TABLE 2.
Elemental concentration in weight percentages obtained through scanning electron microscopy–energy‐dispersive X‐ray spectroscopy (SEM‐EDX) analysis
| Samples | O | Si | Pb | Al | Fe | C | K | Ca | Zn | Na | Mg | Cu | Co | Sn | Ni | Mo | Cr | Ti | As |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GL 1 | 28.93 | 16.38 | 14.28 | 6.16 | 4.78 | 0 | 1.5 | 3.52 | 1.24 | 0.95 | 1.24 | 1.57 | — | 3.68 | 0.66 | — | 0.87 | 0.66 | 0.47 |
| GL 2 | 31.26 | 17.16 | 11.33 | 6.01 | 3.31 | 2.66 | 2.4 | 2.25 | 1.82 | 1.78 | 1.57 | 1.38 | 1.33 | 1.1 | 1.08 | 0.98 | 0.76 | 0.71 | 0.7 |
| GR 1 | 29.57 | 11.06 | 9.77 | 4.26 | 2.91 | 4.44 | 0.82 | 11.82 | 0.88 | — | 1.05 | 0.55 | 0.84 | 7.86 | 0.42 | 0.56 | 0.65 | 0.64 | 0.41 |
| GR 2 | 33.59 | 6.55 | 8.8 | 3.79 | 1.96 | 2.16 | 1.18 | 16.18 | 0.68 | — | 0.99 | 0.67 | — | 11.23 | — | 0.67 | 0.57 | 0.5 | 0.46 |