28][29][30][31][32][33][34][35][36][37][38][39], calcium triphosphate [13,28,[30][31][32]34,38,[40][41][42], calcium diphosphate [42,43] and much less studied calcium monophosphate [42] or calcium acetate [44,45], have been reported, the novelty of our research lies in the use of eggshell halves and pieces In this respect, our research group has been oriented towards the possibility of the complete utilization of eggshell waste, using the most common industrial processes, such as mixing, filtration, evaporation and drying, but with the aim of producing high-value-added products. Our most recent publication [1] has proven the possibility of ESW utilization for the production of egg white protein solution, calcium chloride dihydrate as a food-grade additive, and eggshell membranes, using ESW transformation with 5% (w/v) hydrochloric acid.…”

Section: Introductionmentioning

confidence: 99%

“…In continuation of our efforts oriented toward the complete utilization of ESW, in our present research, we have examined the possibility of chemical transformation of ESW with acetic and o-phosphoric acid to the corresponding calcium salts and eggshell membranes. Although the use of o-phosphoric and acetic acid for the production of corresponding Ca-salts from eggshell waste, such as calcium hydroxyapatite [2,8,10,13,[27][28][29][30][31][32][33][34][35][36][37][38][39], calcium triphosphate [13,28,[30][31][32]34,38,[40][41][42], calcium diphosphate [42,43] and much less studied calcium monophosphate [42] or calcium acetate [44,45], have been reported, the novelty of our research lies in the use of eggshell halves and pieces instead of milled ones, the chemical transformation of eggshell waste calcium carbonate with diluted acids instead of those with higher percentages, the use of room temperature during the ESW chemical transformation into salt solutions and ESMs instead of higher ones, as well as the production of calcium salts as the major product and corresponding eggshell membranes as valuable by-products. Moreover, ESW-derived calcium acetate monohydrate and calcium hydrogen phosphate obtained in this research were fully examined in the prescribed demands regarding their suitability as food-grade additives.…”

Section: Introductionmentioning

confidence: 99%

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Eggshell-Waste-Derived Calcium Acetate, Calcium Hydrogen Phosphate and Corresponding Eggshell Membranes

et al. 2023

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The development of innovative transformation techniques for various wastes generated by the agri-food industry is one of the goals of sustainable waste management oriented toward “zero-waste” approach. This includes the production of bulk and fine chemicals, bioactive compounds, enzymes and functional materials from various waste. The present research shows the possibility of the production of value-added products from eggshell waste using chemical transformation by acetic and o-phosphoric acid at a laboratory scale level. Eggshell-derived calcium acetate monohydrate and calcium hydrogen phosphate, both of high purity, as well as corresponding eggshell membranes as valuable by-products, were produced. Chemical transformation of 100 g of eggshell waste with 10% (w/v) acetic acid resulted in 111.41 ± 2.13 g of calcium acetate monohydrate and 2.90 ± 0.14 g of eggshell membranes, with a chemical yield in calcium acetate monohydrate of 79.16 ± 1.98%. On the other hand, the transformation of 100 g of eggshell waste in 15% (w/v) o-phosphoric acid yielded 77.06 ± 6.21 g of calcium hydrogen phosphate and 2.94 ± 0.08 g of eggshell membranes, with a chemical yield in calcium hydrogen phosphate of 71.36 ± 5.58%. Eggshell-derived calcium hydrogen phosphate met all prescribed criteria for food-grade additive, as determined by physicochemical analysis. On the other hand, calcium acetate monohydrate met the majority, except water insoluble and formic acid and oxidizable impurities content. Based on the obtained results, it can be concluded that the proposed eggshell waste transformation process by two different acids might be useful for the production of calcium acetate and calcium hydrogen phosphate as food-grade additives, as well as eggshell membranes as valuable by-products.

