| Cenosphere | Red mud | Untreated | Heat treated |
Sample 1 | 0 | 0 | 62.55 | 70.04 |
Sample 2 | 2 | 2 | 64.64 | 72.39 |
Sample 3 | 4 | 2 | 66.83 | 76.84 |
Sample 4 | 6 | 2 | 69.14 | 82.52 |
Sample 5 | 8 | 2 | 71.70 | 86.65 |