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Dynamics of the sorption of copper(II) and silver(I) by materials based on sulfoethylchitosan with various degrees of crosslinking

  • Physical Chemistry of Surface Phenomena
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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 K Ag/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.

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Authors and Affiliations

  1. Ural Federal University named after the first President of Russia B. N. Yeltsin, Yekaterinburg, 620002, Russia

    Yu. S. Petrova, A. V. Pestov, L. M. k. Alifkhanova & L. K. Neudachina

  2. Postovskii Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620137, Russia

    A. V. Pestov

Authors
  1. Yu. S. Petrova
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  2. A. V. Pestov
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  3. L. M. k. Alifkhanova
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  4. L. K. Neudachina
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Corresponding author

Correspondence to Yu. S. Petrova.

Additional information

Original Russian Text © Yu.S. Petrova, A.V. Pestov, L.M.k. Alifkhanova, L.K. Neudachina, 2017, published in Zhurnal Fizicheskoi Khimii, 2017, Vol. 91, No. 4, pp. 720–724.

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Petrova, Y.S., Pestov, A.V., Alifkhanova, L.M.k. et al. Dynamics of the sorption of copper(II) and silver(I) by materials based on sulfoethylchitosan with various degrees of crosslinking. Russ. J. Phys. Chem. 91, 766–770 (2017). https://doi.org/10.1134/S0036024417040215

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  • DOI: https://doi.org/10.1134/S0036024417040215

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