In:
Radiochimica Acta, Walter de Gruyter GmbH, Vol. 102, No. 1-2 ( 2014-2-28), p. 41-51
Abstract:
In the last decades, the separation of actinides was widely and continuously studied in China. A few kinds of salt-free
reductants to adjust Pu and Np valences have been investigated. N , N -dimethylhydroxylamine is a good reductant with high reduction
rate constants for the co-reduction of Pu(IV) and Np(VI), and monomethylhydrazine is a simple compound for the individual reduction of Np(VI). A dvanced P UREX based on O rganic R eductants (APOR) was proposed. Trialkylphosphine oxide
(TRPO) with a single functional group was found to possess strong affinity to tri- , tetra- and hexa -valent
actinides. TRPO process has been first explored in China for actinides partitioning from high level waste and the good partitioning performance was demonstrated by the hot test. High extraction selectivity for trivalent actinides over lanthanides by
dialkyldithiophosphinic acids was originally found in China. A separation process based on purified Cyanex 301 for the separation of Am from lanthanides was presented and successfully tested in a battery of miniature centrifugal contactors.
Type of Medium:
Online Resource
ISSN:
2193-3405
,
0033-8230
DOI:
10.1515/ract-2014-2093
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2014
Permalink
