Am(III) separation from acidic solutions by diamides of dipicolinic acid
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M. Bubeníková
,
J. Rais
Abstract
The separation of minor actinides from high level liquid waste (HLLW) belongs to the principal challenges of advanced nuclear fuel treatment. We studied in this work several diamides of dipicolinic acid for direct separation of trivalent actinides from post-PUREX raffinate. The N,N′-diethyl-N,N′-di-meta-tolyldipicolinamide, Et(m)TDPA, exhibited the highest Am(III) extraction ability and sufficient Am(III)/Eu(III) selectivity (SFAm/Eu ≥ 5) from all tested derivatives. Am(III) and Eu(III) extraction with the Et(m)TDPA into solvents of different polarities was studied in detail. The extraction abilities of extractants dissolved in polar nitro- or fluorinated solvents were significantly higher than those in less or low polar solvents like hexyl methyl ketone, 1-octanol, chloroform, toluene, etc. Et(m)TDPA in nitrobenzene provided selective separation of americium from lanthanides (SFAm/Ln > 5) and from the majority of other fission products (SF > 150) present in model PUREX raffinate. The co-extraction of some undesirable elements as Zr and Pd was significantly suppressed by addition of oxalic acid and HEDTA to the raffinate solution.
© 2013 by Walter de Gruyter Berlin Boston
Artikel in diesem Heft
- Masthead
- Masthead
- Predictions of redox potentials of Sg in acid solutions as a function of pH
- Am(III) separation from acidic solutions by diamides of dipicolinic acid
- PC-88A – impregnated polymeric beads: Preparation, characterization and application for extraction of Pu(IV) from nitric acid medium
- Studies on the transport of actinides and lanthanides through DHDECMPO based supported liquid membranes (SLM)
- Applicability of Raman spectroscopy as a tool in nuclear forensics for analysis of uranium ore concentrates
- Study on the acid–base surface property of the magnetite graphene oxide and its usage for the removal of radiostrontium from aqueous solution
- Development of a radiothallium (III) labeld porphyrin complex as a potential imaging agent
- Sources of variability in the determination by evaporation method of gross alpha activity in water samples
Artikel in diesem Heft
- Masthead
- Masthead
- Predictions of redox potentials of Sg in acid solutions as a function of pH
- Am(III) separation from acidic solutions by diamides of dipicolinic acid
- PC-88A – impregnated polymeric beads: Preparation, characterization and application for extraction of Pu(IV) from nitric acid medium
- Studies on the transport of actinides and lanthanides through DHDECMPO based supported liquid membranes (SLM)
- Applicability of Raman spectroscopy as a tool in nuclear forensics for analysis of uranium ore concentrates
- Study on the acid–base surface property of the magnetite graphene oxide and its usage for the removal of radiostrontium from aqueous solution
- Development of a radiothallium (III) labeld porphyrin complex as a potential imaging agent
- Sources of variability in the determination by evaporation method of gross alpha activity in water samples
