Degradation of azo and anthraquinone dyes by a low-cost Fe0/air process

doi:10.1016/j.jhazmat.2008.12.021

中山醫學大學機構典藏 CSMUIR > 健康管理學院 > 公共衛生學系暨碩士班 > 期刊論文 > Item 310902500/4420

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Title:	Degradation of azo and anthraquinone dyes by a low-cost Fe0/air process
Authors:	Chang, Shih-Hsien Wang, Kai-Sung Chao, Shu-Ju Peng, Tzu-Huan Huang, Lung-Chiu
Contributors:	中山醫學大學公共衛生學系
Keywords:	Azo dye Anthraquinone dye Zero valent iron Decolorization
Date:	2008-12-03
Issue Date:	2012-08-07T07:08:54Z (UTC)
ISSN:	0304-3894
Abstract:	Degradation of two different kinds of dyes, anthraquinone Reactive Blue 4 (RB4) and azo Reactive Black 5 (RB5), by low-cost zero valent iron (Fe0) in a N2 bubbling system (Fe0/N2 process) and air bubbling system (Fe0/air process) was investigated. The operating parameters, including initial solution pH, dye concentration and Fe0 dose, were also evaluated. The Fe0/air process shows a higher decolorization rate compared to the Fe0/N2 process. Both RB4 and RB5 solutions at 100 mg L−1 were rapidly decolorized by Fe0/air process within 9 and 3 min, respectively, at initial solution pH 3, Fe dose of 50 g L−1 and air flow rate of 5 L min−1. The optimal initial solution pH was 3. The Fe0/N2 process removed only <17% of COD. However, significant COD removals were achieved for RB 4 (87%) and RB5 (43%) by the Fe0/air process after 9 min of treatment. Spectra analysis results indicated that the Fe0/N2 process destroyed only the anthraquinone group (A594) for the RB4 solution and decreased the azo (A596) and naphthalene group (A310) for the RB5 solution. However, the Fe0/air process rapidly removed A594, A370, A296 (anthraquinone group) and A256 (aromatic and dichlorotriazine group) for RB4, and A597 and A310 (naphthalene group) for RB5. The results indicated that the low-cost Fe0/air process is a potential technique for rapid degradation of RB4 and RB5 solutions.
URI:	https://ir.csmu.edu.tw:8080/ir/handle/310902500/4420 http://dx.doi.org/10.1016/j.jhazmat.2008.12.021
Relation:	Journal of Hazardous Materials Volume 166, Issues 2–3, 30 July 2009, Pages 1127–1133
Appears in Collections:	[公共衛生學系暨碩士班] 期刊論文

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