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Sorption of long-lived .sup.94Nb on magnetite: spectroscopic and electrochemical investigation of the associated mechanism
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Sorption of long-lived .sup.94Nb on magnetite: spectroscopic and electrochemical investigation of the associated mechanism
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Journal Article
Sorption of long-lived .sup.94Nb on magnetite: spectroscopic and electrochemical investigation of the associated mechanism
2023
Overview
The sorption study of long lived .sup.94Nb isotope on magnetite was carried out in the pH range of 1-10, both in aerobic and anaerobic conditions. The present study is focused to understand the mechanism behind the sorption and to predict the role of magnetite in retarding the migration of the radionuclide. The sorption mechanism and the role of Fe(II) site of magnetite were investigated using solvent extraction, cyclic voltammetry, X-ray photoelectron and absorption spectroscopy. Insignificant difference in the sorption pattern and percentage sorption under aerobic and anaerobic conditions suggests similar sorption mechanism in both conditions. The oxidation states of Nb and Fe of magnetite remained unchanged after sorption process. In acidic medium, the sorption mainly occurs via ion exchange whereas in neutral/basic medium via covalent bond formation of Nb with magnetite.
Publisher
Springer
Subject
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