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

被引：6

作者：

Cheremisina, O. V. ^{[1
]}

Ponomareva, M. A. ^{[1
]}

Sagdiev, V. N. ^{[1
]}

机构：

[1] Natl Mineral Resources Min Univ, St Petersburg 199106, Russia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2016年 / 90卷 / 03期

关键词：

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;

D O I：

10.1134/S0036024416030079

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：664 / 670

页数：7

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