Chitosan-ferrocyanide sorbents for concentrating Cs-137 from seawater

Chitosan-ferrocyanide sorbents (CFS) based on ferrocyanides Ni-K, Cu-K and Zn-K for concentrating Cs-137 from the seawater have been obtained. Sorbent CFS Zn-K can be used in sorption-regeneration cycle using 5 M solution of NH 4 NO 3 as the eluent. In dynamic condition, the sorption efficiency of C...

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Bibliographic Details
Published in:Separation science and technology 2017-08, Vol.52 (12), p.1983-1991
Main Authors: Egorin, Andrei, Tokar, Eduard, Zemskova, Larisa, Didenko, Nina, Portnyagin, Arseniy, Azarova, Yuliya, Palamarchuk, Marina, Tananaev, Ivan, Avramenko, Valentin
Format: Article
Language:English
Subjects:
Cesium
Chitosan
Elution
Ferrocyanide
ferrocyanide sorbents
Nickel
Radioisotopes
Regeneration
Regeneration (biological)
Removal
Seawater
Sorbents
Sorption
Zinc
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Summary:Chitosan-ferrocyanide sorbents (CFS) based on ferrocyanides Ni-K, Cu-K and Zn-K for concentrating Cs-137 from the seawater have been obtained. Sorbent CFS Zn-K can be used in sorption-regeneration cycle using 5 M solution of NH 4 NO 3 as the eluent. In dynamic condition, the sorption efficiency of Cs-137 and the elution for the CFS Zn-K exceeds 95%. The two-staged scheme of Cs-137 concentrating from seawater is suggested. First stage is the removal of radionuclide from seawater by the CFS Zn-K sorbent, and the second stage is the sorption of Cs-137 from eluate by the CFS Ni-K sorbent.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2017.1321669