Journal
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Volume 52, Issue 1, Pages 49-55Publisher
SOC CHEMICAL ENG JAPAN
DOI: 10.1252/jcej.18we175
Keywords
Ion Exchange; Scandium; Impregnated Resin; Metal Separation; Adsorption
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Funding
- Ministry of Education, Science, Sports, and Culture of Japan [JP16K06830]
- Environment Research and Technology Development Fund (ERTDF), Ministry of the Environment, Japan [3-1710]
- Open Partnership Joint Project of the Japanese Society for the Promotion of Science [AJ179065 (29-9111-t13)]
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Extractant-impregnated resins (EIRs) prepared from 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (commercial name PC-88A), neodecanoic acid (Versatic 10), and XAD-7HP polymeric beads have been developed for separation and pre-concentration of scandium (Sc). The separation factors between Sc and other metal ions are very high, allowing for selective recovery of Sc from a complex metal-mixture solution. Furthermore, desorption of Sc is quantitatively achieved using 2M sulfuric acid, which is difficult for single-extractant-impregnated resins. The adsorption behavior, kinetics, and loading capacity of the binary EIR were investigated. The good reusability of the resin was confirmed by five times repeated use in recycling operation. This binary-extractant-impregnated concept could provide a new way to develop novel ion-exchange resins for metal separation.
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