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000907868 037__ $$aFZJ-2022-02257
000907868 041__ $$aEnglish
000907868 1001_ $$0P:(DE-Juel1)190476$$aDiaz Gomez, Laura Johana$$b0$$eCorresponding author$$ufzj
000907868 1112_ $$a19th Radiochemical Conference (RadChem 2022)$$cMariánské Lázně$$d2022-05-15 - 2022-05-20$$gRadChem 2022$$wCzech Republic
000907868 245__ $$aScreening of modified diglycolamide diastereomers to increase Am(III) selectivity during the partitioning of PUREX raffinate solution
000907868 260__ $$c2022
000907868 3367_ $$033$$2EndNote$$aConference Paper
000907868 3367_ $$2DataCite$$aOther
000907868 3367_ $$2BibTeX$$aINPROCEEDINGS
000907868 3367_ $$2DRIVER$$aconferenceObject
000907868 3367_ $$2ORCID$$aLECTURE_SPEECH
000907868 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1661154908_4409$$xOther
000907868 520__ $$aMultiple strategies have been developed to separate lanthanides (Ln) and actinides (An) from Spent Nuclear Fuel (SNF) and PUREX raffinate through solvent extraction. Current research is focusing on the development of new ligands to separate Am(III) from Cm(III) and other fission Ln(III). Diglycolamides (DGA) such as N,N,N′,N′‐tetra-n-octyl diglycolamide (TODGA) are promising extractants for this task. Recently, methyl substitutions in the backbone of TODGA with different orientation were studied, and interesting effects on the selectivity for Am(III) over Cm(III) and other Ln(III) were observed.[1] The orientation on the alkyl groups has shown different behavior reflected on the affinity for Am(III) and efficiency of the system. Here, we study the selectivity and affinity of two related extractants (TODGA and N,N,N′,N′-tetra-n-decyl diglycolamide, TDDGA) with dipropyl and ethyl-methyl substitutions in the backbone, and their respective diastereomers (syn or anti 0.1 M in n-dodecane). An inverse selectivity is observed for Am(III) over Cm(III) and other Ln(III) at high nitric acid concentration (7 - 10 M). The steric hindrance gives low distribution ratios D < 1.5 for trivalent metal ions. Pu (IV) was also tested for the interest in the complexation behavior with tetravalent ions. Pu(IV) shows high distribution values at the same HNO3 concentration (D > 10). The separation factors are inversely proportional to the HNO3 concentration. The syn-ethyl-methyl substitutions for both analogues showed the highest D values for Am(III) among the other ligands, giving a promising molecule for further studies. The results of the extraction studies will be presented and discussed in the poster.1.	Wilden, A.; Kowalski, P. M.; Klaß, L.; Kraus, B.; Kreft, F.; Modolo, G.; Li, Y.; Rothe, J.; Dardenne, K.; Geist, A.; Leoncini, A.; Huskens, J.; Verboom, W. Unprecedented Inversion of Selectivity and Extraordinary Difference in the Complexation of Trivalent f-Elements by Diastereomers of a Methylated Diglycolamide. Chem. Eur. J. 2019, 25, 21, 5507-5513. DOI:10.1002/chem.201806161.
000907868 536__ $$0G:(DE-HGF)POF4-1412$$a1412 - Predisposal (POF4-141)$$cPOF4-141$$fPOF IV$$x0
000907868 536__ $$0G:(DE-Juel1)02E11921A$$aSEPAM - Verbundprojekt: Untersuchungen zur SEParation von Americium aus hochradioaktiven Abfalllösungen (SEPAM), Teilprojekt A (02E11921A)$$c02E11921A$$x1
000907868 7001_ $$0P:(DE-Juel1)130438$$aWilden, Andreas$$b1$$ufzj
000907868 7001_ $$0P:(DE-Juel1)130383$$aModolo, Giuseppe$$b2$$ufzj
000907868 7001_ $$0P:(DE-HGF)0$$aGullo, Maria Chiara$$b3
000907868 7001_ $$0P:(DE-HGF)0$$aVerboom, Willem$$b4
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000907868 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130438$$aForschungszentrum Jülich$$b1$$kFZJ
000907868 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130383$$aForschungszentrum Jülich$$b2$$kFZJ
000907868 9131_ $$0G:(DE-HGF)POF4-141$$1G:(DE-HGF)POF4-140$$2G:(DE-HGF)POF4-100$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF4-1412$$aDE-HGF$$bForschungsbereich Energie$$lNukleare Entsorgung, Sicherheit und Strahlenforschung (NUSAFE II)$$vNukleare Entsorgung$$x0
000907868 9141_ $$y2022
000907868 920__ $$lyes
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