Table 4.
Maximum adsorption capacities of various adsorbents towards RB5 and CR dyes.
| Adsorbent | Maximum adsorption capacity (mg/g) | |
|---|---|---|
| RB5 | CR | |
| PEI-CW (Present work) | 77.5 | 34.4 |
| Dolomite50 | 72.4 | 229.2 |
| Banana peel powder39 | 49.2 | 164.6 |
| Hierarchical magnesium oxide (MgO) incorporated fly ash (FA) composite51 | 48.8 | — |
| Zerovalent iron nanoparticles combined with Macrocystis pyrifera biomass41 | 39.9 | — |
| Magnetic iron oxide nanoparticle52 | 18.0 | — |
| MoO2/CaSO4 composites53 | — | 853.5 |
| Hierarchical C/NiO-ZnO nanocomposite54 | — | 613.0 |
| Hydroxyapatite nanoparticles loaded on Zein55 | — | 416.7 |
| Amine-modified Funalia trogii biomass56 | — | 193.7 |
| Pineapple plant stem57 | — | 12.0 |