dc.identifier.uri |
http://dx.doi.org/10.15488/69 |
|
dc.identifier.uri |
http://www.repo.uni-hannover.de/handle/123456789/87 |
|
dc.contributor.author |
Tits, Jan
|
|
dc.contributor.author |
Walther, Clemens
|
|
dc.contributor.author |
Stumpf, Thorsten
|
|
dc.contributor.author |
Mace, Nathalie
|
|
dc.contributor.author |
Wieland, Erich
|
|
dc.date.accessioned |
2015-10-23T13:51:36Z |
|
dc.date.available |
2015-10-23T13:51:36Z |
|
dc.date.issued |
2015 |
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dc.identifier.citation |
Tits, Jan; Walther, Clemens; Stumpf, Thorsten; Mace, Nathalie; Wieland, Erich: A luminescence line-narrowing spectroscopic study of the uranium(VI) interaction with cementitious materials and titanium dioxide. In: Dalton Transactions 44 (2015), Nr. 3, S. 966-976. DOI: http://dx.doi.org/10.1039/c4dt02172j |
|
dc.description.abstract |
Non-selective luminescence spectroscopy and luminescence line-narrowing spectroscopy were used to study the retention of UO22+ on titanium dioxide (TiO2), synthetic calcium silicate hydrate (C-S-H) phases and hardened cement paste (HCP). Non-selective luminescence spectra showed strong inhomogeneous line broadening resulting from a strongly disordered UO22+ bonding environment. This problem was largely overcome by using luminescence line-narrowing spectroscopy. This technique allowed unambiguous identification of three different types of UO22+ sorbed species on C-S-H phases and HCP. Comparison with spectra of UO22+ sorbed onto TiO2 further allowed these species to be assigned to a surface complex, an incorporated species and an uranate-like surface precipitate. This information provides the basis for mechanistic models describing the UO22+ sorption onto C-S-H phases and HCP and the assessment of the mobility of this radionuclide in a deep geological repository for low and intermediate level radioactive waste (L/ILW) as this kind of waste is often solidified with cement prior to storage. |
eng |
dc.description.sponsorship |
Swiss National Cooperative for the Disposal of Radioactive Waste |
|
dc.language.iso |
eng |
|
dc.publisher |
Cambridge : Royal Society of Chemistry |
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dc.relation.ispartofseries |
Dalton Transactions 44 (2015), Nr. 3 |
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dc.rights |
CC BY 3.0 Unported |
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dc.rights.uri |
http://creativecommons.org/licenses/by/3.0/ |
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dc.subject |
laser fluorescence spectroscopy |
eng |
dc.subject |
silicate hydrate phases |
eng |
dc.subject |
uranyl ions |
eng |
dc.subject |
electronic-structure |
eng |
dc.subject |
actinyl ions |
eng |
dc.subject |
u(vi) |
eng |
dc.subject |
sorption |
eng |
dc.subject |
solubility |
eng |
dc.subject |
speciation |
eng |
dc.subject |
complexes |
eng |
dc.subject.ddc |
540 | Chemie
|
ger |
dc.title |
A luminescence line-narrowing spectroscopic study of the uranium(VI) interaction with cementitious materials and titanium dioxide |
eng |
dc.type |
Article |
|
dc.type |
Text |
|
dc.relation.essn |
1477-9234 |
|
dc.relation.issn |
1477-9226 |
|
dc.relation.doi |
http://dx.doi.org/10.1039/c4dt02172j |
|
dc.bibliographicCitation.issue |
3 |
|
dc.bibliographicCitation.volume |
44 |
|
dc.bibliographicCitation.firstPage |
966 |
|
dc.bibliographicCitation.lastPage |
976 |
|
dc.description.version |
publishedVersion |
|
tib.accessRights |
frei zug�nglich |
|