Comparison of Flat Sheet Supported Liquid Membranes in Germanium Transport with Different Carriers

Document Type : Research paper

Authors

1 Assistant professor, Department of Mining Engineering, Amirkabir university of technology, Tehran, Iran

2 Faculty member, Department of Mining Engineering, Amirkabir University of Technology, Tehran, Iran

Abstract

Objective: In this study, for the first time, the transport permeability of germanium from aqueous solutions containing tartaric acid and oxalic acid as complexing agents by membrane system was compared.
Materials and methods: This comparison was done using three Flat sheet supported liquid membrane (FSSLM) systems with different carriers, including Alamine 336 (5-30 %v/v), Aliquat 336 (0.5-10 %v/v), and Cyanex 923 (5-35 %v/v). Despite separate studies on these FSSLMs, no systematic comparison of the permeability of these membranes has been performed. This comparison was made based on the effective parameters, including carrier concentration, complexing agents (tartaric acid 0.0004- 0.0138 mol/L), and strip phase (0-2 mol/L).
Results: According to the results, by comparing the value of the maximum permeability coefficient of carrier phases, it can be said that the maximum permeability coefficient of the membrane system containing Aliquat 336 (2.58 x 10-3 cm/s) is 1.4 and 2.7 times, respectively, that of the membrane containing Alamine 336 (1.87 x 10-3 cm/s) and Cyanex 923 (0.997 x 10-3 cm/s). The results related to the effect of the concentration of the complexing agent and the strip phase also showed that the permeability coefficient of germanium by Aliquat 336 as a carrier phase is higher among the three carrier phases. In this way, the optimal condition was obtained with the concentration of Aliquat 336 %v/v, 0.0021 mol/L tartaric acid, and 0.5 mol/L HCl in the strip phase.
Conclusions: As a result, it can be emphasized that Aliquat 336 has high germanium transport permeability in all types of conditions applied in the three mentioned FSSLM systems. Low consumption of Aliquat 336 equals low cost; therefore, it is a suitable option for membrane systems in future research.

Keywords

Main Subjects


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