Russian Journal of Physical Chemistry A

, Volume 90, Issue 3, pp 664–670 | Cite as

Thermodynamic characteristics of sorption extraction and chromatographic separation of anionic complexes of erbium and cerium with Trilon B on weakly basic anionite

  • O. V. Cheremisina
  • M. A. Ponomareva
  • V. N. Sagdiev
Physical Chemistry of Separation Processes: Chromatography


The adsorption of anionic complexes of erbium with Trilon B on D-403 anionite is studied at ionic strengths of 1 and 2 mol/kg (NaNO3) and temperatures of 298 and 343 K. The values of the stability constants of complex ions of REE with Trilon B and the Gibbs energies of complexation are calculated. The values of the Gibbs energy and the enthalpy and entropy of ion exchange are determined. Using the obtained thermo-dynamic and sorption characteristics, the possible separation of anionic complexes of erbium and cerium with Trilon B is demonstrated via frontal ion-exchange chromatography. A series of sorption capacities of anionic complexes of cerium, yttrium, and erbium is presented using the values of the Gibbs energy of ion exchange.


ethylenediaminetetraacetatoerbate ions ion exchange D-403 anionite linearization of the law of mass action frontal ion-exchange chromatography sorption separation of REEs series of REE sorption capacities thermodynamic potentials of ion exchange 


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© Pleiades Publishing, Ltd. 2016

Authors and Affiliations

  • O. V. Cheremisina
    • 1
  • M. A. Ponomareva
    • 1
  • V. N. Sagdiev
    • 1
  1. 1.National Mineral Resources (Mining) UniversitySt. PetersburgRussia

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