Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1595, Issue -, Pages 248-256Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2019.02.057
Keywords
Functionalized ordered mesoporous carbon; Rare earth elements; Bis-2-ethylhexyl phosphoric acid; Separations; Europium; Neodymium; HDEHP; Chromatography
Funding
- Defense Threat Reduction Agency [HDTRA1-16-0015]
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Adjacent lanthanides are among the most challenging elements to separate, to the extent that current separations materials would benefit from transformative improvement. Ordered mesoporous carbon (OMC) materials are excellent candidates, owing to their small mesh size and uniform morphology. Herein, OMC materials were physisorbed with bis-(2-ethylhexyl) phosphoric acid (HDEHP) and sorption of Eu3+ was investigated under static and dynamic conditions. The HDEHP-OMC materials displayed higher distribution coefficients and loading capacities than current state-of-the-art materials. Using a small, unpressurized column, a separation between Eu3+ and Nd3+ was achieved. Based on these experimental results, HDEHP-OMC have shown potential as a solid phase sorbent for chromatographic, intragroup, lanthanide separations. (C) 2019 Elsevier B.V. All rights reserved.
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