Degradation of simazine from aqueous solutions by diatomite-supported nanosized zero-valent iron composite materials

Sun, Zhiming, Zheng, Shuilin, Ayoko, Godwin A., Frost, Ray L., & Xi, Yunfei (2013) Degradation of simazine from aqueous solutions by diatomite-supported nanosized zero-valent iron composite materials. Journal of Hazardous Materials, 263(Part 2), pp. 768-777.

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A novel composite material based on deposition of nanosized zero-valent iron (nZVI) particles on acid-leached diatomite was synthesised for the removal of a chlorinated contaminant in water. The nZVI /diatomite composites were characterized by X-ray diffraction, scanning electron microscopy, elemental analysis, transmission electron microscopy and X-ray photoelectron spectroscopy. Compared with the pure nZVI particles, better dispersion of nZVI particles on the surface or inside the pores of diatom shells was observed. The herbicide simazine was selected as the model chlorinated contaminant and the removal efficiency by nZVI /diatomite composite was compared with that of the pristine nZVI and commercial iron powder. It was found that the diatomite supported nZVI composite material prepared by centrifugation exhibits relatively better efficient activity in decomposition of simazine than commercial Fe, lab synthesized nZVI and composite material prepared via rotary evaporation, and the optimum experimental conditions were obtained based on a series of batch experiments. This study on immobilizing nZVI particles onto diatomite opens a new avenue for the practical application of nZVI and the diatomite-supported nanosized zero-valent iron composite materials have potential applications in environmental remediation.

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31 since deposited on 08 Jan 2014
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ID Code: 65767
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Zero-valent iron, Simazine, Diatomite, Composite material
DOI: 10.1016/j.jhazmat.2013.10.045
ISSN: 0304-3894
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200)
Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Elsevier BV
Copyright Statement: NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Hazardous Materials. 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 Hazardous Materials, [263, Part 2, (15 December 2013)] DOI
Deposited On: 08 Jan 2014 00:03
Last Modified: 02 Jan 2016 09:02

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