Quartz Sand Treatment | Solubility in H2O (%) | Extractable Si (%) |
Untreated (origin) | 0 |
|
HCl-washed and boiled (A) | 0 | 0.0060 - 0.0073 (0.0067 ± 0.0007) |
A + NaOH (s)-mixed and heated | 79.5 | 11.7670 - 12.2000 (11.9835 ± 0.2165) |