Extreme adsorption capacity for some metal oxide nanomaterials to deduce diverse dyes and heavy metals.
| Adsorbent | Contaminant | Adsorption capacity (mg g−1) | Ref. |
|---|---|---|---|
| MgO | Indanthren blue | 86.50 | 63 |
| MgO | Levafix fast red CA | 92.16 | 63 |
| MgO | Reactive brilliant red X3B | 277.78 | 225 |
| MgO | Congo red | 303.03 | 225 |
| TiO2 | Cr6+ | 12.60 | 226 |
| TiO2 | Pb2+ | 21.70 | 227 |
| TiO2 | Ni2+ | 39.30 | 227 |
| Al2O3 | Pb2+ | 41.20 | 227 |
| Al2O3 | Ni2+ | 35.90 | 227 |
| Al2O3 | Cu2+ | 47.90 | 227 |
| TiO2 | Cu2+ | 50.20 | 227 |
| MnO2/gelatin | Cd2+ | 105.10 | 228 |
| Al2O3 | Cd2+ | 118.90 | 227 |
| TiO2 | Cd2+ | 120.10 | 227 |
| MgO | Cd2+ | 135.00 | 227 |
| MgO | Pb2+ | 148.60 | 227 |
| MgO | Cu2+ | 149.10 | 227 |
| MgO | Ni2+ | 149.90 | 227 |
| MnO2/gelatin | Pb2+ | 318.70 | 228 |
| ZnO | Zn2+ | 357.00 | 229 |
| ZnO | Cd2+ | 387.00 | 229 |
| ZnO | Hg2+ | 714.00 | 229 |