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Interactions of Tc(IV) with citrate in NaCl media
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Nathalie A. Wall
Veröffentlicht/Copyright:
17. Dezember 2012
Abstract
This paper presents the experimental determination of the stability constant for the citrate complexes with TcO(OH)+ and TcO(OH)20 at different ionic strengths (NaCl), using a solvent extraction method. Data show that the stability constants for the formation of TcO(OH)Cit2− and TcO(OH)2Cit3− are 107.5 ± 0.2 and 102.8 ± 0.2, respectively, at zero ionic strength, with an average of 106.5 ± 0.3 and 102.8 ± 0.2, respectively, in the 1.0–3.0 M ionic strength range. PHREEQC calculations based on these stability constants show that the TcO(OH)Cit2− is the predominant species between pH 3 and 8 and that 50 mM citrate leads to a Tc(IV) solubility of 2 × 10−5 M at pH 5.
Published Online: 2012-12-17
Published in Print: 2013-02
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Artikel in diesem Heft
- Cross section measurements and theoretical calculations of proton induced nuclear reactions on natural tellurium
- Speciation of Am(III)/Eu(III) sorbed on γ-alumina: effect of metal ion concentration
- Correlation of retention of lanthanide and actinide complexes with stability constants and their speciation
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- Interactions of Tc(IV) with citrate in NaCl media
- Complexation of rhenium with ethylenediaminetetraacetic acid: studies of technetium analogue using Raman spectroscopy
- Thymidine kinase enzyme selective imaging radiopharmaceutical: 99mTc(CO)3-Ganciclovir
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