Green Synthesis and Characterization of Biosilica Produced from Sugarcane Waste Ash

Table 2

Chemical composition of sugarcane waste ash and synthesized biosilica.

Oxides	SWA (wt.%)	Biosilica (wt.%)
SiO2	81.60	99.1
Al2O3	7.94	0.33
Fe2O3	2.31	0.08
K2O	2.10	0.07
MgO	1.26	—
P2O5	1.07	—
CaO	0.98	0.03
TiO2	0.67	—
SO3	0.52	—
Cl	0.36	0.13
Na2O	0.26	0.22
MnO	0.06	—
Ta2O5	0.04	—
NiO	0.03	0.03
As2O3	0.03	—
CuO	—	<0.01
ZnO	—	<0.01
LI	0.79	—

LI = loss on ignition at 1050°C for one hour.