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Brushite-Metakaolin Composite Geopolymer Material as an Effective Adsorbent for Lead Removal from Aqueous Solutions

Author

Listed:
  • Dunja Djukić

    (Faculty of Biology, University of Belgrade, Studentski Trg 16, 11000 Belgrade, Serbia)

  • Aleksandar Krstić

    (Department of Physical Chemistry, “Vinča” Institute of Nuclear Sciences—National Institute of thе Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia)

  • Ksenija Jakovljević

    (Faculty of Biology, University of Belgrade, Studentski Trg 16, 11000 Belgrade, Serbia)

  • Svetlana Butulija

    (Department of Materials, “Vinča” Institute of Nuclear Sciences—National Institute of thе Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia)

  • Ljubica Andjelković

    (Department of Chemistry, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia)

  • Vladimir Pavlović

    (Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11000 Belgrade, Serbia)

  • Miljana Mirković

    (Department of Materials, “Vinča” Institute of Nuclear Sciences—National Institute of thе Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia)

Abstract

Newly designed mesoporous brushite-metakaolin-based geopolymer materials were examined with an idea for using this material as a potential adsorbent for Pb(II) removal from aqueous solutions. As a starting component for geopolymer synthesis, a natural raw kaolinite clay with the addition of 2 wt.%, 4 wt.%, 6 wt.%, 8 wt.%, and 10 wt.% of pure brushite was used. Phase, structural, morphological, and adsorption properties of newly synthesized mesoporous brushite-metakaolin geopolymer materials were examined in detail by the means of XRPD, FTIR, SEM-EDS, BET/BJH, and ICP-OES methods. The ICP-OES results showed that the synthesized material samples with 2 wt.%, 4 wt.%, and 6 wt.% of brushite possess significant adsorption properties and the mechanisms of the adsorption process can be attributed to chemisorption. The most notable result is that brushite-metakaolin-geopolymer with 2 wt.% of brushite have the best efficiency removal, more than 85% of Pb(II).

Suggested Citation

  • Dunja Djukić & Aleksandar Krstić & Ksenija Jakovljević & Svetlana Butulija & Ljubica Andjelković & Vladimir Pavlović & Miljana Mirković, 2022. "Brushite-Metakaolin Composite Geopolymer Material as an Effective Adsorbent for Lead Removal from Aqueous Solutions," Sustainability, MDPI, vol. 14(7), pages 1-16, March.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:7:p:4003-:d:781670
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