Dynamics of the sorption of copper(II) and silver(I) by materials based on sulfoethylchitosan with various degrees of crosslinking
- Authors: Petrova Y.S.1, Pestov A.V.1,2, Alifkhanova L.M.1, Neudachina L.K.1
-
Affiliations:
- Ural Federal University named after the first President of Russia B. N. Yeltsin
- Postovskii Institute of Organic Synthesis, Ural Branch
- Issue: Vol 91, No 4 (2017)
- Pages: 766-770
- Section: Physical Chemistry of Surface Phenomena
- URL: https://journals.rcsi.science/0036-0244/article/view/169431
- DOI: https://doi.org/10.1134/S0036024417040215
- ID: 169431
Cite item
Abstract
Optimum conditions of the dynamic concentration of copper(II) and silver(I) ions simultaneously present in a solution with N-(2-sulfoethyl)chitosan with a degree of modification equal to 0.5 and different degrees of crosslinking by glutaraldehyde are determined. The values of coefficients of selectivity KAg/Cu are determined under dynamic conditions. It is shown that the selectivity of the sorption of silver(I) increases (compared to copper(II)) as the degree of crosslinking of sorbents based on N-(2-sulfoethyl)chitosan is raised. Mathematical treatment of the obtained dynamic curves is performed according to the Thomas, Adams–Bohart, and Yoon and Nelson models. As a result, the values of dynamic capacity of sorbents, the rate constant of the reaction, and the release time of 50% of the sorbate are determined. The quantitative desorption of copper and silver from the surface of sorbents is achieved by using 1 mol/dm3 solution of nitric acid.
Keywords
About the authors
Yu. S. Petrova
Ural Federal University named after the first President of Russia B. N. Yeltsin
Author for correspondence.
Email: petrova.yu.s@mail.ru
Russian Federation, Yekaterinburg, 620002
A. V. Pestov
Ural Federal University named after the first President of Russia B. N. Yeltsin; Postovskii Institute of Organic Synthesis, Ural Branch
Email: petrova.yu.s@mail.ru
Russian Federation, Yekaterinburg, 620002; Yekaterinburg, 620137
L. M. k. Alifkhanova
Ural Federal University named after the first President of Russia B. N. Yeltsin
Email: petrova.yu.s@mail.ru
Russian Federation, Yekaterinburg, 620002
L. K. Neudachina
Ural Federal University named after the first President of Russia B. N. Yeltsin
Email: petrova.yu.s@mail.ru
Russian Federation, Yekaterinburg, 620002