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| adsorbent | adsorption capacity (mg/g) | removal efficiency (%) | refs |
|---|---|---|---|
| activated carbon | 7.4 | 50 | (42) |
| nanosilica with surface modification by a polyelectrolyte | 7.5 | 92 | (44) |
| chitosan beads | 8.7 | NF | (25) |
| bentonite | 18.8 | 88 | (41) |
| ZnO@SiO2-based rice husk | 52.1 | 90 | this study |
NF: no information.
