Adsorption of Ni(II), Cu(II), and Zn(II) ions by natural alumosilicate modified with N,N'-bis(3-triethoxysilylpropyl)thiocarbamide

Immobilization of N , N '- bis (3-triethoxysilylpropyl)thiocarbamide on the surface of natural alumosilicates from Eastern Transbaikal has been carried out. Adsorption isotherms of Ni(II), Cu(II), and Zn(II) ions on modified adsorbents have been plotted. The experimental data have been treated...

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Bibliographic Details
Published in:Protection of metals and physical chemistry of surfaces 2017-05, Vol.53 (3), p.416-421
Main Authors: Pomazkina, O. I., Filatova, E. G., Pozhidaev, Yu. N.
Format: Article
Language:English
Subjects:
Adsorption
Aluminum silicates
Characterization and Evaluation of Materials
Chemistry and Materials Science
Copper
Corrosion and Coatings
Free energy
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Ion exchange
Materials Science
Mathematical models
Metal ions
Metallic Materials
Nickel
Physicochemical Processes at the Interfaces
Surface chemistry
Tribology
Zinc
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Summary:Immobilization of N , N '- bis (3-triethoxysilylpropyl)thiocarbamide on the surface of natural alumosilicates from Eastern Transbaikal has been carried out. Adsorption isotherms of Ni(II), Cu(II), and Zn(II) ions on modified adsorbents have been plotted. The experimental data have been treated using the Langmuir, Freundlich, BET, and Dubinin–Radushkevich models. The constants of these equations have been determined. It has been shown that adsorption on alumosilicates modified with N , N '- bis (3-triethoxysilylpropyl)thiocarbamide is described in the best way by the Freundlich and Langmuir adsorption models. The Dubinin–Radushkevich model has been employed for the calculation of free energy of adsorption. For all the specimens under study, the free energy of adsorption indicates the presence of an ion-exchange mechanism, while the adsorption of heavy-metal ions has a chemical nature.
ISSN:2070-2051
2070-206X
DOI:10.1134/S2070205117030182