METHODS AND OBJECTS OF CHEMICAL ANALYSIS
ISSN title: "Metody i obʺekty himičeskogo analiza"
An international journal devoted to all aspects of Analytical chemistry
ISSN 2413-6166 (Online), ISSN 1991-0290 (Print)
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METHODS AND OBJECTS OF CHEMICAL ANALYSIS ISSN title: "Metody i obʺekty himičeskogo analiza" An international journal devoted to all aspects of Analytical chemistry ISSN 2413-6166 (Online), ISSN 1991-0290 (Print) |
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Recovery of Lanthanide Ions on Silica Adsorbent with Covalently Immobilized Derivative of 2,6-Pyridinedicarboxylic acid |
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* 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 |
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Methods Objects Chem. Anal., 2018, 13(4), p. 192-199 |
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Buy Article: 2 USD plus tax |
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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.univ.kiev.ua,
+380-44-2393266
The journal is indexed in SCOPUS and Web of Science
The journal website: www.moca.net.ua
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CC BY 4.0
