Degradation of organic pollutants by visible light synergistic electro-Fenton oxidation process

被引：0
作者：
ShuLian Wang
Qi Wang
YanFen Fang
YingPing Huang
机构：
[1] China Three Gorges University,Engineering Research Center of Eco
[2] Institute of Plasma Physics,environment in Three Gorges Reservoir Region, Ministry of Education
来源：
Science China Chemistry | 2013年 / 56卷
关键词：
synergistic electro-Fenton oxidation; visible light; hydroxyl radical;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Visible light irradiation combined with homogeneous iron and/or hydrogen peroxide to degrade organic dye rhodamine B (RhB) and small molecular compound 2,4-dichlorophenol (2,4-DCP) in a home-made bottle reactor was assessed. The concentration of oxidize species, Fe3+ and Fe2+ were determined during the degradation process. The results demonstrated that visible light irradiation combined with electro-Fenton improved the degradation efficiency. Moreover, both RhB and 2,4-DCP were mineralized during visible light synergistic electro-Fenton oxidation process. 95.0% TOC (total organic carbon) removal rate of RhB occurred after 90 min and 96.7% of COD (chemical oxygen demand) removal rate after 65 min of irradiation. 91.3% TOC removal rate of 2,4-DCP occurred after 16 h of irradiation and 99.9% COD removal rate occurred after 12 h of illumination. The degradation and oxidation process was dominated by the hydroxyl radical (·OH) generated in the system. Both the impressed electricity and dye sensitization by visible light facilitated the conversion between Fe3+ and Fe2+, thus, improving Fenton reaction efficiency.
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页码：813 / 820
页数：7
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