Influence of thermodynamic database on the modelisation of americium(III) speciation in a simulated biological medium - Archive ouverte HAL Access content directly
Journal Articles Radiochimica Acta Year : 2005

Influence of thermodynamic database on the modelisation of americium(III) speciation in a simulated biological medium

(1) , (2) , (3) , (1) , (4) , (5) , (5) , (5) , (5) , (6)
1
2
3
4
5
6

Abstract

A first exercice was led, considering only the americium(III) species in solution. Even with different data sets, all the exercises are in relatively good agreement, concluding to successive complexation of the radioelement by phosphate (pH range from 0 to 3), citrate (pH range from 3 to 8) and hydroxo-carbonate (pH range from 8 to 14). Nevertheless, the speciation of americium differs for each pH range from one work to an other. These results are still observed when the speciation calculation includes the formation of solids. Nevertheless, some workers did not integrate in their data set the formation constant of Am(PO4). This solid is known to be very insoluble in typical biological media. All the calculations where Am(PO4) was not in the TDB presented a speciation where americium is solvated (mostly under citrate forms). When the formation of Am(PO4) is considered, the actinide is quantitatively present under this solid species. This work is a representative example of the impact of the thermodynamic data used in speciation exercises. Some exercices, using uncompleted TDB had wrong results and led to the conclusion of the necessity in the use of expertised and extended TDB.
Fichier principal
Vignette du fichier
Bion_2005_RCA_93_715.pdf (301.48 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

cea-00427036 , version 1 (22-08-2022)

Identifiers

Cite

L. Bion, E. Ansoborlo, V. Moulin, Pascal E. Reiller, R. Collins, et al.. Influence of thermodynamic database on the modelisation of americium(III) speciation in a simulated biological medium. Radiochimica Acta, 2005, 93 (11), pp.715-718. ⟨10.1524/ract.2005.93.11.715⟩. ⟨cea-00427036⟩
181 View
20 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More