TY  - JOUR
AU  - Wei, Y.
AU  - Kumagai, M.
AU  - Takashima, Y.
AU  - Modolo, G.
AU  - Odoj, R.
TI  - Studies on the separation of minor actinides from high-level wastes by extraction chromatography using novel silica-based extraction resins
JO  - Nuclear technology
VL  - 132
SN  - 0029-5450
CY  - La Grange Park, Ill.
PB  - Soc.
M1  - PreJuSER-52375
SP  - 413 - 423
PY  - 2000
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000165418100008
UR  - https://juser.fz-juelich.de/record/52375
ER  -