TY - JOUR
T1 - Modelling of the Am(III) - Cm(III) kinetic separation effect observed during metal ion extraction by bis-(1,2,4)-triazine ligands
AU - Distler, Petr
AU - Stamberg, Karel
AU - John, Jan
AU - Harwood, Laurence
AU - Lewis, Frank
N1 - 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
PY - 2018
Y1 - 2018
N2 - 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).
AB - 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).
KW - Am(III)
KW - Cm(III)
KW - bis-(1,2,4)-triazine ligands
KW - BTPhen ligands
KW - kinetic seperation effect
KW - liquid-liquid extraction
UR - https://www.scopus.com/pages/publications/85034219371
U2 - 10.1080/01496395.2017.1384017
DO - 10.1080/01496395.2017.1384017
M3 - Article
SN - 0149-6395
VL - 53
SP - 277
EP - 285
JO - Separation Science and Technology
JF - Separation Science and Technology
IS - 2
ER -