Table 5. Comparison of Heavy-Metal-Ion Adsorption Capacity of Fe3O4@S-S/PMAA with Those of Reported Adsorbents.
| adsorption
capacity (mg·g–1) |
|||||||
|---|---|---|---|---|---|---|---|
| Adsorbents | Pb2+ | Co2+ | Zn2+ | Cd2+ | Cu2+ | Ni2+ | references |
| polypyrrole-modified magnetic Fe3O4/reduced graphene oxide composites | 60.9 | 8.4 | 30.2 | 12.1 | (28) | ||
| magnetic CA nanofibers | 44.1 | (29) | |||||
| hexadentate ligand-modified magnetic nanocomposites | 11.31 | 4.86 | 13.88 | 78.67 | 7.64 | (30) | |
| magnetic polydopamine-coated reduced graphene oxide composite | 35.2 | (31) | |||||
| lead-ion-imprinted magnetic biosorbent | 69.15 | (32) | |||||
| carboxymethyl–cyclodextrin polymer-modified Fe3O4 nanoparticle | 64.5 | 27.7 | 13.2 | (33) | |||
| magnetic ion-imprinted and −SH-functionalized polymer | 32.58 | (34) | |||||
| Fe3O4@S-S/PMAA | 48.7 | 25.1 | 18.1 | 22.4 | 19.9 | 21.5 | this work |