Analytical chemistry council

METHODS AND OBJECTS OF CHEMICAL ANALYSIS

(Metody i Ob''ekty Himicheskogo Analiza)

An international journal devoted to all aspects of Analytical chemistry

ISSN 2413-6166 (Online), ISSN 1991-0290 (Print)

Kiev University
 

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Recovery of Lanthanide Ions on Silica Adsorbent with Covalently Immobilized Derivative of 2,6-Pyridinedicarboxylic acid

Olena Artiushenko, Vladimir Zaitsev*, Wendy Sandoval, Tatiana D. Saint´Pierre

* Corresponding authors

Pontifical Catholic University of Rio de Janeiro, Marquês de São Vicente St., 225, Rio de Janeiro, Brazil, 22451-900;

*e-mail: vnzaitsev@puc-rio.br

Methods Objects Chem. Anal., 2018, 13(4), p. 192-199

https://doi.org/10.17721/moca.2018.192-199

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Abstract

Adsorption conditions of 14 lanthanide ions (Ln) on silica-based adsorbent with immobilized derivative of 2,6-pyridinedicarboxylic acid (SiO2-PdCA) were studied. It has been demonstrated that SiO2-PdCA quantitatively removes all lanthanides from their multi-element aqueous solution at pH ≥ 2.5. Solutions of strong mineral acids and several complexing agents, such as EDTA, 5-sulfosalicylic, citric, α-hydroxyisobutyric, and ascorbic acids were investigated as eluents. It was demonstrated that complete (90-100 %) elution of lanthanides from SiO2-PdCA can only be achieved with 2 mol L-1 HNO3 acid, while 0.01 mol L-1 EDTA solution elutes up to 90 % of light and 100 % of heavy Ln3+. Reusability tests demonstrate that SiO2-PdCA reversibly adsorbs Ln ions, and after five successive adsorption/desorption cycles no decrease in the adsorption capacity of SiO2-PdCA was detected.

Keywords: complexing adsorbents, pre-concentration, lanthanides, desorption

Article language: Rus


Publisher:Taras Shevchenko National University, Kiev Ukraine

(Analytical chemistry department at Taras Shevchenko National University, 64 Vladimirskaya STR., Kiev, 01601 UKRAINE)
analysis@univ.kiev.ua, www.achem.univ.kiev.ua, +380-44-2393345

Papers published in Methods and Objects of Chemical Analysis are considered as publications suitable for PhD thesis

The journal website: www.moca.net.ua