| Metals (ppm) | E1 | E2 | E3 | E4 |
| Cd | 0.13 | 0.17 | 0.11 | 0.09 |
| Co | 3.27 | 3.89 | 1.61 | 0.49 |
| Cr | 10.28 | 14.92 | 20.05 | 7.87 |
| Cu | 5.25 | 7.85 | 4.37 | 4.10 |
| Fe | 4354.83 | 9125.12 | 2777.83 | 1537 |
| Mn | 123.67 | 194 | 54.83 | 59.67 |
| Ni | 8.38 | 11.97 | 3.45 | 3.57 |
| V | 6.87 | 12.30 | 4.28 | 1.43 |
| Zn | 13.68 | 12.6 | 6.75 | 8.88 |
| Al | 4802 | 7935.33 | 2264.67 | 904.17 |