Research Article
Polyurethane-Keratin Membranes: Structural Changes by Isocyanate and pH, and the Repercussion on Cr(VI) Removal
Table 3
Keratin as biosorbent or functional component in materials applied in removal of metal pollution from water.
| | Material Description | Metallic species removed | Maximum removal | Keratin included | Reference |
| | Polyurethane-feather keratin solution membrane | Cr(VI) | 57% | 0.2 g (1.75%) | This paper | | Polyurethane-feather keratin biofiber membrane | Cr(VI) | 38% | 15% | [6] | | Feather fibers | Pb(II) | 81.6% | 100% | [4] | | Wool keratin/polyamide 6 nanofibres | Cu(II) | 97% | 90% | [27] | | Feather fibers | Cu(II) | 0.77 mmol/g | 100% |
[28] | | Zn(II) | 0.95 mmol/g | | Membrane of wool keratose/silk fibroin blend | Cu(II) | 2.88 g/cm3 | 50% | [29] | | Algerian sheep hoof powder | Hg(II) | 68 mg/g | 100% | [30] | | Chicken feather aminoacid solution immobilized on silica surfaces | Ca | 93.88% | 1 g |
[9] | | Mg | 72.55% | | Fe | 97.13% | | Mn | 95.66% | | Feather fibers | Pb | 100% | 100% |
[8] | | Cu | 48.8% | | Zn | 3.8% | | Cd | 17.0% | | Ni | 10.9% | | Chicken feather alkaline solution | Cu | 0.14 mmol/g | 5 mg/cm3 |
[31] | | Zn | 0.17 mmol/g |
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