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@ARTICLE{Wei:52375,
author = {Wei, Y. and Kumagai, M. and Takashima, Y. and Modolo, G.
and Odoj, R.},
title = {{S}tudies on the separation of minor actinides from
high-level wastes by extraction chromatography using novel
silica-based extraction resins},
journal = {Nuclear technology},
volume = {132},
issn = {0029-5450},
address = {La Grange Park, Ill.},
publisher = {Soc.},
reportid = {PreJuSER-52375},
pages = {413 - 423},
year = {2000},
note = {Record converted from VDB: 12.11.2012},
abstract = {To develop an advanced partitioning process by extraction
chromatography using a minimal organic solvent and compact
equipment to separate minor actinides such as Am and Cm from
nitrate acidic high-level waste (HLW) solution, several
novel silica-based extraction resins have been prepared by
impregnating organic extractants into the
styrene-divinylbenzene copolymer, which is immobilized in
porous silica particles (SiO2-P). The extractants include
octyl(phenyl)-N, N-diisobutylcarbamoylmethylphosphine oxide
(CMPO), di(2-ethylhexyl)phosphoric acid (HDEHP), and
bis(2,4,4-trimethylpentyl)dithiophosphinic acid (Cyanex
301). Compared to conventional polymer-matrix resins, these
new types of extraction resin are characterized by rapid
kinetics and significantly low pressure loss in a packed
column.The results of separation experiments revealed that
trivalent actinides and lanthanides can be separated from
other fission products, such as Cs, Sr, and Ru in simulated
HLW solution containing concentrated nitric acid by
extraction chromatography using a CMPO/SiO2-P resin-packed
column. Satisfactory separation between Am(III) and a macro
amount of lanthanides from simulated HLW solution with pH 4
was achieved by using a newly purified Cyanex 301/SiO2-P
resin. However, the Am(III) separation was very sensitive to
the purity of Cyanex 301, and the improvement of its
stability is an important task for practical utilization.},
keywords = {J (WoSType)},
cin = {ISR},
ddc = {530},
cid = {I:(DE-Juel1)VDB182},
pnm = {Nukleare Entsorgungsforschung},
pid = {G:(DE-Juel1)FUEK25},
shelfmark = {Nuclear Science $\&$ Technology},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000165418100008},
url = {https://juser.fz-juelich.de/record/52375},
}