Journal
MATERIALS RESEARCH BULLETIN
Volume 45, Issue 10, Pages 1361-1367Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2010.06.046
Keywords
Metals; Chemical synthesis; Electron microscopy; Photoelectron spectroscopy; X-ray diffraction; Microstructure; Surface properties
Categories
Funding
- Centre for Environmental Risk Assessment and Remediation (CERAR, University of South Australia)
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE)
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This study reports the synthesis, characterisation 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 characterisations. In addition, comparing with Fluka ZVI, this lab made nZVI has much higher reactivity towards Pb2+ and within just 15 min 99.9% removal can be reached. This synthesized nano-ZVI material has shown great potential for heavy metal immobilization from wastewater. (C) 2010 Elsevier Ltd. All rights reserved.
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