Counter-current extraction of uranium and lanthanides from simulated high-level waste using N,N,N′,N′-tetraoctyl diglycolamide

被引：110

作者：

Ansari, S. A. ^{[1
]}

Prabhu, D. R. ^{[1
]}

Gujar, R. B. ^{[1
]}

Kanekar, A. S. ^{[1
]}

Rajeswari, B. ^{[1
]}

Kulkarni, M. J. ^{[1
]}

Murali, M. S. ^{[1
]}

Babu, Y. ^{[1
]}

Natarajan, V. ^{[1
]}

Rajeswari, S. ^{[2
]}

Suresh, A. ^{[2
]}

Manivannan, R. ^{[2
]}

Antony, M. P. ^{[2
]}

Srinivasan, T. G. ^{[2
]}

Manchanda, V. K. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Div Radiochem, Bombay 400085, Maharashtra, India

[2] Indira Gandhi Ctr Atom Res, Div Fuel Chem, Chem Grp, Kalpakkam 603102, Tamil Nadu, India

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2009年 / 66卷 / 01期

关键词：

Mixer-settler; Counter-current extraction; TODGA; Actinide partitioning; PUREX RAFFINATE; FREE ACIDITY; TODGA; ACTINIDES; SEPARATION; DIAMIDES; AM(III); AMIDES;

D O I：

10.1016/j.seppur.2008.11.019

中图分类号：

TQ [化学工业];

学科分类号：

081705 [工业催化];

摘要：

A mixture of N,N,N',N'-tetraoctyl diglycolamide (TODGA) and N,N-dihexyl octanamide (DHOA) dissolved in NPH has been evaluated for actinide partitioning from simulated high-level waste by cold tests in mixer-settler runs. The feed solution was a synthetic purex raffinate of pressurized heavy water reactor (PHWR) origin where lanthanides were taken as stand-in for trivalent actinides. Quantitative extraction (forward and backward) of trivalent lanthanides was observed in four stages each. Elements such as Fe, Mn, Ni, Ba and Cs were practically un-extracted. However, Cr and Mo were partially co-extracted. Reusability of the organic phase in five successive cycles suggested excellent hydrolytic stability of the reagent. Though the solvent system was susceptible to radiolytic degradation, negligible effects on the extraction as well as on the stripping of lanthanides were observed with solvent irradiated to 100 KGy radiation dose. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：118 / 124

页数：7

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