Selective behavior of the siderophore pyoverdine a towards UO2 2+, Th4+, U4+ and other cations.

This paper presents new results on the complexing properties of the siderophore pyoverdine. A towards U4+, Na+ and (CH3)4N+ in aqueous solutions. Comparison with previous data obtained for other actinides (UO2 2+ and Th4+) lead to propose some general trends of the complexation of actinides with pyoverdine. Experiments with two different bases may lead to the determination of some of the pK values of pyoverdine. [ABSTRACT FROM AUTHOR]