The synergistic extraction of uranium ions from monazite leach solution via HFSLM and its mass transfer

• HFSLM can successfully separate uranium ions from monazite leach solution.
• Optimum extraction and stripping obtained reached 95% and 90%.
• The controlling step for uranium ion separation is chemical reaction.

The mass transfer of synergistic extraction of uranium ions from monazite leach solution via HFSLM was examined. Optimum conditions for synergistic extraction were found to be pH 5 in the feed solution, 0.1 M Cyanex 272 + 0.1 M TOPO in the liquid membrane and 2 M H2SO4 in the stripping solution at 30 °C. After a fourth cycle, the cumulative extraction and stripping of uranium ions reached 95% and 90%. Fractional resistance due to extraction reaction proved to be the highest value. This indicated that mass transfer resistance from the extraction was dominant. The controlling step is the chemical reaction.

Thanaporn Wannachod, Thidarat Wongsawa, Prakorn Ramakul, Ura Pancharoen and Soorathep Kheawhom.Figure optionsDownload as PowerPoint slide