|
| Synthesis route | Magnetic source | Carbon source | As specie | Adsorption capacity (mg/g) | pH | T (°C) | Magnetization (emu/g) | BET area (m2/g) | Reference |
|
| Magnetic MWCNTs by microwave-assisted process | Fe3O4 and γ-Fe2O3 | Commercial MWCNTs | As3+
As5+ | 1.723
0.189 | 7
4 | 40 | -- | 153 | [49] |
| Magnetic CNTs by catalytic CVD vapor deposition with alkali-activated method | Fe3O4 and γ-Fe2O3 | Ethanol | As3+
As5+ | 8.13
9.74 | 5.5 | 25 | 27.2 | 662.1 | [119] |
| Sulfhydryl-functionalized MWCNTs with CVD synthesis and high-temperature treatment | Fe3O4 and γ-Fe2O3 | Ethanol | As3+ | 19.12 | 7 | 25 | 27.3 | 139.9 | [89] |
| Magnetic BC by thermal impregnation of biomass with natural hematite and direct pyrolysis procedure | γ-Fe2O3 | Pinewood | As5+ | 0.429 | 7 | 22 | -- | 193.1 | [24] |
| Magnetic GO by graphite exfoliation and coprecipitation | Fe3O4 | Graphite | As3+
As5+ | 54.18
26.76 | 8
5 | 25 | 12.8 | 70.20 | [189] |
| Magnetic MWCNTs by oxidation and coprecipitation | Fe3O4 | Commercial MWCNTs | As3+
As5+ | 14.26
16.85 | 6.8
3 | 30 | 39.37 | 119.09 | [91] |
| Magnetic RGO/CNT composites by graphite exfoliation and coprecipitation | Fe3O4 | Commercial MWCNTs and graphite | As3+
As5+ | 9.11
5.1 | 7 | 25 | -- | -- | [190] |
| Si-magnetic GO by graphite exfoliation and coprecipitation and sol-gel coated | Si-coated Fe3O4 | Graphite | As3+
As5+ | 7.5
11.41 | 4 | 25 | -- | -- | [191] |
| Aerogel magnetic CNCs by sol-gel impregnation and pyrolysis | Fe3C | Citric acid | As5+ | 56.2 | 7 | 25 | -- | 290 | [29] |
| Magnetic AC by impregnation using iron and manganese oxides | γ-Fe2O3 | Commercial AC | As5+ | 19.35 | 3 | 25 | 0.35 | 649.4 | [116] |
| Magnetic BC by hydrothermal impregnation and carbonization | Fe3O4 | Orange peel | As5+ | 81.3 | 6 | 2 | 45 | 396 | [23] |
| Magnetic CNCs by thermal impregnation with iron salts and pyrolysis method | Fe3C | Pine resin | As3+ | 263.9
356.6 | 7
4 | -- | -- | 177 | [33] |
| Magnetic AC by coprecipitation, impregnation and carbonization process | Fe3O4 | Cigarette soot | As3+
As5+ | 80.99
107.96 | 7
3 | 25 | 10.77 | 575.6 | [16] |
| Gelatin modified–magnetic BC by pyrolysis and impregnation by coprecipitation | γ-Fe2O3 | Chestnut shell | As5+ | 45.8 | 4 | 25 | 42 | -- | [25] |
| Magnetic CNCs by coprecipitation, impregnation, and hydrothermal synthesis | Fe3O4 | Glucose | As5+ | 20.05 | 1-2 | 25 | 35.1 | -- | [15] |
| Magnetic SWCNTs prepared by arc discharge evaporation | Fe3O4 and γ-Fe2O3 | Graphite | As5+ | 49.65 | 4 | 25 | -- | -- | [17] |
| Magnetic BC by thermal impregnation and pyrolysis with microwave heating | Fe3O4 | Empty fruit bunch from palm | As5+ | 88 | N. D. | 25 | -- | 890 | [26] |
| Calcium-based magnetic BC by coprecipitation impregnation and pyrolysis | Fe3O4 | Rice straw | As3+ | 6.34 | 5 | 25 | -- | -- | [27] |
| Magnetic CNTs by inverse coprecipitation and impregnation with Ni-Zn-ferrite | Ni-Zn-Ferrite | Commercial MWCNTs | As5+ | 66 | 2 | 25 | 15 | 214 | [92] |
| Magnetic GO by graphite exfoliation and coprecipitation and magnetic RGO reduced by hydrazine hydrate | Fe3O4 | Graphite | As5+ | 2-12 | 14 | 25 | 34 | 148.2 | [44] |
| 3D magnetic GO hydrogel by graphite exfoliation, coprecipitation, and one-pot method combining GO sheets, Fe3O4, and polyacrylamide hydrochloride | Fe3O4 | Graphite | As3+
As5+ | 25.1
74. 2 | 7.7
6.2 | 25 | 10.5 | -- | [192] |
| MWCNT membranes modified with CuFe2O4 by coprecipitation and using polyvinylidene fluoride (PVDF) membrane support | Cu ferrite | Commercial MWCNTs | As3+ | 31.25 | 7 | 25 | -- | -- | [50] |
| Chitosan magnetic GO by graphite exfoliation and coprecipitation | Fe3O4 | Graphite | As3+ | 45 | 7.3 | 25 | 49.3 | 152.38 | [120] |
| MGO by graphite exfoliation and coprecipitation | Fe3O4 | Graphite | As3+ | 99 | 3 | -- | -- | -- | |
| Multifunctionalized magnetic GO by coprecipitation and multiple impregnation | Fe3O4 | Commercial GO | As3+
As5+ | 62.7
19.3 | 7 | 25 | 23 | -- | [76] |
| 1,4-butane sultone modified magnetic AC by carbonization, activation, and finally magnetic impregnation with magnetic phase coprecipitated | Fe3O4 | Pistachio shell | As3+ | 151.51 | 5.5 | 25 | 11.6 | -- | [143] |
| Magnetic BC by coprecipitation, pyrolysis, and high-energy ball milling impregnation | Fe3O4 and γ-Fe2O3 | Slovak Lignite | As5+ | 19.9 | 3.9 | 25 | -- | 10.6 | [193] |
| HTC with iron salt followed by NaOH addition | FeCl3 | Olive pomace | As5+ | 3.5 | 5 | 25 | -- | -- | [194] |
| Pyrolysis and two step magnetization | γ-Fe2O3 | Corn straw | As5+ | 6.77 | 7 | 25 | 17.5 | 115.43 | [195] |
|
