Modelling of the Am(III) - Cm(III) kinetic separation effect observed during metal ion extraction by bis-(1,2,4)-triazine ligands

Distler, Petr, Stamberg, Karel, John, Jan, Harwood, Laurence and Lewis, Frank (2018) Modelling of the Am(III) - Cm(III) kinetic separation effect observed during metal ion extraction by bis-(1,2,4)-triazine ligands. Separation Science and Technology, 53 (2). pp. 277-285. ISSN 0149-6395

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Am-Cm Modelling Paper Accepted Version.pdf - Accepted Version
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Official URL: http://dx.doi.org/10.1080/01496395.2017.1384017

Abstract

The kinetic separation effect was observed leading to a separation factor for Am(III) over Cm(III) as high as 7.9 by using 2,9-bis-(1,2,4-triazin-3-yl)-1,10-phenantroline (BTPhen) ligands in our recent study. In an attempt to explain the observed tendencies, several kinetic models were tested. A model based on mass transfer as the rate-controlling process was found to best describe the kinetic data and allowed to simulate the dependence of Am/Cm separation factor on time. The calculated values of the overall mass-transfer coefficients confirmed that the observed kinetic effect was caused by the different rates of Am(III) and Cm(III) extraction. This kinetic separation phenomenon and its explanation paves the way for potential new approaches to separation of metal ions with very similar properties, such as the adjacent minor actinides Am(III) and Cm(III).

Item Type: Article
Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in Separation Science and Technology on 25th September 2017, available online: http://www.tandfonline.com/10.1080/01496395.2017.1384017
Uncontrolled Keywords: Am(III), Cm(III), bis-(1,2,4)-triazine ligands, BTPhen ligands, kinetic separation effect, liquid-liquid extraction
Subjects: F100 Chemistry
F200 Materials Science
J200 Metallurgy
Department: Faculties > Health and Life Sciences > Applied Sciences
Depositing User: Frank Lewis
Date Deposited: 02 Oct 2017 12:03
Last Modified: 08 Dec 2017 11:09
URI: http://nrl.northumbria.ac.uk/id/eprint/32190

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