scholarly journals Solvent extraction of trivalent europium and americium into nitrobenzene by using hydrogen dicarbollylcobaltate and tetraisopropyl[oxybis(2,1-ethanediyliminocarbonyl)]-bisphosphoramidate

2018 ◽  
Vol 83 (1) ◽  
pp. 51-60
Author(s):  
Emanuel Makrlík ◽  
Petr Vaňura ◽  
Pavel Selucký ◽  
Vasiliy Brusko
Keyword(s):  
Solvent Extraction ◽  
Nuclear Waste ◽  
Waste Treatment ◽  
Extraction And Stability Constants ◽  
Hydrogen Dicarbollylcobaltate ◽  
Cationic Complex ◽  
Complex Species ◽  
Equilibrium Data ◽  
Extraction Agent ◽  
Europium And Americium

Solvent extraction of micro-amounts of Eu3+ and Am3+ from water into nitrobenzene by means of a mixture of hydrogen dicarbollylcobaltate (H+B-) and tetraisopropyl[oxybis(2,1-ethanediyliminocarbonyl)]-bisphosphoramidate (L) was studied. The equilibrium data were explained assuming that the species HL+, ML2 3+ and ML3 3+ (M3+ = Eu3+ or Am3+) are extracted into the organic phase. Extraction and stability constants of the cationic complex species in nitrobenzene saturated with water were determined and discussed. From the experimental results, it is obvious that this effective ligand L for the Eu3+ and Am3+ could be considered as a potential extraction agent for nuclear waste treatment.

scholarly journals Calcium ionophore I as very effective extraction agent for trivalent europium and americium

2019 ◽  
Vol 84 (2) ◽  
pp. 199-209
Author(s):  
Emanuel Makrlík ◽  
Petr Vaňura
Keyword(s):  
Solvent Extraction ◽  
Stability Constants ◽  
Calcium Ionophore ◽  
Extraction And Stability Constants ◽  
Hydrogen Dicarbollylcobaltate ◽  
Cationic Complex ◽  
Complex Species ◽  
Equilibrium Data ◽  
Extraction Agent ◽  
Europium And Americium

The solvent extraction of microamounts of Eu3+ and Am3+ from water into nitrobenzene by means of a mixture of hydrogen dicarbollylcobaltate (H+B-) and calcium ionophore I (marked as the ligand L) was investigated. The equilibrium data have been explained assuming that the species HL+, HL2 +,ML2 3+ and ML3 3+ (M3+: Eu3+ or Am3+) are extracted into the organic phase. The extraction and stability constants of the cationic complex species in nitrobenzene saturated with water have been determined and discussed. It was proven experimentally that the ligand L could be considered as a very strong receptor for Eu3+ and Am3+.

Magnesium ionophore II as an extraction agent for trivalent europium and americium

2016 ◽  
Vol 104 (8) ◽  
Author(s):  
Emanuel Makrlík ◽  
Petr Vaňura
Keyword(s):  
Solvent Extraction ◽  
Hydrogen Dicarbollylcobaltate ◽  
Trivalent Europium ◽  
Extraction Agent ◽  
Europium And Americium

AbstractSolvent extraction of microamounts of trivalent europium and americium into nitrobenzene by using a mixture of hydrogen dicarbollylcobaltate (H

scholarly journals Distribution of micro-amounts of europium in the two-phase water-HCl-nitrobenzene-N,N'-dimethyl-N,N'-diphenyl-2,6-dipicolinamide-hydrogen dicarbollylcobaltate extraction system

2009 ◽  
Vol 74 (7) ◽  
pp. 781-787 ◽  
Author(s):  
Emanuel Makrlík ◽  
Petr Vaňura ◽  
Pavel Selucký ◽  
Vasily Babain ◽  
Ivan Smirnov
Keyword(s):  
Stability Constants ◽  
Organic Phase ◽  
Extraction And Stability Constants ◽  
Extraction System ◽  
Hydrogen Dicarbollylcobaltate ◽  
Nitrobenzene Solution ◽  
Two Phase ◽  
Equilibrium Data ◽  
Phase Water

Extraction of micro-amounts of europium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of N,N'-dimethyl- -N,N'-diphenyl-2,6-dipicolinamide (MePhDPA, L) was investigated. The equilibrium data were explained assuming that the species HL+, + HL2 , 3+ EuL2 and 3+ EuL3 are extracted into the organic phase. The values of the extraction and stability constants of the species in nitrobenzene saturated with water were determined.

Radiolysis and Ageing of C2-BTP in Cinnamaldehyde/Hexanol Mixtures

2006 ◽  
Vol 985 ◽  
Author(s):  
Anna Fermvik ◽  
Christian Ekberg ◽  
Teodora Retegan ◽  
Gunnar Skarnemark
Keyword(s):  
Solvent Extraction ◽  
Aromatic Ring ◽  
Nuclear Waste ◽  
High Resistance ◽  
Potential Problem ◽  
Waste Treatment ◽  
Inhibitory Effect ◽  
Separation Process ◽  
Alternative Methods ◽  
Radiolytic Degradation

AbstractThe separation of actinides from lanthanides is an important step in the alternative methods for nuclear waste treatment currently under development. Polycyclic molecules containing nitrogen are synthesised and used for solvent extraction. A potential problem in the separation process is the degradation of the molecule due to irradiation or ageing. An addition of nitrobenzene has proved to have an inhibitory effect on degradation when added to a system containing C2-BTP in hexanol before irradiation. In this study, 2,6 di(5,6 diethyl 1,2,4 triazin 3 yl)pyridine (C2-BTP) was dissolved in different mixtures of cinnamaldehyde and hexanol and the effects on extraction after ageing and irradiation were investigated. Similar to nitrobenzene, cinnamaldehyde contains an aromatic ring which generally has a relatively high resistance towards radiolysis. Both C2-BTP in cinnamaldehyde and C2-BTP in hexanol seem to degrade with time. The system with C2-BTP in pure hexanol is relatively stable up to 17 days but then starts slowly to degrade. The solution with pure cinnamaldehyde as diluent started to degrade after only ∼20 hours. The opposite is true for degradation caused by radiolysis; hexanol systems are more sensitive to radiolysis than cinnamaldehyde systems. Most of the radiolytic degradation took place during the first days of irradiation, up to a dose of 4 kGy.

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