P. A. Osin, T. I. Trofimov, Yu. M. Kulyako, S. E. Vinokurov, B. F. Myasoedov
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引用次数: 0
Abstract
New approaches to the selective isolation of Am from the actinide–lanthanide fraction of high-level waste with preliminary oxidation of Am(III) to Am(V) and Am(VI) using ammonia and ammonia–carbonate media are proposed. When ammonium hydroxide is added to a 0.1 M HNO3 solution containing Am(V), Cm(III), and Pr(III) (as a mimic of the behavior of lanthanides) to pH ~8, AmO2+ shows increased stability and is retained in the solution to 80%, whereas Cm(III) and Pr(III) precipitate in the form of poorly soluble compounds. In ammonia–carbonate solutions at pH ~10, up to 96% of the initial amount of Am(VI) is retained in the solution, and Cm(III) and Pr(III) precipitate to 85%.
提出了利用氨和氨-碳酸介质将氨（III）初步氧化为氨(V)和氨（VI），从高放废物锕系-镧系组分中选择性分离氨的新方法。当氢氧化铵加入到含有Am(V)、Cm（III）和Pr(III)（模拟镧系元素的行为）的0.1 M HNO3溶液中至pH ~8时，AmO2+表现出更高的稳定性并保留在溶液中80%，而Cm（III）和Pr（III）则以难溶化合物的形式沉淀。在pH ~10的碳酸氨溶液中，Am（VI）的初始含量可达96%，Cm（III）和Pr（III）的沉淀量可达85%。
期刊介绍：
Radiochemistry is a journal that covers the theoretical and applied aspects of radiochemistry, including basic nuclear physical properties of radionuclides; chemistry of radioactive elements and their compounds; the occurrence and behavior of natural and artificial radionuclides in the environment; nuclear fuel cycle; radiochemical analysis methods and devices; production and isolation of radionuclides, synthesis of labeled compounds, new applications of radioactive tracers; radiochemical aspects of nuclear medicine; radiation chemistry and after-effects of nuclear transformations.
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