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Computational simulation and modelling of uranium extraction using tributylphosphate through membrane extractor.

Rahmad Syah1, Dadan Ramadan1, Marischa Elveny2

  • 1Faculty of Engineering, Universitas Medan Area, Medan, Indonesia.

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|September 9, 2021
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Summary

This study optimized uranium extraction using a membrane contactor with tributylphosphate in n-dodecane. Higher extractant concentration and feed acidity significantly improved uranium recovery, with membrane properties being key.

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Area of Science:

  • Chemical Engineering
  • Materials Science
  • Environmental Science

Background:

  • Non-disperse solvent extraction is crucial for metal ion recovery from aqueous solutions.
  • Membrane contactors offer an efficient platform for solvent extraction processes.
  • Uranium extraction requires effective and selective separation techniques.

Purpose of the Study:

  • To investigate uranium extraction efficiency using tributylphosphate in a membrane contactor.
  • To develop and validate a mathematical model for the hollow fiber membrane extractor.
  • To analyze the impact of extractant concentration and feed acidity on uranium recovery.

Main Methods:

  • Development of a 2D mathematical model for fluid flow and mass transfer.
  • Numerical solution of model equations using the finite element method.
  • Experimental investigation of uranium extraction under varying conditions.

Main Results:

  • The mathematical model showed good agreement with experimental uranium extraction data.
  • Increasing tributylphosphate concentration from 5% to 30% enhanced uranium extraction from 2.60% to 34.13%.
  • Uranium extraction increased with feed acidity (1-3 M) and was primarily limited by the microporous membrane.

Conclusions:

  • Membrane specifications, particularly the porosity-to-tortuosity ratio, significantly influence uranium extraction efficiency.
  • The membrane section represents the dominant mass transfer resistance in the system.
  • Optimizing membrane properties is critical for enhancing uranium recovery in membrane-based solvent extraction.