Highly Efficient Extraction Separation of Lanthanides Using a Diglycolamic Acid Extractant
Open Access
- 10 February 2014
- journal article
- Published by Springer Nature in Analytical Sciences
- Vol. 30 (2) , 263-269
Abstract
Liquid–liquid extraction of lanthanide ions (Ln3+) using N,N-dioctyldiglycolamic acid (DODGAA) was comprehensively investigated, together with fluorescence spectroscopic characterization of the resulting extracted complexes in the organic phase. DODGAA enables the quantitative partitioning of all Ln3+ ions from moderately acidic solutions, while showing selectivity for heavier lanthanides, and provides remarkably high extraction separation performance for Ln3+ compared with typical carboxylic acid extractants. Furthermore, the mutual separation abilities of DODGAA for light lanthanides are higher than those of organophosphorus extractants. Slope analysis, loading tests, and electrospray ionization mass spectrometry measurements demonstrated that the transfer of Ln3+ with DODGAA proceeded through a proton-exchange reaction, forming a 1:3 complex, Ln(DODGAA)3. The stripping of Ln3+ from the extracting phase was successfully achieved under acidic conditions. Time-resolved laser-induced fluorescence spectroscopy revealed that the extracted Eu3+ ions were completely dehydrated by complexation with DODGAA.Keywords
This publication has 37 references indexed in Scilit:
- Application of Ionic Liquids to Extraction Separation of Rare Earth Metals with an Effective Diglycol Amic Acid ExtractantJOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 2011
- Substituent effects on BTP's basicity and complexation properties with Ln III lanthanide ionsNew Journal of Chemistry, 2010
- Application of Parallel Factor Analysis for Time-Resolved Laser Fluorescence Spectroscopy: Implication for Metal Speciation StudyEnvironmental Science & Technology, 2010
- Studies on the synergistic extraction of rare earths from nitrate medium with mixtures of sec-nonylphenoxy acetic acid and 1,10-phenanthrolineSeparation and Purification Technology, 2010
- Lanthanide-Based Luminescent Hybrid MaterialsChemical Reviews, 2009
- Extraction behavior of lanthanides using a diglycolamide derivative TODGA in ionic liquidsDalton Transactions, 2008
- Tripodal diglycolamides as highly efficient extractants for f-elementsNew Journal of Chemistry, 2007
- Europium speciation by time-resolved laser-induced fluorescenceAnalytica Chimica Acta, 2003
- Solvent extraction of metal ions from nitric acid solution using N,N ′-substituted malonamides. Experimental and crystallographic evidence for two mechanisms of extraction, metal complexation and ion-pair formationJ. Chem. Soc., Dalton Trans., 1997
- THE SOLVENT EXTRACTION OF RARE-EARTH METALS BY CARBOXYLIC ACIDSSolvent Extraction and Ion Exchange, 1992