期刊
APPLIED CLAY SCIENCE
卷 53, 期 4, 页码 716-722出版社
ELSEVIER
DOI: 10.1016/j.clay.2011.06.010
关键词
Zerovalent iron; Bentonite; Orange II; Decolourization
资金
- 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)
Nano zerovalent iron (Fe-0) was reported as an effective material for azo dye removal, however, similar to other nano-materials, ultra-fine powder has a strong tendency to agglomerate into larger particles, resulting in an adverse effect on both effective surface area and catalyst performance. Here we report the preparation of nano sized Fe-0 particles dispersed onto the surface of natural bentonites and their ability to decolourize orange II (OII). X-ray diffraction was used to study the sample phases while scanning electron microscopy and transmission electron microscopy were used to study the morphological changes. Spherical individual Fe-0 particles were observed after dispersion onto bentonites, and these samples were used for OII decolourization over a wide pH range. Higher reactivity was attributed to the good dispersion of Fe-0 particles on clay mineral surface. This study has great significance in providing novel modified clay based catalysts for the decolourization of azo dye contaminants from wastewater. (C) 2011 Elsevier B.V. All rights reserved.
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