Study on New Metal Ion Separation Materials using Solvent Extraction Reagent

Abstract

For the purpose of efficient separation of metal ions dissolved in aqueous solutions, various separation materials have been synthesized and investigated their selectivity. For solvent extraction, negatively charged multidentate ligands were synthesized and their separation behavior was researched. In order to improve the selectivity of metal ions in aqueous solution, solvent extraction system was added octadecyl surface-modified silica gel (ODS-Silica). And also investigated the separation and the extraction behavior of ODS-Silica loaded with the solvent extraction reagent. In the system using negative divalent hexadentate reagent (H 2 Clbbpen) as the solvent extraction reagent, the extractability and selectivity were improved in both systems. TTA and Dithizone were selected as solvent extraction reagents to research the adsorption and separation of transition metal ions and noble metals, respectively. As an inexpensive separation material, banana fiber was focused and examined the selectivity of natural or chelated fiber. Banana fiber was chemically bonded with several Schiff base derivatives was found to be able to adsorption transition metal ions, but the selectivity and adsorption capacity were low. Banana fiber showed the ability to collect cesium and strontium, but its low heat resistance made it difficult to use. In this paper, the results of investigations on the adsorption capacity and selectivity of each separation material were described.