Chemical and Morphological Analysis of Calcium Oxide (CaO) Powder from Sea Urchin (Diadema setosum) Shell
Penulis/Author
Muhammad Amir Jamilludin (1); I Kadek Hariscandra Dinatha (2); Apri Supii (3); Dr. Juliasih Partini, S.Si., M.Si. (4); Prof. drh. Dwi Liliek Kusindarta, MP., Ph.D. (5); Prof. Dr. Eng. Yusril Yusuf, S.Si., M.Si., M.Eng. (6)
Tanggal/Date
2023
Kata Kunci/Keyword
Abstrak/Abstract
Calcium carbonate (CaCO3) has been taken from sea urchin (Diadema setosum) shell and
calcinated at several temperatures to obtain calcium oxide (CaO). X-Ray Fluorescence Spectroscopy
(XRF) revealed that the powder from this shell had a high Ca level, which increased at a higher
temperature. Fourier Transform Infrared Spectroscopy (FTIR) spectra agreed to an increase in Ca
level that showed the presence of CaO at 900 o
C and 1100 o
C; otherwise, CaCO3 disappeared. Using
Scanning Electron Microscopy (SEM), the powder morphology was more homogeneous at 900 o
C
and 1100 o
C than at lower temperatures. This morphology was encouraged by decreasing particle
size, indicating compound decomposition in the powder and Ca leaved. This decomposition was
confirmed by an Energy Dispersive X-ray Spectroscopy (EDS) analysis that showed increased Ca
content with higher mass and atomic level at a higher temperature
