Research Article
Synthesis of CoFe2O4/Graphene Oxide-Grafted Tetraethylenepentamine for Removal of Cr (VI) from Aqueous Solution
Table 3
Comparison of adsorption capacity for removal of Cr (VI) on TGOM with other materials.
| | Adsorbent materials | pH | Kinetic model | Isotherm model | qm (mg/g) | Refs. |
| | Amine-functionalized polyacrylonitrilenanofiber (PAN-NH2) | pH = 2 | Pseudo-second-order | Langmuir | 156 | [39] | | Graphene-based adsorbent (ED-DMF-RGO) | pH = 2 | — | — | 92.15 | [46] | | Thiol-functional carbon (HT-SCY) | — | Pseudo-second-order | Langmuir | 15.41 | [47] | | Carboxyl-functional carbon (HT-AA) | — | Pseudo-second-order | Langmuir | 94.52 | [47] | | Amino-functional carbon (HT-N) | — | Pseudo-second-order | Langmuir | 171.23 | [47] | | Polyethylenimine-functionalized biosorbent (PEI-ESM) | pH = 3 | Pseudo-second-order | Langmuir | 160 | [48] | | Magnetic cyclodextrin-chitosan/graphene oxide (CCGO) | pH = 3 | Pseudo-second-order | Langmuir | 21.6 | [49] | | Graphenes magnetic material (Fe3O4-GS) | — | Pseudo-second-order | Freundlich | 17.29 | [50] | | Magnetite-polyethylenimine-montmorillonitematerial (Fe3O4--PEIx-MMT) | pH = 3 | — | Langmuir | 8.8 | [51] | | TGOM | pH = 2 | Pseudo-second-order | Langmuir | 114.81 | This work |
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