Zinc-Wool Keratin Reactions in Nonaqueous Solvents

1974 ◽  
pp. 81-95 ◽  
Author(s):  
N. H. Koenig ◽  
Mendel Friedman
Keyword(s):  
Nonaqueous Solvents ◽  
Wool Keratin

scholarly journals Magnetically Recyclable Wool Keratin Modified Magnetite Powders for Efficient Removal of Cu2+ Ions from Aqueous Solutions

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1068
Author(s):  
Xinyue Zhang ◽  
Yani Guo ◽  
Wenjun Li ◽  
Jinyuan Zhang ◽  
Hailiang Wu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Ion Concentration ◽  
Bet Surface Area ◽  
Chemical Compositions ◽  
Ion Adsorption ◽  
X Ray ◽  
Wool Keratin

The treatment of wastewater containing heavy metals and the utilization of wool waste are very important for the sustainable development of textile mills. In this study, the wool keratin modified magnetite (Fe3O4) powders were fabricated by using wool waste via a co-precipitation technique for removal of Cu2+ ions from aqueous solutions. The morphology, chemical compositions, crystal structure, microstructure, magnetism properties, organic content, and specific surface area of as-fabricated powders were systematically characterized by various techniques including field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM), thermogravimetric (TG) analysis, and Brunauer–Emmett–Teller (BET) surface area analyzer. The effects of experimental parameters such as the volume of wool keratin hydrolysate, the dosage of powder, the initial Cu2+ ion concentration, and the pH value of solution on the adsorption capacity of Cu2+ ions by the powders were examined. The experimental results indicated that the Cu2+ ion adsorption performance of the wool keratin modified Fe3O4 powders exhibited much better than that of the chitosan modified ones with a maximum Cu2+ adsorption capacity of 27.4 mg/g under favorable conditions (0.05 g powders; 50 mL of 40 mg/L CuSO4; pH 5; temperature 293 K). The high adsorption capacity towards Cu2+ ions on the wool keratin modified Fe3O4 powders was primarily because of the strong surface complexation of –COOH and –NH2 functional groups of wool keratins with Cu2+ ions. The Cu2+ ion adsorption process on the wool keratin modified Fe3O4 powders followed the Temkin adsorption isotherm model and the intraparticle diffusion and pseudo-second-order adsorption kinetic models. After Cu2+ ion removal, the wool keratin modified Fe3O4 powders were easily separated using a magnet from aqueous solution and efficiently regenerated using 0.5 M ethylene diamine tetraacetic acid (EDTA)-H2SO4 eluting. The wool keratin modified Fe3O4 powders possessed good regenerative performance after five cycles. This study provided a feasible way to utilize waste wool textiles for preparing magnetic biomass-based adsorbents for the removal of heavy metal ions from aqueous solutions.

Solvation numbers in nonaqueous solvents

1974 ◽  
Vol 78 (5) ◽  
pp. 556-557 ◽  
Author(s):  
Arden P. Zipp
Keyword(s):  
Nonaqueous Solvents ◽  
Solvation Numbers

Ionic liquids as novel solvents for the dissolution and blending of wool keratin fibers

2005 ◽  
Vol 7 (8) ◽  
pp. 606 ◽  
Author(s):  
Haibo Xie ◽  
Shenghai Li ◽  
Suobo Zhang
Keyword(s):  
Ionic Liquids ◽  
Keratin Fibers ◽  
Wool Keratin

Molecular associations in nonaqueous solvents. I. Thermodynamics of dye-dye interactions in carbon tetrachloride and benzene

1973 ◽  
Vol 18 (3) ◽  
pp. 277-279 ◽  
Author(s):  
Richard C. Graham ◽  
Gary H. Henderson ◽  
Edward M. Eyring ◽  
Earl M. Woolley
Keyword(s):  
Carbon Tetrachloride ◽  
Nonaqueous Solvents ◽  
Molecular Associations

Applications of potentiometric ion sensors in the characterization of nonaqueous solvents

1990 ◽  
Vol 90 (5) ◽  
pp. 827-835 ◽  
Author(s):  
J. F. Coetzee ◽  
B. K. Deshmukh ◽  
C. C. Liao
Keyword(s):  
Nonaqueous Solvents ◽  
Ion Sensors ◽  
Potentiometric Ion Sensors
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