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  • Alumina Nanofibers Grafted with Functional Groups: A New Design in Efficient Sorbents for Removal of Toxic Contaminants from Water

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    Author(s)
    Yang, Dongjiang
    Paul, Blain
    Xu, Wujun
    Yuan, Yong
    Liu, Erming
    Ke, Xuebin
    M. Wellard, Robert
    Guo, Cheng
    Xu, Yao
    Sun, Yuhan
    Zhu, Huaiyong
    Griffith University Author(s)
    Yang, Dongjiang
    Year published
    2010
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    Abstract
    A new design in efficient sorbents for the removal of trace pollutants from water was proposed: grafting the external surface of ?-alumina (?-Al2O3) nanofibers with functional groups that have a strong affinity to the contaminants. This new grafting strategy greatly improves the accessibility of these sorption sites to adsorbates and thus efficiency of the fibrous sorbents. The product sorbents could capture the pollutants selectively even when the concentration of the contaminants is extremely low. Two types of ?-Al2O3 nanofibers with different size were prepared via facile hydrothermal methods. Thiol groups were then grafted ...
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    A new design in efficient sorbents for the removal of trace pollutants from water was proposed: grafting the external surface of ?-alumina (?-Al2O3) nanofibers with functional groups that have a strong affinity to the contaminants. This new grafting strategy greatly improves the accessibility of these sorption sites to adsorbates and thus efficiency of the fibrous sorbents. The product sorbents could capture the pollutants selectively even when the concentration of the contaminants is extremely low. Two types of ?-Al2O3 nanofibers with different size were prepared via facile hydrothermal methods. Thiol groups were then grafted on the ?-Al2O3 fibers by refluxing the toluene solution of 3-mercaptopropyltrimethoxysilane (MPTMS). The thiol group modified fibers not only can efficiently remove heavy metal ions (Pb2+ and Cd2+) from water at a high flux, but also display high sorption capacity under sorption equilibrium conditions. Similar result was obtained from the nanofibers grafted with octyl groups which are employed to selectively adsorb highly diluted hydrophobic 4-nonylphenol molecules from water. This study demonstrates that grafting nanofibers is a new and effective strategy for developing efficient sorbents.
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    Journal Title
    Water Research
    Volume
    44
    Issue
    3
    DOI
    https://doi.org/10.1016/j.watres.2009.10.014
    Copyright Statement
    © IWA Publishing 2010. This is the author-manuscript version of this paper. The definitive peer-reviewed and edited version of this article is published in Vol. 44(3), pp. 741-750, 2010, Water Research, dx.doi.org/10.1016/j.watres.2009.10.014.
    Subject
    Structural Chemistry and Spectroscopy
    Colloid and Surface Chemistry
    Publication URI
    http://hdl.handle.net/10072/39954
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    • Journal articles

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