Investigation of the interaction between 1-hydroxyethane-1,1'-diphosphonic acid (HEDP) and uranium(VI).
A detailed study, using a panel of spectroscopic analytical methods, of the complexation between 1-hydroxyethane-1,1'-diphosphonic acid (HEDP) and uranyl ion (UO(2)(2+)) is reported. Results suggest that the metal complex is present as only 1:1 (metal/ligand) species at low concentration (<10(-)(4) M). The conditional constants of this complex were determined at various pH using time-resolved laser-induced fluorescence (TRLIF) and electrospray ionization mass spectrometry (ESI-MS). Further investigations indicate the presence of a 1:2 (metal/ligand) complex at higher concentrations ( approximately 10(-)(2) M). Selectivity studies as well as structural aspects are presented.
Jacopin
Christophe
C
CEA-Saclay, DEN/DPC/SECR/LSRM, 91191 Gif-sur-Yvette Cedex, France. jacopin@carnac.cea.fr
Sawicki
Marcin
M
Plancque
Gabriel
G
Doizi
Denis
D
Taran
Frédéric
F
Ansoborlo
Eric
E
Amekraz
Badia
B
Moulin
Christophe
C