Optimization of Milling Procedures for Synthesizing Nano-CaCO₃ from Achatina fulica Shell through Mechanochemical Techniques

Table 1

Elemental composition of the raw snail shell and synthesized Nano-CaCO₃.

Elemental composition	Raw snail shell (wt.%)	E (wt.%)	ED (wt.%)	M (wt.%)	W (wt.%)
C	36.71	29.45	27.43	18.43	50.63
O	22.25	48.98	51.52	50.41	38.42
Ca	40.44	21.58	21.05	31.16	10.95
Calcium carbonate (wt.%)
Other metal oxides		—	—	—	—