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Published in:
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2016 | OriginalPaper | Chapter

7. Sorption Values for Americium

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

Like other actinides, americium (Am) is an important constituent of radioactive waste from nuclear power production. In any typical aqueous environmental setting, americium exists exclusively in the trivalent oxidation state. Similar to tetravalent actinides, americium hydrolyses extensively in aqueous solutions and sorbs strongly onto concrete, hydrated cement paste and individual CSH phases. Due to the chemical similarity of trivalent actinides and lanthanides, information for americium can be supplemented with additional data for other well-researched elements, such as curium and europium. The combined evidence clearly demonstrates strong sorption under all conditions, with no clear trend across the different states of cement degradation. Spectroscopic information suggests that sorption occurs through surface adsorption as well as through incorporation into the CSH structure, replacing Ca. Similarly, incorporation into the calcite lattice is supported by spectroscopic evidence.

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previous chapter Sorption Values for Thorium, Uranium, Plutonium, Neptunium, and Protactinium
next chapter Sorption Values for Selenium, Molybdenum, and Technetium
Footnotes
1
The experts had a divided opinion on this; therefore, for conservative reasons, the Eu data were not used for selecting best estimates.
 
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Metadata
Title
Sorption Values for Americium
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_7

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