Journal
INORGANIC CHEMISTRY COMMUNICATIONS
Volume 14, Issue 6, Pages 971-974Publisher
ELSEVIER
DOI: 10.1016/j.inoche.2011.03.045
Keywords
Nanoporous sorbent; Lanthanide; Separations; Iminodiacetic; Chelation; Diamide
Categories
Funding
- DOE Laboratory Directed Research and Development
- U.S. Department of Energy [DE-AC06-67RLO 1830]
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A nanoporous sorbent designed around chelating iminodiacetamide (IDA-Amide) moiety was made on mesoporous silica (MCM-41) and evaluated for lanthanide separations (Ce3+, Nd3+, Eu3+, Gd3+, and Lu3+). The effects of solution pH on lanthanide binding were studied, as well as sorption kinetics, and competition from other metal ions. The IDA-Amide SAMMS (R) demonstrated an interesting difference in the kinetics of sorption of the lanthanide ions in the order of Lu3+ > Eu3+ > Gd3+ > Nd3+ > Ce3+. The close proximity of the ligands in the IDA-Amide SAMMS may allow for multiple metal-ligand interactions (macromolecular chelation). (C) 2011 Elsevier B.V. All rights reserved.
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