Photochemical Decolorization of Direct-red 4BS in the Presence of H2O2 and α-Fe2O3 under Visible Light Irradiation

被引：0

作者：

Tang Yuchao ^{[1
]}

Huang Xianhuai ^{[1
]}

Zhang Haiping ^{[1
]}

Yu Hanqing

机构：

[1] Anhui Univ Architecture, Dept Environm Sci & Engn, Hefei 230022, Peoples R China

来源：

PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON ASIAN-EUROPEAN ENVIRONMENTAL TECHNOLOGY AND KNOWLEDGE TRANSFER | 2008年

关键词：

alpha-Fe2O3; hydrogen peroxide; photochemical decolorization; 4BS;

D O I：

暂无

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The photochemical decolorization of a azo dye direct red 4BS on alpha-Fe2O3 in the presence of H2O2 and visible light was investigated. The influence of H2O2 dosage, alpha-Fe2O3 dosage, solution pH was studied. The decolorization of 4BS was attributed to the forming surface complex between 4BS and alpha-Fe2O3, which facilitates the electron transfer from alpha-Fe2O3 to azo bond. Substantially enhanced by increasing H2O2 dosage up to 7 ml/l, beyond which concentration no negative results on decolorization efficiency was observed. No mineralization of 4BS occurred but only chromogenic group was destroyed in the photo- chemical reaction. Chemical adsorption of 4BS on alpha-Fe2O3 was critical to affect the decolorization efficiency.

引用

页码：536 / 542

页数：7

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