Adsorption performances of some reported adsorbents in removing CR and RR2 dyes.
| Dye | Adsorbents | pH | Temp (°C) | q max (mg g−1) | Reference |
|---|---|---|---|---|---|
| CR | SBA-15/AmBenS | 6–7 | 25 | 64.3 | 28 |
| SBA-15-NH2 | 4 | 40 | 230.9 | 35 | |
| SBA-15-COOH | 9 | 40 | 133.9 | 35 | |
| Hierarchical porous NiFe-LDO | 6–7 | 30 | 330 | 26 | |
| Si-MCM-41 | 4 | 40 | 87.4 | 22 | |
| Si-MCM-41-PEI | 4 | 40 | 458.72 | 24 | |
| SBA-15-BOP | 6–7 | 25 | 518.1 | This study | |
| RR2 | RPB–Fe3O4 nanoparticles | 3 | 25 | 97.8 | 21 |
| BIO-sludge | 2 | 25 | 213.9 | 15 | |
| PC-sludge | 2 | 25 | 159.3 | 15 | |
| CFA-PEI | 2 | 40 | 316.8 | 16 | |
| Si-MCM-41 | 2 | 35 | 60.2 | 22 | |
| SBA-15-BOP | 6–7 | 25 | 253.8 | This study |