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Section: Eggshell Waste Transformation Using 10% Acetic and 15% O-pho...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In continuation of our efforts oriented toward the complete utilization of ESW, in our present research, we have examined the possibility of chemical transformation of ESW with acetic and o-phosphoric acid to the corresponding calcium salts and eggshell membranes. Although the use of o-phosphoric and acetic acid for the production of corresponding Ca-salts from eggshell waste, such as calcium hydroxyapatite [2,8,10,13,[27][28][29][30][31][32][33][34][35][36][37][38][39], calcium triphosphate [13,28,[30][31][32]34,38,[40][41][42], calcium diphosphate [42,43] and much less studied calcium monophosphate [42] or calcium acetate [44,45], have been reported, the novelty of our research lies in the use of eggshell halves and pieces instead of milled ones, the chemical transformation of eggshell waste calcium carbonate with diluted acids instead of those with higher percentages, the use of room temperature during the ESW chemical transformation into salt solutions and ESMs instead of higher ones, as well as the production of calcium salts as the major product and corresponding eggshell membranes as valuable by-products. Moreover, ESW-derived calcium acetate monohydrate and calcium hydrogen phosphate obtained in this research were fully examined in the prescribed demands regarding their suitability as food-grade additives.…”

Section: Introductionmentioning

confidence: 99%

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Eggshell-Waste-Derived Calcium Acetate, Calcium Hydrogen Phosphate and Corresponding Eggshell Membranes

et al. 2023

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“…It is a stoichiometric calcium phosphate with chemical formulae of Ca 10 (PO 4 ) 6 (OH) 2 . Several methods have been developed for the rapid fabrication of HA, including ultrasonic assisted sol gel [3], microwave assisted hydrothermal [4], and microwave assisted precipitation methods [5].…”

Section: Introductionmentioning

confidence: 99%

“…To mimic this condition, carbonate ion has been incorporated during the CHA synthesis [5,10,11,12,13].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Polyvinyl Alcohol on the Multicomponent Biopolymer/ Hydroxyapatite/Carbonated Hydroxyapatite Composite

Sari¹,

Munir²,

Saputra³

et al. 2023

Preprint

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In this study, the synthesis of composite biomaterials consisting of hydroxyapatite (HA)/carbonated hydroxyapatite (CHA) with polymeric porous scaffolds is reported. Multicomponent biodegradable polymers were applied as the scaffold. These consist of alginate and chitosan. The effect of polyvinyl alcohol (PVA) involvement in the multicomponent polymeric scaffold was also investigated. The scaffold was loaded with HA/CHA, as bone graft materials, at various compositions. Asian moon scallop shell (Amusium pleuronectes) was used as a calcium biogenic resource for HA and CHA synthesis The effect of the PVA and HA/CHA concentration was investigated. In the absence of the PVA, the morphological study showed that the samples had porous structures with good pore interconnectivity. The XRD analysis showed that PVA reduced the crystallinity of the bone graft. The HA/CHA crystals were homogeneously dispersed. The introduction of PVA reduced the pore size and the porosity but provide stiffer materials, indicating that PVA may improve the mechanical properties of the composite. Some samples also showed the presence of small and large pores. The weight percentage content of HA or CHA influenced the crystallinity, indicating the possibility for the fabrication of tailored bone substitute materials.

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Hot-pressed calcium phosphates as a potential bone substitute: structural and mechanical characterization

Pereira,

Carvalho,

Bdikin

et al. 2024

Int J Adv Manuf Technol

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The compositional similarity of calcium phosphates such as β-TCP and HAp to the inorganic components of human bones makes them excellent candidates for bone substitutes. Regardless of presenting excellent biocompatibility, calcium phosphates present low mechanical strength, which is a major drawback for load-bearing applications. In this sense, achieving Hap or β-TCP with increased density is crucial to enhance their mechanical properties. In the present study, β-TCP and HAp were processed from commercially available powders in order to obtain highly dense specimens aiming to elevate these mechanical properties of calcium phosphates. For this purpose, two sintering strategies were used: in the first, using a single holding time, whereas in the second, two holding times. The obtained phases, their potential degradation, microstructure, porosity, and mechanical strength were investigated. Results revealed that the use of two holding times improved densification, leading to flexural strength improvement, on both materials, but especially on HAp, where a 122% increase was verified.

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Effects of microwave processing parameters on the properties of nanohydroxyapatite: Structural, spectroscopic, hardness, and toxicity studies

Cited by 9 publications

References 63 publications

Eggshell-Waste-Derived Calcium Acetate, Calcium Hydrogen Phosphate and Corresponding Eggshell Membranes

Eggshell-Waste-Derived Calcium Acetate, Calcium Hydrogen Phosphate and Corresponding Eggshell Membranes

The Effect of Polyvinyl Alcohol on the Multicomponent Biopolymer/ Hydroxyapatite/Carbonated Hydroxyapatite Composite

Hot-pressed calcium phosphates as a potential bone substitute: structural and mechanical characterization

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