Table 1 DEX elemental analysis of raw bentonite, nano-bentonite and MgO-impregnated clay
Adsorbent | Element | Weight% |
|---|---|---|
Raw bentonite | C | 1.94 |
| Â | O | 51.001 |
| Â | Na | 2.750 |
| Â | Mg | 1.837 |
| Â | Al | 7.074 |
| Â | Si | 25.644 |
| Â | P | 0.274 |
| Â | K | 1.160 |
| Â | Ca | 3.580 |
| Â | Fe | 4.153 |
Nano-bentonite | O | 45.34 |
Mg | 31.94 | |
Al | 5.53 | |
Si | 12.94 | |
Fe | 4.24 | |
MgO-impregnated clay | O | 55.6 |
Al | 4.36 | |
Si | 40.03 |