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Report No.

Adsorption of Th(IV) and Pu(IV) on the surface of ${it Pseudomonas fluorescens}$ and ${it Bacillus subtilis}$ in the presence of desferrioxamine siderophore

Yoshida, Takahiro*; Ozaki, Takuo; Onuki, Toshihiko; Francis, A. J.

Thorium(IV) adsorption on bacterial cells in the presence of DFO was larger than that of Pu(IV) because of the smaller stability of the Th(IV)-DFO complex than that of the Pu(IV)-DFO complex. On the other hand, adsorption of Pu(IV) was larger than that of Fe(III), where in the stability of the Pu(IV)- and Fe(III)-DFO complex is comparable. P. fluorescens showed a higher affinity for Th(IV) and Pu(IV) than B. subtilis, though potentiometric titration of bacterial cells indicated that surfaces of P. fluorescens and B. subtilis cells showed similar proton binding properties.



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