Table 3.
Comparison of adsorption capacity and desorption efficiency for tested MNPs and amino-functionalized MNPs at optimal model solution pH for adsorbing Hg2+ ions.
| Adsorbent | HM Ions | Tested pH |
Adsorption Capacity | Desorption Efficiency | Reference |
|---|---|---|---|---|---|
| NH2-functionalized γ-Fe2O3 NPs (γ-Fe2O3@NH2 NPs) | Hg2+ | 4.0 | 16.2 mg/g | 100% | This work |
| CT-HPMNPs | 5.0 | 32.88 mg/g | ≅85% | [92] | |
| Rhodamine-hydrazide-modified Fe3O4 | 7.5 | 37.4 mg/g | - | [93] | |
| Nanocomposite based on Fe3O4 nanoparticles, chitosan nanoparticles, and polythiophene | 7.0 | 50 mg/g | - | [95] | |
| Fe3O4@SiO2-NH-HCG- (py) | 7.0 | 56 mg/g | 95% | [96] | |
| Fe3O4 nanoparticle coated with amino organic ligands and yam peel biomass | 7.0 | 60 mg/g | - | [94] | |
| Fe3O4@SiO2-NH-HCG- (pyd) | 7.0 | 77 mg/g | 95% | [96] | |
| NH2-functionalized γ-Fe2O3 NPs (γ-Fe2O3@NH2 NPs) | 7.0 | 85.6 mg/g | 100% | This work | |
| Armeniaca sibirica shell activated carbon (ASSAC) magnetized by nanoparticles (Fe3O4/ASSAC) | pH 2 | 97.1 mg/g | [97] | ||
| Activated carbon (XLAC) derived from Xanthoceras sorbifolia Bunge hull | pH 5.5 | 235.6 mg·g | [98] | ||
| Cadmium sulfide nanoparticles doped in a nanoadsorbent fabricated from polycaprolactam (nylon 6) nanofibers (CdS/N6) | pH 5 | 162 mg g | [99] |