Synthesis and characterization of montmorillonite supported zero valent iron for transformation of nitroaromatic in groundwater
In this study montmorillonite was utilized as matrix to synthesize nanosize and sub-nanosize zero valent iron (ZVI), which was applied to degrade organic and inorganic contaminant in groundwater. The synthesized clay supported ZVI has been characterized by power Xray diffraction (XRD), transmission electron microscopy (SEM), X-ray energy dispersive spectroscopy (X-EDS) and X-ray photoelectron spectroscopy (XPS). The results revealed nanosize (1～50 nm) ZVI particles were formed on the external surface and sub-nanosize (around 0.5 nm) ZVI cluster resided in the interlayers surface of montmorillonite. After reduction by borohydride, the layered structures of montmorillonite are less evident, and the clay platelets in general appear less stacking, but the basically structure still maintained. This kind of montmorillonite supported ZVI exhibit higher reactivity and efficiency compared to other previously reported forms of ZVI as indicated by the reduction of nitroaromatic. Over 90% of nitrobenzene (0.65 mM) was degraded within one minute and aniline was the final product, and Oneelectron reduction potentials of NACs is an crucial parameter for reduction of a series of NACs in a given system.
zero valent iron (ZVT) montmorillonite clay groundwater nitroaromatic
Hanzhong Jia Cuiping Wang Cheng Gu Hui Li Brian J. Teppen Stephen A. Boyd Cunyi Song
Department of environmental engineering, University of Science and technology Beijing, Beijing, 1000 Department of Crop and Soil Sciences, Michigan State University, East Lansing, Michigan 48824, USA Department of environmental engineering, University of Science and technology Beijing, Beijing, 1000
国际会议
2009 Beijing International Environmental Technology Conference(2009北京国际环境技术会议暨第五届“中、德、波环境技术研讨会)
北京
英文
212-224
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）