Characterization of Nano Calcium Carbonate Extracted from Eggshells

Abstract

Organic waste, especially eggshells, represents a valuable resource for the synthesis of calcium carbonate nanoparticles, which have significant industrial and medical applications. This study describes the methodology for converting eggshells into calcium carbonate nanoparticles through heat treatment and nano milling processes. Advanced characterization techniques, including TEM, SEM, and AFM, were used to analyze the morphology and structure of the synthesized nanoparticles. The particles were found to be of nanometer dimensions, with a size of around 150 nm and a distinctive spherical shape, as shown in the TEM images. SEM images showed that the surface of calcium carbonate nanoparticles synthesized from eggshells is smooth, crystalline, and spherical or nearly spherical. FTIR analysis revealed the presence of distinct functional groups for calcium carbonate, with peaks at 713–868 cm⁻¹, consistent with previous studies. The results show that nanoparticles manufactured from calcium carbonate possess unique properties that enhance their applicability in various fields, and promote sustainability and environmental preservation.