Table 3.
Metal removal by different sorbents in the literature.
| Sorbents | Experimental Conditions | Sorption Capacity (mg g−1) Pb(II) | Sorption Capacity (mg g−1) Ni(II) | References |
|---|---|---|---|---|
| Silica gel (SG) Modified silica gel (S2A) |
pH = 2.0 | 0.72 - |
0.34 0.95 |
[18] |
| Kaolinite Acid-activated kaolinite |
pH = 7.0 | 11.10 12.10 |
10.40 11.90 |
[47] |
| Mesoporous activated carbon adsorbent | pH = 7.0 | 20.32 | - | [49] |
| EIRs | pH = 1.0 | 80.00 | - | [52] |
| 4-amino-2-mercaptopyrimidine modified silica gel | pH = 3.0 | 80.20 | - | [17] |
| Fe3O4-SO3H MNPs | pH = 7.0 | 108.93 | - | [53] |
| ChiFer(III) | pH = 4.5 | 116.03 | - | [54] |
| Amorphous manganese oxide (AMO) | pH = 4.0 pH = 5.5 |
124.32 125.15 |
- - |
[50] |
| CAM-D2EHPA | pH = 4.0 | 197.26 | 44.36 | [This work] |
| AF-PEI A-PEI |
pH = 4.0 | 225.85 229.99 |
60.45 48.71 |
[16] |
| XAD-2-Cyanex 272 XAD-2-Cyanex 302 |
pH = 2.0 | - | 6.49 3.65 |
[48] |
| Free dead algal cells Blank alginate beads Immobilized dead algal cells |
pH = 5.0 | - - - |
13.90 25.60 31.30 |
[51] |
| Activated carbon Irradiation grafted Activated carbon |
pH = 7.0 | - - |
44.10 55.70 |
[55] |
| Raw poplar (trunk) Torrefied poplar (250 °C, 75 min) Torrefied poplar (280 °C, 60 min) |
pH = 4.0 pH = 4.0 pH = 4.0 |
28.50 27.55 30.89 |
- - - |
[56] |