Table 2.
Elemental analysis of RHA.
| Element | Weight% | Atomic% |
|---|---|---|
| O | 34.07 | 48.47 |
| Na | 0.13 | 0.13 |
| Mg | 1.39 | 1.30 |
| Al | 1.21 | 1.02 |
| Si | 51.61 | 41.82 |
| P | 4.27 | 3.14 |
| K | 3.70 | 2.15 |
| Ca | 3.09 | 1.76 |
| Fe | 0.53 | 0.22 |
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