Tetraphenylpyridinium pertechnetate: a promising salt for the immobilization of technetium
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Edward Mausolf
Abstract
In the context of the immobilization of technetium, as pertechnetate, from spent nuclear fuel from reprocessing activies, or potentially a scavenger for pertechnetate in repository conditions, the compound tetraphenylpyridinium pertechnetate (TPPy-TcO4) has been synthesized, structurally characterized and its solubility investigated. The compound TPPy-TcO4 has been prepared by metathesis from ammonium pertechnetate and 1,2,4,6-tetraphenylpyridinium tetrafluoroborate from a water/acetone media. Diffraction measurements show that the compound crystallizes in the orthorhombic space group (Pbca) with a = 16.1242(10)Å, b = 16.7923(10)Å, and c = 17.6229(11)Å. The solubility of the salt has been investigated at room temperature in aqueous media at pH 2.22, 6.91, and 9.81 where solubility products were determined as 6.16 × 10−12, 4.13 × 10−12, and 1.16 × 10−11, respectively. The compound TPPy-TcO4 is not the most insoluble pertechnetate salt reported so far, but comparatively has a lower solubility than that of most other pertechnetate salts.
© by Oldenbourg Wissenschaftsverlag, Las Vegas, NV 89074, Germany
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Articles in the same Issue
- Historical Item
- On-line gas chromatographic studies of Nb, Ta, and Db bromides
- Isotope dilution gamma spectrometry for Pu using low energy photons
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- Speciation of U(VI) sorbed onto ZrP2O7 in the presence of citric and oxalic acid
- A novel biamperometric methodology for thorium determination by EDTA complexometric titration
- The influence of temperature and small organic ligands on the sorption of Eu(III) on Opalinus Clay
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- Impact of water environmental change and migration of radionuclides on Hokutolite conservation in Peito (Taiwan)
- In vivo biological evaluation of 131I radiolabeled-paclitaxel glucuronide (131I-PAC-G)
- Neutron activation analysis and atomic absorption spectrophotometry for the analysis of fresh, pasteurized and powder milk
