シリカゲルによるジルコニウムとニオブの新分離法

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  • A new method for separation of niobium from zirconium with silica gel.

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The adsorption behaviors of niobium and zirconium on silica gel and some other adsorbents were investigated in various concentrations of nitric acid or hydrochloric acid. Niobium is strongly adsorbed on silica gel in a concentrated nitric acid solution, while zirconium is not. In a concentrated hydrochloric acid solution, niobium is weakly adsorbed. Based on the results, a new simple separation method of niobium from other radionuclides especially zirconium is developed. In this method, niobium can be recovered by 81%, and separation from zirconium is complete.<BR>The method was applied to separation of radioniobium from the neutron-irradiated zirconium wire and from the neutron-irradiated uranium with the results of complete elimination of other radionuclides present.

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