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Published in:
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2016 | OriginalPaper | Chapter

12. Sorption Values for Zirconium

Authors : Michael Ochs, Dirk Mallants, Lian Wang

Published in: Radionuclide and Metal Sorption on Cement and Concrete

Publisher: Springer International Publishing

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Abstract

Zirconium (Zr) is used in nuclear reactors (in the form of zircaloys) because of its low thermal neutron capture cross section and high resistance to corrosion. In aqueous solutions, zirconium exists exclusively in the tetravalent oxidation state. Zr(IV) hydrolyses strongly with Zr(OH)4(aq), and Zr(OH)6 2 − being the only relevant species in cementitious environments (and low zirconium concentration). Very high sorption of zirconium has been observed in all cementitious materials investigated to date (hydrated cement pastes, CSH phases). Sorption appears to increase with the degree of cement degradation, in particular from a C/S ratio of 1.3 to 1.0. While the actual sorption mechanisms for zirconium are not known, the available evidence suggests that mainly CSH phases are responsible for zirconium sorption on cementitious materials.

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previous chapter Sorption Values for Hydrogen and Beryllium
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Metadata
Title
Sorption Values for Zirconium
Authors
Michael Ochs
Dirk Mallants
Lian Wang
Copyright Year
2016
Book
Radionuclide and Metal Sorption on Cement and Concrete

Print ISBN: 978-3-319-23650-6

Electronic ISBN: 978-3-319-23651-3

Copyright Year: 2016

DOI
https://doi.org/10.1007/978-3-319-23651-3_12

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