Table 3.
Comparative studies of the Cr(VI) adsorption capacity of CB18crown6/SBA-15 with other related sorbents.
| Adsorbents * | Adsorbates | Adsorption Capacity (mg/g) |
References |
|---|---|---|---|
| BC 1 | Cr(VI) | 21.3 | [33] |
| 4-VP/HEMA-grafted PET 2 | Cr(VI) | 81.0 | [34] |
| PyR resin 3 | Cr(VI) | 94.3 | [35] |
| SGE-10/12-en 4 | Cr(VI) | 109.7 | [36] |
| AFC-coated silica gel 5 | Cr(VI) | 65.0 | [37] |
| SBA/SA 6 | Cr(VI) | 66.7 | [38] |
| SBA-TMPED 7 | Cr(VI) | 55.0 | [39] |
| PPy/SBA-15 8 | Cr(VI) | 194.2 | [40] |
| PD/MCM-41 9 | Cr(VI) | 70.9 | [41] |
| CB18crown6/SBA-15 | Cr(VI) | 86.0 | This work |
* (Note: a brief explanation of the above samples is summarized as follows). 1 BC: wheat-residue-derived black carbon; 2 4-VP/HEMA-grafted PET: 4-vinly pyridine (4-VP) and 2-hydroxyethylmethacrylate (HEMA) monomer graft onto poly(ethylene terephthalate) (PET) fibers; 3 PyR resin: 4-vinylpyridine:divinylbenzene copolymer of gel structure with 2-chloroacetamide; 4 SGE-10/12-en: functionalization of poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) with ethylene diamine; 5 AFC-coated silica gel: aniline-formaldehyde-condensate-coated silica gel; 6 SBA/SA: SBA-15 mesoporous materials modified with N-propylsalicylaldimine groups; 7 SBA-TMPED: SBA-15 functionalized with N-[3-(trimethoxysilyl)propyl]-ethylenediamine (TMPED); 8 PPy/SBA-15: monodisperse polypyrrole/SBA-15; 9 PD/MCM-41: MCM-41 silica coated on the processed diatomite.