Table 8.
Desorption and reusability of various adsorbents for NRFX adsorption from aqueous media.
| Adsorbent | Elution agent | % qm after 1st cycle | Number of cycles (n) | % qm retained after n cycles | Refs. |
|---|---|---|---|---|---|
| Magnetic halloysite nanotubes/molecularly imprinted polymer composite | – | 90.30 | 7 | 85.60 | [109] |
| Molecularly imprinted polymer | HCOOH/CH3OH (1:1) | 90.00 | 6 | ˃ 85.00 | [81] |
| Amino-functionalized Zr-based MOF | 0.1 mol/L NaOH | ˃ 95.00 | 5 | ˃ 80.00 | [9] |
| Nitrogen-rich Calotropis gigantean fiber | 0.1 mol/L NaOH | – | 5 | ˃ 75.00 | [125] |
| 3D peanut shell/graphene oxide | C2H5OH(aq) | 89.73* | 5 | 77.52* | [118] |
| Natural attapulgite-potato stem hybrid biochar | CH3OH | 84.20 | 5 | 82.00 | [10] |
| Sawdust biochar/Al2(SO4)3-modified thermal kaolin | CH3OH/H2O | – | 5 | 80.20 | [1] |
| Amine-functionalized magnetic bamboo-based AC | C2H5OH(aq) | – | 5 | 80.00 | [34] |
| Molecularly imprinted silica polymer | CH3OH/ CH3COOH (9:1 v/v) | – | 4 | 97.10 | [140] |
| Magnesium oxide/Chitosan/Graphene oxide | CH3OH | – | 4 | ˃ 80.00 | [92] |
| Surface-imprinted polymer microsphere | CH3OH/ CH3COOH | 83.20* | 4 | 77.48* | [119] |
| Magnetic molecularly imprinted polymer composite | CH3OH/ CH3COOH | 90.00 | 4 | 75.50 | [132] |
| Graphene oxide/MOF based composite | C2H5OH/HCl (10:1) | 93.61 | 3 | 88.40 | [83] |
| Layered chalcogenide | 1.0 M KCl | 95.00 | 3 | ˃ 90.00 | [115] |
| Magnetic potato stems and leaves biochar-based manganese oxide composite | – | 98.00 | 3 | 95.00 | [138] |
⁎
= mg/g.