Separation of the Minor Actinides Americium(III) and Curium(III) by Hydrophobic and Hydrophilic BTPhen Ligands: Exploiting Differences in their Rates of Extraction and Effective Separations at Equilibrium
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F18%3A00321447" target="_blank" >RIV/68407700:21340/18:00321447 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1080/07366299.2018.1429358" target="_blank" >http://dx.doi.org/10.1080/07366299.2018.1429358</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1080/07366299.2018.1429358" target="_blank" >10.1080/07366299.2018.1429358</a>
Alternative languages
Result language
angličtina
Original language name
Separation of the Minor Actinides Americium(III) and Curium(III) by Hydrophobic and Hydrophilic BTPhen Ligands: Exploiting Differences in their Rates of Extraction and Effective Separations at Equilibrium
Original language description
The complexation and extraction of the adjacent minor actinides Am(III) and Cm(III) by both hydrophobic and hydrophilic pre-organized 2,9-bis(1,2,4-triazin-3-yl)-1,10-phenanthroline (BTPhen) ligands has been studied in detail. It has been shown that Am(III) is extracted more rapidly than Cm(III) by the hydrophobic CyMe4-BTPhen ligand into different organic diluents under non-equilibrium extraction conditions, leading to separation factors for Am over Cm (SFAm/Cm) as high as 7.9. Furthermore, the selectivity for Am(III) over Cm(III) can be tuned through careful choice of the extraction conditions (organic diluent, contact time, mixing speed, ligand concentration). This `kinetic’ effect is attributed to the higher presumed kinetic lability of the Am(III) aqua complex towards ligand substitution. A dependence of the Am(III)/Cm(III) selectivity on the structure of the alkyl groups attached to the triazine rings is also observed, and BTPhens bearing linear alkyl groups are less able to discriminate between Am(III) and Cm(III) than CyMe4-BTPhen. Under equilibrium extraction conditions, hydrophilic tetrasulfonated BTPhen ligands complex selectively Am(III) over Cm(III) and prevent the extraction of Am(III) from nitric acid by the hydrophobic O-donor ligand N,N,N’,N’-tetraoctyldiglycolamide (TODGA), giving separation factors for Cm(III) over Am(III) (SFCm/Am) of up to 4.6. These results further underline the utility of the BTPhen ligands for the challenging separation of the chemically similar minor actinides Am(III) and Cm(III).
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10400 - Chemical sciences
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Solvent Extraction and Ion Exchange
ISSN
0736-6299
e-ISSN
1532-2262
Volume of the periodical
36
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
21
Pages from-to
115-135
UT code for WoS article
000430081400001
EID of the result in the Scopus database
2-s2.0-85040996866