- 作者: 吳坤立 ; 羅建苗
- 作者服務機構: 清華大學原子科學研究所
- 中文摘要: Extractions of uranium from the acidic media, HCl and HNO/sub 3/ at different concentrations, by the tertiary amines, trilaurylamine, triisooctyllamine and trioctylamine were systematically investigated. In experiments, /sup 232/U was used as the tracer and aliquots of both phases after extractions were taken, ashed at 500.degree.C, placed onto stainless steel planchets, and measured by a surface-barrier Si(Li) detector connected to an alpha spectrometer. One unique condition found useful for complete separation of uranium was that of the radioactive uranium present in 8M HCl being extracted with 10% trilaurylamine in xylene. In that case, greater than 95% of the uranium could be extracted into the organic solution, whereas all of the radionuclides of a series of its decayed products,/sup 228/Th, /sup 224/Ra, /sup 220/Rn, /sup 216/Po and/sup 212/Bi remained completely in the aqueous solution. The same procedure could also be used for the separation of uranium from a mixture with its activated nuclides. Plutonium-239 and /sup 241/Am were used as the tracers representing the activated nuclides of uranium. It was found that /sup 241/Am was absolutely not extracted, but that /sup 239/Pu could be extracted with >95% efficiency from the medium of 8 M HCl into 10% trilaurylamine in xylene. However, /sup 239/Pu could be easily stripped using the solution mixture of 8 M HCl and 0.05 M NH/sub 4/I and excluded from the organic solution.
- 英文摘要: --
- 中文關鍵字: Uranium 232 Separation; Plutonium 239; Solvent Extraction; .Alpha. Spectrometry; Tertiary Amines; Trilaurylamine
- 英文關鍵字: 鈾232分離;鈽239;溶劑萃取;.alpha.量譜術;第三胺類;三月桂基胺