Table 1.
Graphene-based Nanoadsorbents and Membranes.
| Graphene-based system | Features | Adsorption capacity or rejection | References |
|---|---|---|---|
| GO | GO as adsorbent | As(III) 288 mg/gF | Reynosa-Martínez et al., 2020 |
| PEI-GO | GO modified with PEI Solid Phase Extraction | As(III) 125 mg/gE | Ahmad et al., 2018 |
| GO@SiO2 and G@SiO2 | GO or G and SiO2 as chromatographic stationary phases | Not specified | Cheng et al., 2018 |
| M-GO | GO, Fe3O4 nanocomposite as adsorbent | As(III) 85 mg/gE
As(V) 38 mg/gE |
Yoon et al., 2016 |
| M-RGO | RGO, Fe3O4 nanocomposite as adsorbent | As(III) 57 mg/gE
As(V) 12 mg/gE |
Yoon et al., 2016 |
| β-CDs-GO@Fe3O4 | GO modified with β-CDs, Fe3O4 nanocomposite as adsorbent | As(III) 100.23 mg/gE
As(V) 99.51 mg/gE |
Kumar and Jiang, 2017 |
| CMGO | Chitosan-magnetic-graphene oxide, nanocomposite as adsorbent | As(III) 45 mg/gE | Sherlala et al., 2019 |
| mGO/bead | Alginate, GO, Fe3O4 nanocomposite as adsorbent | As(V) ~99%E | Vu et al., 2017 |
| GFeN | GO and Fe/FexOy core-shell as adsorbent | As(III) 306 mg/gL
As(V) 431 mg/gL |
Das et al., 2020 |
| Mag-PRGO | Partially reduced GO and Fe3O4 nanocomposite as adsorbent | As(V) 132 mg/gE | Bobb et al., 2020 |
| SMG | G, Fe (~5 nm) nanocomposite as adsorbent | As(V) 3.26 mg/gL | Gollavelli et al., 2013 |
| GNP/Fe-Mg | G nanoplates, Fe-Mg nanocomposite as adsorbent | As(V) 103.9 mg/gL | La et al., 2017b |
| GNP/CuFe2O4 | G nanoplates, CuFe2O4 nanocomposite as adsorbent | As(III) 236.29 mg/gL
As(V) 172.27 mg/gL |
La et al., 2017a |
| Fe@CuO&GO | Fe/Cu/GO nanocomposite as adsorbent | As(III) 70.36 mg/gL
As(V) 62.60 mg/gL |
Wu et al., 2019 |
| Fe-GO-Gd | Gd2O3, Fe2O3, GO nanocomposite as adsorbent | As(V) 35.84 mg/gE | Lingamdinne et al., 2020 |
| MG@PDA@PGMA-AET | G/Fe3O4, Polydopamine, 2-aminoethanethiol as adsorbent | As(III) 62.7 mg/gE
As(V) 19.3 mg/g E |
Wang et al., 2019 |
| M-RGO | Fe2O3 NPs, persulfate (PS) and RGO as catalyst/adsorbent | Total As 89.8%E | Wu et al., 2020 |
| MAF-RGO | Mn-Al-Fe and RGO as adsorbent | As(III) 402 mg/gF
As(V) 339 mg/gF |
Penke et al., 2020 |
| G-CNT-Fe 3D | Engineered G, CNT Fe3O4 | Not specified | Vadahanambi et al., 2013 |
| 3D G Fe3O4/aerogel | Fe3O4/graphene aerogel as adsorbent | As(V) 40.048 mg/gL | Ye et al., 2015 |
| MGOH | Graphene hydrogel as adsorbent | As (III) 25.1 mg/gL
As(V) 74.2 mg/gL |
Liang et al., 2019 |
| FeOx-CNs | Engineered carbon nanospheres-iron oxide | As (III) 416 mg/gF
As(V) 201 mg/gF |
Su et al., 2017b |
| PSU-GO | Membrane produced by phase inversion, used in direct flow filter | As(V) 82.3%E | Rezaee et al., 2015 |
| PSU-GO | Membrane produced by phase inversion, used in cross-flow filter | As(V) 99%E | Shukla et al., 2018 |
| GO-coated TFC-NF | PES-supported membrane produced by GO covalent coating on Polyamide, used in cross-flow filter | As(V) 98%E | Pal et al., 2018a,b |
| PAN-GO-γ-Fe2O3 | Membrane produced by electrospinning used as batch adsorption | As(V) 95.72%E | Tripathy and Hota, 2019 |
| PES-GMF | Produced by phase inversion, used in cross-flow filter | As(V) 28.70 mg/gE | Shahrin et al., 2019 |
| PGLa-Glu-GO-CNT | Membrane produced by spin-casting | As(V) 92%E
As(III) 96%E |
Viraka Nellore et al., 2015 |
| PLGO | Membrane produced by filtration over cellulose, used as fix-bed adsorption column | As(III) 99.8%E | Ahmad et al., 2020 |
| DMSPE | Adsorbent deposited on membrane, used in direct flow filter | As(V) 43.9 mg/gL | Baranik et al., 2018 |
F
Freundlich model;
L
Langmuir model;
E
Experimental.