Sorption of cesium radionuclides from aqueous solutions onto natural and modified aluminosilicates / Voronina A.V., Blinova M.O., Kulyaeva I.O., Sanin P.Yu., Semenishchev V.S., Afonin Yu.D. // Radiochemistry. - 2015. - V. 57, l. 5. - P. 522-529.

ISSN:

10663622

Type:

Article

Abstract:

Sorption of 137Cs from aqueous solutions onto natural aluminosilicates and onto those modified with mixed nickel potassium (NPF) and iron potassium (IPF) ferrocyanides was studied. The support being modified influences the composition, structure, and thermal stability of the formed ferrocyanide compounds and the sorption properties of the resulting sorbents. The modification increases the cesium distribution coefficients and static exchange capacity; it also extends the pH range of aluminosilicate operation. The most effective sorbents for cesium were obtained on the basis of glauconite (Gl) and clinoptilolite of the Shivertui deposit (ClSh). The cesium distribution coefficient on NPF-ClSh sorbent in the concentration range 10-7-10-5 mg L-1 was logK d [mL g-1] = 7.0 ± 1.0, and on NPF-Gl and NPF-ClSh samples in the concentration range 10-4-102 mg L-1, logK d [mL g-1] = 5.0 ± 0.3 and 5.7 ± 0.4, respectively. The cesium uptake at concentrations in solution ≥100 mg L-1 occurs owing to precipitation of mixed nickel cesium ferrocyanides in the pore space of the sorbents, which considerably enhances their capacity. The static exchange capacity for cesium of NPF-Gl was 220 ± 23, and that of NPF-ClSh, 500 ± 60 mg g-1. © 2015 Pleiades Publishing, Inc.

Author keywords:

aluminosilicates; cesium; clinoptilolite; ferrocyanides; glauconite; radionuclides; remediation of territories; sorption; sorption mechanism; surface modification

Index keywords:

нет данных

DOI:

10.1134/S1066362215050124

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84944250215&doi=10.1134%2fS1066362215050124&partnerID=40&md5=8bc45e2cc4f42b71d34beae207c036e8

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Поле	Значение
Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-84944250215&doi=10.1134%2fS1066362215050124&partnerID=40&md5=8bc45e2cc4f42b71d34beae207c036e8
Affiliations	Yeltsin Ural Federal University, ul. Mira 19, Yekaterinburg, Russian Federation
Author Keywords	aluminosilicates; cesium; clinoptilolite; ferrocyanides; glauconite; radionuclides; remediation of territories; sorption; sorption mechanism; surface modification
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Publisher	Maik Nauka Publishing / Springer SBM
CODEN	RDIOE
Language of Original Document	English
Abbreviated Source Title	Radiochemistry
Source	Scopus