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

摘要：

The photochemical decolorization of a azo dye direct red 4BS on α-Fe2O3 in the presence of H2O2 and visible light was investigated.The influence of H2O3 dosage,α-Fe2O3 dosage,solution pH was studied.The decolorization of 4BS was attributed to the forming surface complex between 4BS and α-Fe2O3 which facilitates the electron transfer from α-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 α-Fe2O3 was critical to affect the decolorization efficiency.

关键词： α-Fe2O3 hydrogen peroxide photochemical decolorization 4BS

作者: TANG Yuchao HUANG Xianhuai ZHANG Haiping YU Hanqing

作者单位: Department of Environmental Science and Engineering,Anhui University of Architecture,Hefei 230022,Ch Department of Environmental Science and Engineering,Anhui University of Architecture,Hefei 230022,Ch Department of Environmental Science and Engineering,Anhui University of Architecture,Hefei 230022,Ch School of Chemistry and Materials Science,University of Science and Technology of China,Hefei,230026

会议类型: 国际会议

会议名称: The 2nd International Conference on Asian-European Environmental Technology and Knowledge Transfer(第二届亚欧环境技术及知识转化国际研讨会)

会议地点: 合肥

会议语种:英文

页码: 536-542

在线出版日期: 2008-06-05（万方平台首次上网日期，不代表论文的发表时间）