Separation of germanium by liquid-liquid and supported liquid membrane extraction from heavy metals

Document Type : Research paper

Author

Department of mining and metallurgical Engineering, Amirkabir university of technology

Abstract

In this research, in order to separate germanium from aqueous solution containing tartaric acid, liquid-liquid extraction (LLX) and supported liquid membrane (SLM) were employed and compared. In these systems, polytetrafluoroethylene (PTFE) as the membrane and Alamine 336 as the carrier/extractant were used. In the LLX system, the effect of concentrations of extractant, tartaric acid, and HCl as a stripping agent were studied. As a result, the germanium extraction efficiency increased up to 100% after reaching Alamine 336 concentration up to 10 %v/v. At the tartaric acid concentration of 2.750 mM, the highest germanium extraction (98.6%) was obtained. According to the SLM experiments, the carrier concentration of 15 %v/v was enough for the efficient transport of germanium from feed to strip phase. In comparison with LLX system, despite transportation of all germanium species in the SLM system, the time of this process (20 h) is higher than that of the LLX system.

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References

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Journal of Separation Science and Engineering
Volume 10, Issue 1
September 2018
Pages 36-46

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