Spectroscopic evaluation of thermodynamics of trivalent actinides in brines

A systematic investigation of thermodynamic properties of trivalent aquatic actinides has been initiated in our laboratory to develop models capable of predicting their behavior in natural multicomponent brines of high concentration. An overview on this subject is provided taking curium as a represe...

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Bibliographic Details
Published inJournal of alloys and compounds Vol. 271; pp. 728 - 737
Main Authors Fanghänel, Th, Kim, J.-I.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 12.06.1998
Subjects
Curium
Fluorescence spectroscopy
Pitzer model
Solution thermodynamics
Trivalent actinides
Fluorescence spectroscopy
Curium
Solution thermodynamics
Pitzer model
Trivalent actinides
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ISSN0925-8388
1873-4669
DOI10.1016/S0925-8388(98)00196-0

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Summary:A systematic investigation of thermodynamic properties of trivalent aquatic actinides has been initiated in our laboratory to develop models capable of predicting their behavior in natural multicomponent brines of high concentration. An overview on this subject is provided taking curium as a representative for trivalent actinides. Cm(III) is chosen, because of its high fluorescence spectroscopic sensitivity that enables a direct speciation in solution in the nanomolar concentration range. Interactions of Cm(III) with the main natural inorganic ligands Cl −, SO 4 2−, OH − and CO 3 2− are investigated by time resolved laser fluorescence spectroscopy (TRLFS). An overall thermodynamic model for trivalent actinides is developed based on the ion interaction (Pitzer) approach.
ISSN:0925-8388
1873-4669
DOI:10.1016/S0925-8388(98)00196-0