Table 4.
Comparison of adsorption capacity of Mn(II) onto various adsorbents.
| Adsorbent | Adsorption capacity (mg g−1) |
pH | References |
|---|---|---|---|
| Granular activated carbon | 2 | 7 | 56 |
| Surfactant modified alumina | 2.04 | 4.04–8.05 | 11 |
| Palm fruit bunch | 2.21 | N/A | 59 |
| Amberlite IR-120H | 4.9 | 7 | 56 |
| Natural zeolite | 7.68 | 6 | 60 |
| Polyvinyl alcohol/chitosan (PVA/CS) hydrogel | 10.515 | 5 | 10 |
| Activated carbon from bean pods waste | 23.4 | 5–6 | 61 |
| Al-zeolite | 25.12 | 6 | 60 |
| Mesoporous carbons | 40 | 7 | 62 |
| Graphene oxide/Sodium alginate beads | 56.49 | 6 | This study |