Rapid decolorization of Acid Orange II aqueous solution by amorphous zero-valent iron

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	Rapid decolorization of Acid Orange II aqueous solution by amorphous zero-valent iron
	C. Q. Zhang; Z. W. Zhu; H. F. Zhang; Z. Q. Hu
	2012
发表期刊	Journal of Environmental Sciences-China
ISSN	1001-0742
卷号	24 期号:6 页码:1021-1026
摘要	Some problems including low treatment capacity, agglomeration and clogging phenomena, and short working life, limit the application of pre-treatment methods involving zero-valent iron (ZVI). In this article, ZVI was frozen in an amorphous state through a melt-spinning technique, and the decolorization effect of amorphous ZVI on Acid Orange II solution was investigated under varied conditions of experimental variables such as reaction temperature, ribbon dosage, and initial pH. Batch experiments suggested that the decolorization rate was enhanced with the increase of reaction temperature and ribbon dosage, but decreased with increasing initial solution pH. Kinetic analyses indicated that the decolorization process followed a first order exponential kinetic model, and the surface-normalized decolorization rate could reach 2.09 L/(m(2).min) at room temperature, which was about ten times larger than any previously reported under similar conditions. Recycling experiments also proved that the ribbons could be reused at least four times without obvious decay of decolorization rate and efficiency. This study suggests a tremendous application potential for amorphous ZVI in remediation of groundwater or wastewater contaminated with azo dyes.
部门归属	[zhang, changqin; zhu, zhengwang; zhang, haifeng; hu, zhuangqi] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [zhang, changqin] chinese acad sci, grad sch, beijing 100039, peoples r china.;zhang, hf (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;hfzhang@imr.ac.cn
关键词	Amorphous Zero-valent Iron Acid Orange Ii Decolorization Surface-normalized Decolorization Rate Recycle Azo Dyes Waste-water Zerovalent Iron Reductive Degradation Nanoscale Oxidation Particles Biodegradation Nanoparticles Behavior
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60434
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. Q. Zhang,Z. W. Zhu,H. F. Zhang,et al. Rapid decolorization of Acid Orange II aqueous solution by amorphous zero-valent iron[J]. Journal of Environmental Sciences-China,2012,24(6):1021-1026.
APA	C. Q. Zhang,Z. W. Zhu,H. F. Zhang,&Z. Q. Hu.(2012).Rapid decolorization of Acid Orange II aqueous solution by amorphous zero-valent iron.Journal of Environmental Sciences-China,24(6),1021-1026.
MLA	C. Q. Zhang,et al."Rapid decolorization of Acid Orange II aqueous solution by amorphous zero-valent iron".Journal of Environmental Sciences-China 24.6(2012):1021-1026.