| Adsorbents | Q (mg/g) | Reference | ||
| Cu(II) | Pb(II) | Zn(II) | ||
| DTS | 18.42 | 20.37 | 22.78 | This study |
| CC | 18.38 | 37.04 | 24.39 | This study |
| EFB | 26.95 | 37.59 | 21.19 | This study |
| Scoria | 27.81 | 33.46 | 22.66 | [3] |
| Moringa oleifera bark | - | 34.6 | - | [4] |
| Populous deltoids leaves | 17.76 | - | - | [9] |
| Syzygium cumini leaves | 15.87 | - | - | [9] |
| Eupatorium adenophorum spreng | - | 2.24 | - | [14] |
| Eichhornia crassipes | 32.51 | - | - | [17] |
| Chitosan-tripolyphosphate | 26.06 | 57.33 | - | [25] |
| Cereal chaff | - | 12.5 | - | [37] |
| Jujube complex bead | 3.64 | - | 2.93 | [38] |
| Modified carrot residues | 32.74 | - | 29.61 | [39] |
| Modified fir tree sawdust | 12.7 | 13.4 | [40] | |
| Modified poplar tree sawdust | 6.92 | - | 15.8 | [40] |
| Ulva lactuca biomass | - | 34.7 | - | [41] |