Title of article :
Solvent Extraction and Transport of Rare Earth Metal Ions Using 5.11.17.23-Tetra-tert-butyl-25,27-bis (diethylcarbomoylmethoxy) -26,28-dihydroxy Calix [4] arene
Author/Authors :
Yaftian, Mohammad Reza Department of Chemistry - University of Zanjan , Vahedpoor, Morteza Department of Chemistry - University of Zanjan , Burgard, Michel Laboratory of Mineral and Analytical Chemistry - CNRS - No. 7512 - ECPM - University of Louis Pasteur - Strasbourg - FRANCE , Matt, Dominique Group of Molecular Inorganic Chemistry - CNRS - No. 7513 - University of Louis Pasteur - Strasbourg - FRANCE
Abstract :
The solvent extraction of rare earth metal ions from nitrate solutions by 5.11.17.23-tetra-tert-butyl-25,27-bis(diethylcarbamoylmethoxy)-26,28-dihydroxycalix[4]arene (L) in 1,2-dichloroethane has been investigated. The alalysis of the extraction equilibrium obtained from a mixture of La3+, Eu3+, Er3+ and Y3+ revealed that the extracted species have a 1:1 metal/ligand ratio. The intra-group separation efficiencies of the ligand have been evaluated in a competitive extraction and transport of 11 rare earth metal ions (La3+, pr3+, Nd3+, Sm3+, Eu3+, Gd3+, Dy3+, Ho3+, Yb3+ and Y3+). The transport experiment has been performed through a supported liguid membrane containing the ligand in o-nitrophenyl hexyl ether (NPHE). The distribution ratio and the flux of the ions generally increases as the atomic radii decrease.
Keywords :
Calix [4] arene , Transport , Rare earth , Metal ions , Extraction
Journal title :
Astroparticle Physics
