Comparison of adsorption properties of various adsorbents for the removal of Cu(ii), Zn(ii) and Pb(ii) from the aqueous solution.
| Materials | Adsorption capacity (mg g−1) | |||
|---|---|---|---|---|
| Cu(ii) | Zn(ii) | Pb(ii) | References | |
| Chitosan–cellulose beads | 53.2 | — | — | 58 |
| Glycidyl methacrylate–cellulose | 70.4 | — | 84.9 | 20 |
| PGMA | 69.6 | — | 52.0 | 60 |
| Pyromellitic dianhydride modified SCB | 77.4 | 65.0 | 219.6 | 61 |
| SiO2-G2 | — | — | 165.8 | 48 |
| Triethylenetetramine functionalized cellulose acetate–manganese dioxide composite | — | — | 196.8 | 62 |
| Alginate beads | 95.3 | — | — | 63 |
| Magnetic chitosan/cellulose microspheres | — | — | 45.9 | 64 |
| TEPA modified chitosan/CoFe2O4 | 168.1 | — | 228.3 | 65 |
| Fe3O4/CS NPs | — | — | 79.2 | 66 |
| CSTEC | 95.2 | — | 144.9 | 67 |
| CA/TiO2 | 23.0 | — | 25.0 | 68 |
| PEI-RCSA | 177.1 | 110.2 | 234.2 | This work |