铀与痕量镤的分离纯化方法
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摘要
在高浓铀年龄的测量过程中,涉及到U、Pa的分离提取。本工作以天然铀、自制~(233)Pa为指示剂,研究了HCl、HF浓度等对TEVA树脂吸附U、Pa的影响,建立了TEVA色层法分离提取U和Pa的方法。结果表明:Pa的放化收率为99%,对Pa的去污因子为5.4×10~3;U的化学收率为96%,对U的去污因子为2.8×10~3。
It is required to separate uranium and protactinium in the determination of highly enriched uranium age.Distribution coefficients of uranium and protactinium were studied with the concentration of hydrochloric acid,hydrofluoric acid,and so on using nature uranium and ~(233)Pa as tracers.The method of separating protactinium and uranium using the TEVA chromatographic method was developed.The radiochemical recovery of protactinium is 99%.The decontamination factor for protactinium is 5.4×10~3.The chemical recovery rate of uranium is 96%,and the decontamination factor for uranium is 2.8×10~3.
It is required to separate uranium and protactinium in the determination of highly enriched uranium age.Distribution coefficients of uranium and protactinium were studied with the concentration of hydrochloric acid,hydrofluoric acid,and so on using nature uranium and ~(233)Pa as tracers.The method of separating protactinium and uranium using the TEVA chromatographic method was developed.The radiochemical recovery of protactinium is 99%.The decontamination factor for protactinium is 5.4×10~3.The chemical recovery rate of uranium is 96%,and the decontamination factor for uranium is 2.8×10~3.
引文
[1] Morgenstern A,Apostolidis C,Mayer K.Age determination of highly enriched uranium:separation and analysis of 231Pa[J].Anal Chem,2002,74(21):5513-5516.
[2]何周国,李安利,范显华,等.高浓铀年龄的测定[J].核化学与放射化学,2005,27(2):91-95.
[3]吕学升,金惠民,刘大鸣,等.γ能谱法测定高浓铀样品年龄[J].核化学与放射化学,2008,30(4):243-247.
[4]张宏俊,任忠国,熊忠华,等.N(231 Pa)/N(235 U)γ谱法测定高浓铀年龄研究[J].核电子学与探测技术,2014,34(5):587-589.
[5] Knight A W,Eitrheim E S,Nelson A W,et al.A simple-rapid method to separate uranium,thorium,and protactinium for U-series age-dating of materials[J].J Environ Radioact,2014,134:66-74.
[6]陈洛娜,包伯荣,钱和生,等.DMHMP萃取色层法分离钍、镤、铀[J].核化学与放射化学,1984,6(4):240-242.
[7]丁华杰,牛雁宁,徐岩冰,等.磷酸三丁脂萃取Pa(Ⅴ)的研究[J].科学技术与工程,2005,5(16):1176-1178.
[2]何周国,李安利,范显华,等.高浓铀年龄的测定[J].核化学与放射化学,2005,27(2):91-95.
[3]吕学升,金惠民,刘大鸣,等.γ能谱法测定高浓铀样品年龄[J].核化学与放射化学,2008,30(4):243-247.
[4]张宏俊,任忠国,熊忠华,等.N(231 Pa)/N(235 U)γ谱法测定高浓铀年龄研究[J].核电子学与探测技术,2014,34(5):587-589.
[5] Knight A W,Eitrheim E S,Nelson A W,et al.A simple-rapid method to separate uranium,thorium,and protactinium for U-series age-dating of materials[J].J Environ Radioact,2014,134:66-74.
[6]陈洛娜,包伯荣,钱和生,等.DMHMP萃取色层法分离钍、镤、铀[J].核化学与放射化学,1984,6(4):240-242.
[7]丁华杰,牛雁宁,徐岩冰,等.磷酸三丁脂萃取Pa(Ⅴ)的研究[J].科学技术与工程,2005,5(16):1176-1178.