Preparation and characterization of calcium oxide from snail shell

Abstract

This paper studied the synthesis of calcium oxide (CaO) from snail shells by calcination, crushing, and grinding. Then, the sample was analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), specific surface area (BET), and particle size. The XRD result showed obtained CaO content of 98.7%. FTIR spectrum analysis revealed a sharp band appeared at 3647 cm^-1 due to the formation of Ca(OH)₂ and the band at 1419 cm^-1 was the characteristic peak of CaO. SEM images supplied a fairly uniform crystal structure and high porosity capillary. TGA analysis also gave a clear mass loss in two temperature ranges from 320-500^oC and 515-780^oC. At the same time, our results are compared with previous related studies.