Adsorption of phosphate by amino-functionalized and co-condensed SBA-15

Jae Woo Choi, Seung Yeon Lee, Sang Hyup Lee, Ki Bong Lee, Dong Ju Kim, Seok Won Hong

    Research output: Contribution to journalArticlepeer-review

    25 Citations (Scopus)

    Abstract

    In this study, the applications of mesoporous materials based on silica, and those with modifications, namely post-synthetic grafting, co-condensation, and pure SBA-15, were investigated for the removal of phosphate from sewage. The mesostructures were confirmed by X-ray diffraction, Brunauer-Emmett-Teller, Fourier transform infrared spectroscopy, and transmission electron microscopy. The absorption of phosphate by the mesoporous adsorbents was examined, using different adsorption models to describe the equilibrium and kinetic data. The maximum adsorption capacities of the mesostructured adsorbents were found to be 69.970, 59.890, and 2.018 mg/g for the co-condensation, post-synthetic grafting, and pure SBA-15, respectively. The kinetic data showed that the adsorption of phosphate onto three different mesostructures followed the pseudo-first-order kinetic model.

    Original languageEnglish
    Pages (from-to)2551-2562
    Number of pages12
    JournalWater, Air, and Soil Pollution
    Volume223
    Issue number5
    DOIs
    Publication statusPublished - 2012 Jun

    Bibliographical note

    Funding Information:
    Acknowledgments The subject is supported by the Korea Ministry of Environment as “Global Top Project” (project no.: GT-11-B-01-011-1).

    Keywords

    • Amino-functionalized
    • Co-condensation
    • Grafting
    • Mesoporous silica
    • Phosphate
    • SBA-15

    ASJC Scopus subject areas

    • Environmental Engineering
    • Environmental Chemistry
    • Ecological Modelling
    • Water Science and Technology
    • Pollution

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