Table 2 Inorganic composition of the precipitated silica obtained during the long-term operation experiment and rice husk ash
SiO2 | Al2O3 | CaO | MgO | Na2O | K2O | |
|---|---|---|---|---|---|---|
Precipitated silica (wt%) | 99.1 | 0.02 | 0.02 | 0.01 | 0.35 | 0.04 |
Rice husk ash (wt%) | 93.1 | 0.05 | 1.52 | 0.65 | 0.08 | 0.84 |