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The estimation of the stability of ionite complexes formed in the sorption of copper cations by weakly alkaline AM-7 anionite

  • Physical Chemistry of Surface Phenomena
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Abstract

The sorption of copper cations by the complex-forming AM-7 anionite was studied. It was shown that the sorption of copper ions from aqueous solutions was satisfactorily described by the Langmuir equation. The linear approximation to this equation can be used to determine the maximum sorption capacity of the complex-forming anionite. Two independent methods for the determination of the characteristics of the ionite complex (the sorption capacity, stability constant, and coordination number) were considered: the determination of the stability constant from the distribution coefficient and from the data on the destruction of ammonia copper complexes brought in contact with the deprotonated ionite form. In both cases, the calculated stability constants of ionite complexes and the coordination numbers are in satisfactory agreement.

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Authors and Affiliations

  1. Obninsk State Technical University of Atomic Energetics, Obninsk, Kaluzhskaya oblast, Russia

    P. N. Chelnakova, V. A. Kolodyazhnyi & E. S. Volkova

Authors
  1. P. N. Chelnakova
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  2. V. A. Kolodyazhnyi
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  3. E. S. Volkova
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Correspondence to P. N. Chelnakova.

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Original Russian Text © P.N. Chelnakova, V.A. Kolodyazhnyi, E.S. Volkova, 2008, published in Zhurnal Fizicheskoi Khimii, 2008, Vol. 82, No. 12, pp. 2353–2357.

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Chelnakova, P.N., Kolodyazhnyi, V.A. & Volkova, E.S. The estimation of the stability of ionite complexes formed in the sorption of copper cations by weakly alkaline AM-7 anionite. Russ. J. Phys. Chem. 82, 2122–2125 (2008). https://doi.org/10.1134/S0036024408120261

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  • DOI: https://doi.org/10.1134/S0036024408120261

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