Recovery of scandium from acidic waste solutions by means of polymer inclusion membranes

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Authors
Kraus, Manuel
Stiehm, Johannes
Constable, Edwin C.
Author (Corporation)
Publication date
2022
Typ of student thesis
Course of study
Type
01A - Journal article
Editors
Editor (Corporation)
Supervisor
Parent work
Hydrometallurgy
Special issue
DOI of the original publication
Link
Series
Series number
Volume
213
Issue / Number
Pages / Duration
Patent number
Publisher / Publishing institution
Elsevier
Place of publication / Event location
Edition
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Practice partner / Client
Abstract
Scandium is a raw material with properties that promise considerable potential for application in alloys to enable aviation fuel savings and as dopants for use in sustainable energy production using solid oxide fuel cells. Despite these attractive properties, scandium is rarely used due to its scarcity and unreliable supply. Therefore, new strategies for scandium recovery are of economic priority. In this study, polymer inclusion membranes (PIMs) consisting of PVDF-HFP, 2-NPOE and DEHPA, were optimised for selective scandium separation from real TiO2 production waste. With the optimised system, >60% of the scandium was recovered with high selectivity, resulting in scandium mole fraction at more than two orders of magnitude higher in the receiving phase than in the original waste. This suggests PIMs may be an effective way to recover scandium from bulk waste, thus easing the scarcity and insecurity that currently limit its bulk application.
Keywords
Resource recovery, Critical raw material, Membrane filtration, TiO2 chloride route, Waste valorisation
Subject (DDC)
500 - Naturwissenschaften
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ISBN
ISSN
0304-386X
1879-1158
Language
English
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
Gold
License
'https://creativecommons.org/licenses/by/4.0/'
Citation
HEDWIG, Sebastian, Manuel KRAUS, Meret AMREIN, Johannes STIEHM, Edwin C. CONSTABLE und Markus LENZ, 2022. Recovery of scandium from acidic waste solutions by means of polymer inclusion membranes. Hydrometallurgy. 2022. Bd. 213. DOI 10.1016/j.hydromet.2022.105916. Verfügbar unter: https://doi.org/10.26041/fhnw-4328

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