SEPARATION OF COBALT FROM EUROPIUM WITH MESOPOROUS HYBRID SILICA-POLY(STYRENE) IMPREGNATED CHELATING RESIN

被引：6

作者：

Borai, Emad ^{[1
]}

Karesoja, Mikko ^{[2
]}

Harjula, Risto ^{[3
]}

机构：

[1] Atom Energy Author, Hot Lab Ctr, Cairo, Egypt

[2] Univ Helsinki, Dept Chem, Polymer Chem Lab, SF-00100 Helsinki, Finland

[3] Univ Helsinki, Dept Chem, Lab Radiochem, SF-00100 Helsinki, Finland

来源：

MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW | 2013年 / 34卷 / 01期

关键词：

extractive separation; immobilization of chelating ligands; rare earth elements REEs; silica; RADIOACTIVE-WASTE MANAGEMENT; EXTRACTION CHROMATOGRAPHY; MINOR ACTINIDES; SILICA-GEL; LANTHANIDES; PRECONCENTRATION; METALS; POLYMERIZATION; PALLADIUM; PLATINUM;

D O I：

10.1080/08827508.2011.623748

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

This article describes resins for extraction chromatography capable of separating cobalt from europium. Radionuclides Eu-152 and Co-57 were used to represent the REEs and heavy metals. Resins were prepared by immobilizing poly(styrene) on porous silica particles and impregnating the particles with an organic extractant: Octyl(phenyl)-N,N-disiobutylcarbamoylmethylphosphineoxide (CMPO), bis(2,4,4-trimethylphentyl)dithiophosphinic acid (Cyanex-301), 2-thenoyl trifluoroacetone (HTTA), tributylphosphate (TBP) or dibenzo-21-crown-7 (DB21C7). The specific adsorption of Eu(III) and Co(II) was studied by measuring distribution coefficients and uptake percentages as a function of contact time, solution pH and metal ion concentration. The new resins, especially Cyanex 301/SiO2-P, provide rapid kinetics and high adsorption selectivity for Co(II). The efficient and selective adsorption of Eu(III) on SiO2-P impregnated with CMPO, a bifunctional organophosphorus compound and HTTA, a beta-diketone compound, is attributed to strong complex formation between the soft donor atom of each chelating ligand and trivalent ion.

引用

页码：57 / 72

页数：16