Ultra-hydrophobic aluminum foam development for potential application in continuous water-oil separation processes

Laura Álvarez-Gil, Juan Ramírez, Patricia Fernández-Morales

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    1 Scopus citations

    Abstract

    Owing to their applicability as a selective barrier, porous materials with modified surfaces have been presented as alternatives for addressing oil spills in water. For this application, surface treatment seeks both maximization of surface area and formation of a low-energy layer. To achieve an effective selective barrier that is useful in the separation of oil-water mixtures, with future application in oil spill cleanup, this work presents aluminum foams treated with sodium hydroxide and immersed in dodecanoic acid to achieve pickling and reduction of surface energy, respectively. Treatment efficiency was evaluated using the Brunauer–Emmett–Teller method and contact angle measurements. Results were consistent with other hydrophobic materials. Pore sizes of 425 µm, 850 µm, and 1200 µm were used to evaluate separation of water and oil mixtures under static and dynamic conditions. Oil recovery efficiencies for all pore sizes were greater than 98%.

    Original languageEnglish
    Article number101362
    JournalSurfaces and Interfaces
    Volume26
    DOIs
    StatePublished - Oct 2021

    Bibliographical note

    Funding Information:
    The authors are grateful to “Centro de Investigación para el Desarrollo y la Innovación (CIDI)” from the Universidad Pontificia Bolivariana through UPB-Innova for the financial support given to this work (Project 822B-06/17-18). They also want to thank to Universidad Nacional de Colombia for supporting this work by Grant No ( CAP012417 ).

    Publisher Copyright:
    © 2021 Elsevier Ltd

    Keywords

    • Aluminum foam
    • Hydrophobicity, Oil-water separation, Saturation

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