Microwave assistant synthesis of calcium phosphate minerals using hen’s eggshells as a calcium source

Abstract

In this study raw hen's eggshells were used as a calcium source for calcium phosphate mineral synthesis. The materials composed of brushite and different amounts of HA (hydroxyapatite) and β-TCP (β-tricalcium phosphate) with the needle-like, sheet-like and hexagonal structures were synthesized in the presence of the microwave. It was found that the time of microwave action, temperature and initial pH are parameters affecting the morphology and composition of the obtained materials, i.e. the increasing duration of MW exposure increases the amount of HA increases, whereas the temperature increase causes an increase in the contents of brushite and β-TCP. The lowering of initial pH leads to an increase in the brushite content.

Calcium extraction from catfish bone powder optimized by response surface methodology for inducing alginate bead

“…, rapid heating, shorter time, and more efficient energy transmission. The technique was used to reduce reaction time for calcium phosphate extraction from eggshells [ 12 ]. Replacement of the conventional extraction by a microwave assisted extraction enabled less solvent consumption with higher extraction from the calcium sennosides of senna leaves [ 13 ].…”