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Fluoride Removal and Recovery from Water Using Reverse Osmosis and Osmotic Membrane Crystallization

Author

Listed:
  • Wuhib Zeine Ousman

    (Jimma Institute of Technology, Jimma University, Jimma P.O. Box 378, Ethiopia
    Materials & Process Engineering (iMMC-IMAP), UCLouvain, Place Sainte Barbe 2, 1348 Louvain-la-Neuve, Belgium)

  • Esayas Alemayehu

    (Jimma Institute of Technology, Jimma University, Jimma P.O. Box 378, Ethiopia)

  • Patricia Luis

    (Materials & Process Engineering (iMMC-IMAP), UCLouvain, Place Sainte Barbe 2, 1348 Louvain-la-Neuve, Belgium
    Research & Innovation Centre for Process Engineering (ReCIPE), Place Sainte Barbe 2, bte L5.02.02, 1348 Louvain-la-Neuve, Belgium)

Abstract

Fluoride is a concern for human health at high concentrations, but it is also a valuable compound with multiple applications. Thus, having a system that gives the opportunity to remove and recover this valuable element from water is highly interesting. Reverse osmosis (RO) is a promising technology in the removal of fluoride from water. Nevertheless, the residual retentate highly concentrated in fluoride is still a concern. The aim of this study was to evaluate the performance of an integrated process consisting of RO and membrane crystallization to remove fluoride from water and to recover it as a pure fluoride salt. Pure water permeability and fluoride rejection of a commercial RO membrane was tested under different conditions. In addition, the performance of an osmotic membrane crystallization setup was evaluated, considering the effect caused by the flow rates and the concentration of both the feed and the osmotic solution on the mass transfer coefficient. The crystallization process allowed the production of pure NaF crystals with octahedral morphology with a face-centered cubic crystal system.

Suggested Citation

  • Wuhib Zeine Ousman & Esayas Alemayehu & Patricia Luis, 2023. "Fluoride Removal and Recovery from Water Using Reverse Osmosis and Osmotic Membrane Crystallization," Clean Technol., MDPI, vol. 5(3), pages 1-24, August.
    • Handle: RePEc:gam:jcltec:v:5:y:2023:i:3:p:49-996:d:1212226
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    References listed on IDEAS

    as
    1. Mar Garcia Alvarez & Vida Sang Sefidi & Marine Beguin & Alexandre Collet & Raul Bahamonde Soria & Patricia Luis, 2022. "Osmotic Membrane Distillation Crystallization of NaHCO 3," Energies, MDPI, vol. 15(7), pages 1-13, April.
    2. Chen, Qian & Burhan, Muhammad & Akhtar, Faheem Hassan & Ybyraiymkul, Doskhan & Shahzad, Muhammad Wakil & Li, Yong & Ng, Kim Choon, 2021. "A decentralized water/electricity cogeneration system integrating concentrated photovoltaic/thermal collectors and vacuum multi-effect membrane distillation," Energy, Elsevier, vol. 230(C).
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