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
刊名	Journal of Environmental Sciences-China
	2012
卷号	24 期号:6 页码:1021-1026
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
ISSN号	1001-0742
中文摘要	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.
原文出处	://WOS:000305316700007
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/60434]
专题	金属研究所_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.