| Materials | Quantity adsorbed at equilibrium | References |
| Gelatin/activated carbon composite beads (GE/AC) | 256.41 mg/g | [56] |
| Zinc chloride/ferric chloride activation | 371 mg/g | [57] |
| Coconut Shell Activated Carbon/CoFe2O4 Composite (CAC) | 94.08 mg/g | [58] |
| WO3/Activated carbon composite (WO3/AC) | 797.9 mg/g | [59] |
| Polyethylene Terephthalate Activated Carbon (PETAC) | 75.575 mg/g | Present work |
| Canarium schweinfurthii/Polyethylene Terephthalate Activated Carbon (CS/PETAC) | 98.213 mg/g | Present work |