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Surface modification of alumina nanofibres for the selective adsorption of alachlor and imazaquin herbicides

Paul, Blain, Martens, Wayde N., & Frost, Ray L. (2011) Surface modification of alumina nanofibres for the selective adsorption of alachlor and imazaquin herbicides. Journal of Colloid and Interface Science, 360(1), pp. 132-138.

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Abstract

The effective removal of pollutants using a thermally and chemically stable substrate that has controllable absorption properties is a goal of water treatment. In this study, the surfaces of thin alumina (γ-Al2O3) nanofibres were modified by the grafting either of two organosilane agents, 3-chloro-propyl-triethoxysilane (CPTES) and octyl-triethoxysilane (OTES). These modified materials were then trialed as absorbents for the removal of two herbicides, alachlor and imazaquin from water. The formation of organic groups during the functionalisation process established super hydrophobic sites on the surfaces of the nanofibres. This super hydrophobic group is a kind of protruding adsorption site which facilitates the intimate contact with the pollutants. OTES grafted substrate were shown to be more selective for alachlor while imazaquin selectivity is shown by the CPTES grafted substrate. Kinetics studies revealed that imazaquin was rapidly adsorbed on CPTES-modified surfaces. However, the adsorption of alachlor by OTES grafted surface was achieved more slowly.

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9 citations in Scopus
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7 citations in Web of Science®

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ID Code: 41928
Item Type: Journal Article
Additional Information: This is the work of PhD student Blain Paul
Keywords: Grafted alumina fibres, Adsorption, Water purification, Herbicides, TEM
DOI: 10.1016/j.jcis.2011.04.055
ISSN: 0021-9797
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > Schools > Chemistry
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2011 Elsevier Inc.
Copyright Statement: This is the author’s version of a work that was accepted for publication in Journal of Colloid and Interface Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Colloid and Interface Science, [VOL 360, ISSUE 1, (2013)] DOI: 10.1016/j.jcis.2011.04.055
Deposited On: 09 Jun 2011 09:55
Last Modified: 17 Sep 2013 15:48

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