Reduction and adsorption of Pb2+ in aqueous solution by nano zero-valent iron : a SEM, TEM and XPS study

Xi, Yunfei, Mallavarapu, Megharaj, & Naidu, Ravendra (2010) Reduction and adsorption of Pb2+ in aqueous solution by nano zero-valent iron : a SEM, TEM and XPS study. Materials Research Bulletin, 45(10), pp. 1361-1367.

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Abstract

This study reports the synthesis, characterization and application of nano zero-valent iron (nZVI). The nZVI was produced by a reduction method and compared with commercial available ZVI powder for Pb2+ removal from aqueous phase. Comparing with commercial ZVI, the laboratory made nZVI powder has a much higher specific surface area. XRD patterns have revealed zero valent iron phases in two ZVI materials. Different morphologies have been observed using SEM and TEM techniques. EDX spectrums revealed even distribution of Pb on surface after reaction. The XPS analysis has confirmed that immobilized lead was present in its zero-valent and bivalent forms. ‘Core-shell’ structure of prepared ZVI was revealed based on combination of XRD and XPS characterizations. In addition, comparing with Fluka ZVI, this lab made nZVI has much higher reactivity towards Pb2+ and within just 15 mins 99.9% removal can be reached. This synthesized nano ZVI material has shown great potential for heavy metal immobilization from waste water.

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ID Code: 75097
Item Type: Journal Article
Refereed: Yes
Keywords: metals, chemical synthesis, electron microscopy, photoelectron spectroscopy, X-ray diffraction, microstructure, surface properties, nano zero-valent iron
DOI: 10.1016/j.materresbull.2010.06.046
ISSN: 0025-5408
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000)
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 2010 Elsevier
Copyright Statement: This is the author’s version of a work that was accepted for publication in Materials Research Bulletin. 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 Materials Research Bulletin, [VOL 45, ISSUE 10, (2010)] DOI: 10.1016/j.materresbull.2010.06.046
Deposited On: 18 Aug 2014 00:39
Last Modified: 19 Aug 2014 06:36

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