The Chemistry of Americium. I : A Study of the Preparation of Am(V) and Its Behavior by Means of TTA Extraction

Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1970-01-01 DOI:10.1246/BCSJ.43.89

M. Hara

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引用次数: 13

Abstract

The method for preparing Am(V) in various solutions was investigated by utilizing the difference in extractability between Am(V) and Am(III) in an TTA-isobutanol extraction system; Am(III) was quantitatively extracted with 0.1M TTA in isobutanol from a 1M acetate buffer solution at a pH greater than 3, while the percentage of Am(V) extracted into the organic phase was increased substantially with an increase in the pH from 3 to 5. When the organic phase containing Am(V) was shaken with an aqueous phase having a proper pH value and composition, Am(V) was selectively stripped into the aqueous phase. The stability of the valency state of Am(V) in the perchlorate, the acetate, and the sulfate solutions was then studied by examining the variation in the percentage of americium extracted as a function of the standing time. The rate of change in the valency state in the acetate and the perchlorate media is very slow, while it is rather rapid in the sulfate medium. This difference may be attributable to the faste...

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美国的化学。1: TTA萃取法制备Am(V)及其行为研究

利用Am(V)和Am(III)在ta -异丁醇萃取体系中可萃取性的差异，研究了在不同溶液中制备Am(V)的方法;在pH大于3的1M醋酸缓冲溶液中，用0.1M TTA在异丁醇中定量提取Am(III)，当pH从3增加到5时，Am(V)被萃取到有机相的百分比大幅增加。当含有Am(V)的有机相与具有适当pH值和组成的水相振荡时，Am(V)被选择性地剥离到水相中。然后，通过检测镅提取率随放置时间的变化，研究了Am(V)在高氯酸盐、醋酸盐和硫酸盐溶液中价态的稳定性。在乙酸盐和高氯酸盐介质中，价态的变化速度很慢，而在硫酸盐介质中，价态的变化速度相当快。这种差异可能是由于口味…

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Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy

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