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Interactions of the rare earth elements-desferrioxamine B complexes with ${it Pseudomonas fluorescens}$ and $$gamma$$-Al$$_{2}$$O$$_{3}$$

希土類元素-デスフェロオギザミンB錯体と蛍光菌とアルミナとの相互作用

大貫 敏彦; 吉田 崇宏*

Onuki, Toshihiko; Yoshida, Takahiro*

希土類元素(REE)-DFOB錯体と蛍光菌及びアルミナとの相互作用を調べた結果、固体へのREEの吸着が高いのが、蛍光菌では低いpH溶液で、アルミナでは高pHで得られた。一方、Ceの吸着が隣のREEよりも小さくなる負の吸着異常は、両固体ともpHが大きくなるほど大きくなった。これは、DFO-B希土類元素錯体の安定性に依存するためである。

We have studied the interactions of REEs (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er) - desferrioxamine B (DFO) complexes with ${it Pseudomonas fluorescens}$ cells and with $$gamma$$-Al$$_{2}$$O$$_{3}$$, at pH 4 - 9. The higher percent adsorption of REEs was obtained at lower pHs on P. Fluorescens cells and at higher pHs on $$gamma$$-Al$$_{2}$$O$$_{3}$$. Degree of negative anomaly of Ce compared to its neighboring REEs, La(III) and Pr(III) decreased with increasing pH. Thus, the pH dependence of Ce anomaly is predominantly dependent on the stability of Ce(IV)-DFO complex.

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パーセンタイル:34.14

分野:Chemistry, Multidisciplinary

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