Rapid decolorization of water soluble azo-dyes by nanosized zero-valent iron immobilized on the exchange resin

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Rapid decolorization of water soluble azo-dyes by nanosized zero-valent iron immobilized on the exchange resin
	Zhao ZongShan ; Liu JingFu ; Tai Chao ; Zhou QunFang ; Hu JingTian ; Jiang GuiBin
刊名	SCIENCE IN CHINA SERIES B-CHEMISTRY
	2008-02
卷号	51 期号:2 页码:186-192
关键词	azo-dye nanosized-zero valent iron (NZVI) decomposition packing column
英文摘要	Nanosized zero-valent iron (NZVI) supported on the cation exchange resin was synthesized and applied to decompose some water soluble azo dyes. The decomposition efficiency for azo dyes was evaluated by using the aqueous suspensions and parked column of this material. Batch experiments indicated that this novel material exhibited excellent degradation ability for 0.05 g center dot L(-1)of Acid Orange 7, Acid Orange 8, Acid Orange 10, Sunset Yellow, and Methyl Orange, with decolorization ratio up to 95% in 4 min; pH value was the key factor for degradation and H+ was one of the reactants; adsorption of azo dyes onto the material existed at the beginning but reduced gradually until disappearing completely. For the packed column system, 58%similar to 90% of azo dyes were decomposed in the 1st circle of solution passing through the column, and the adsorption onto the materials could accelerate the degradation azo dyes with the increasing reaction time. During the degradation process, Fe2+, the product of NZVI, was exchanged to the resin again and could be reduced to Fe-0 by KBH4 for reusing. The 10th refreshed NZVI possessed reductive activity up to 90% of the newly systhesized NZVI. Decomposing pollutants in the aqueous solution with columns packed with NZVI immobilized on the cation exchange resin is a promising technology that can solve the reclaiming and refreshing problem of NZVI.
WOS记录号	WOS:000252470300013
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/21985]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Zhao ZongShan,Liu JingFu,Tai Chao,et al. Rapid decolorization of water soluble azo-dyes by nanosized zero-valent iron immobilized on the exchange resin[J]. SCIENCE IN CHINA SERIES B-CHEMISTRY,2008,51(2):186-192.
APA	Zhao ZongShan,Liu JingFu,Tai Chao,Zhou QunFang,Hu JingTian,&Jiang GuiBin.(2008).Rapid decolorization of water soluble azo-dyes by nanosized zero-valent iron immobilized on the exchange resin.SCIENCE IN CHINA SERIES B-CHEMISTRY,51(2),186-192.
MLA	Zhao ZongShan,et al."Rapid decolorization of water soluble azo-dyes by nanosized zero-valent iron immobilized on the exchange resin".SCIENCE IN CHINA SERIES B-CHEMISTRY 51.2(2008):186-192.