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The increasing demand for the strategic elements indium and germanium necessitates the development of new extraction methods. The goal of the presented study is the development of a sustainable method for the selective recovery of indium and germanium from leaching solutions within a bioleaching pro...

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Bibliographic Details
Published in:Chemie ingenieur technik 2015-12, Vol.87 (12), p.1826-1832
Main Authors: Werner, Arite, Mosch, Maria, Haseneder, Roland, Repke, Jens-Uwe
Format: Article
Language:English
Subjects:
Copper
Indium
Leaching
Liquid membranes
Nanofiltration
Solvent extraction
Zinc
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Summary:The increasing demand for the strategic elements indium and germanium necessitates the development of new extraction methods. The goal of the presented study is the development of a sustainable method for the selective recovery of indium and germanium from leaching solutions within a bioleaching process. Rather than commonly used solvent extraction the application of membrane technology, in particular nanofiltration and supported liquid membrane, has been investigated. Results with nanofiltration show that indium and germanium can be separated selectively depending on the pH value of the solution. Furthermore, extraction of indium from a concentrated solution containing Zn, Cu, Fe, and As using supported liquid membrane was performed successfully.Original Abstract: Die steigende Nachfrage nach den strategischen Elementen Indium und Germanium erfordert die Entwicklung neuer Gewinnungsverfahren. Ziel der vorgestellten Forschungsarbeit ist die selektive Gewinnung von Indium und Germanium aus Laugungslosungen eines In-situ-Bioleaching-Prozesses. Anstelle der herkommlich verwendeten Solvent-Extraktion wird die Eignung von Membranverfahren, insbesondere Nanofiltration und membrangestuetzte Extraktion, ueberprueft. Indium und Germanium zeigen ein pH-abhaengiges Trennverhalten bei der Nanofiltration und konnen selektiv getrennt werden. Die Abtrennung von Indium aus einer konzentrierten Losung aus Zn, Cu, Fe und As mittels membrangestuetzter Extraktion war erfolgreich und vielversprechend fuer weitere Untersuchungen.
ISSN:0009-286X
1522-2640
DOI:10.1002/cite.201500065