Nanostructured Magnetic Sorbents for Selective Recovery of Uranium(VI) from Aqueous Solutions
- Authors: Papynov E.K.1,2, Tkachenko I.A.1, Maiorov V.Y.1, Pechnikov V.S.2, Fedorets A.N.2, Portnyagin A.S.1,2, Dran’kov A.N.1,2, Buravlev I.Y.1,2, Grishin A.V.2, Tananaev I.G.1,2,3, Avramenko V.A.1,2
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Affiliations:
- Institute of Chemistry, Far Eastern Branch
- Far Eastern Federal University
- Frumkin Institute of Physical Chemistry and Electrochemistry
- Issue: Vol 61, No 1 (2019)
- Pages: 28-36
- Section: Article
- URL: https://ogarev-online.ru/1066-3622/article/view/224885
- DOI: https://doi.org/10.1134/S1066362219010053
- ID: 224885
Cite item
Abstract
Direct sol-gel, novel template, and additional high-temperature reduction procedures for preparing iron oxides and their composites, showing promise for selective sorption of dissolved U(VI) from aqueous media of various acidities, are described. The sorption activity of the materials was studied, the kinetic curves of the sorption were obtained, and the efficiency of the selective recovery of U(VI) from aqueous solutions with different pH values using the new sorbents was compared. The probable mechanism of the U(VI) sorption onto the sorbents studied was suggested on the basis of SEM, XPS, emf, and BET data. The quantitative sorption of U(VI) is determined to a greater extent by the composition of the sorbent solid phase, rather then by the specific surface area of the sorbents, which ranges from 0.1 to 47.3 m2 g−1 depending on the synthesis procedure. The crystalline Fe0 phase in the sorbents prepared using additional high-temperature reduction plays the key role in the U(VI) sorption by the reducing deposition mechanism. The saturation magnetization for this type of sorbents can reach 133–140 emu g−1, which is an additional advantage allowing magnetic separation of the spent sorbents from the treated solutions.
About the authors
E. K. Papynov
Institute of Chemistry, Far Eastern Branch; Far Eastern Federal University
Author for correspondence.
Email: papynov@mail.ru
Russian Federation, pr. 1000-letiya Vladivostoka 159, Vladivostok, 690022; ul. Sukhanova 8, Vladivostok, 690920
I. A. Tkachenko
Institute of Chemistry, Far Eastern Branch
Email: papynov@mail.ru
Russian Federation, pr. 1000-letiya Vladivostoka 159, Vladivostok, 690022
V. Yu. Maiorov
Institute of Chemistry, Far Eastern Branch
Email: papynov@mail.ru
Russian Federation, pr. 1000-letiya Vladivostoka 159, Vladivostok, 690022
V. S. Pechnikov
Far Eastern Federal University
Email: papynov@mail.ru
Russian Federation, ul. Sukhanova 8, Vladivostok, 690920
A. N. Fedorets
Far Eastern Federal University
Email: papynov@mail.ru
Russian Federation, ul. Sukhanova 8, Vladivostok, 690920
A. S. Portnyagin
Institute of Chemistry, Far Eastern Branch; Far Eastern Federal University
Email: papynov@mail.ru
Russian Federation, pr. 1000-letiya Vladivostoka 159, Vladivostok, 690022; ul. Sukhanova 8, Vladivostok, 690920
A. N. Dran’kov
Institute of Chemistry, Far Eastern Branch; Far Eastern Federal University
Email: papynov@mail.ru
Russian Federation, pr. 1000-letiya Vladivostoka 159, Vladivostok, 690022; ul. Sukhanova 8, Vladivostok, 690920
I. Yu. Buravlev
Institute of Chemistry, Far Eastern Branch; Far Eastern Federal University
Email: papynov@mail.ru
Russian Federation, pr. 1000-letiya Vladivostoka 159, Vladivostok, 690022; ul. Sukhanova 8, Vladivostok, 690920
A. V. Grishin
Far Eastern Federal University
Email: papynov@mail.ru
Russian Federation, ul. Sukhanova 8, Vladivostok, 690920
I. G. Tananaev
Institute of Chemistry, Far Eastern Branch; Far Eastern Federal University; Frumkin Institute of Physical Chemistry and Electrochemistry
Email: papynov@mail.ru
Russian Federation, pr. 1000-letiya Vladivostoka 159, Vladivostok, 690022; ul. Sukhanova 8, Vladivostok, 690920; Leninskii pr. 31, korp. 4, Moscow, 119991
V. A. Avramenko
Institute of Chemistry, Far Eastern Branch; Far Eastern Federal University
Email: papynov@mail.ru
Russian Federation, pr. 1000-letiya Vladivostoka 159, Vladivostok, 690022; ul. Sukhanova 8, Vladivostok, 690920
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