Degradation of Acid Orange 7 by Gliding Arc Discharge Plasma in Combination with Advanced Fenton Catalysis

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• 作者：ChangMing Du ; LuLu Zhang ; Jing Wang ; ChuangRong Zhang ; HongXia Li and Ya Xiong
• 关键词：Gliding arc discharge ; Plasma ; Fenton reaction ; Acid Orange 7 ; Degradation
• 刊名：Plasma Chemistry and Plasma Processing
• 出版年：2010
• 出版时间：December 2010
• 年：2010
• 卷：30
• 期：6
• 页码：855-871
• 全文大小：723.9 KB

文摘

A new plasma–catalysis process of gliding arc discharge (GAD) plasma with zero–valent iron (ZVI) was examined. Because GAD plasma creates an acidic environment, solid iron releases ferrous ions which act as a catalyst for the decomposition of the hydrogen peroxide. A comparative study of the catalytic effects between Fe2+ and Fe0 in GAD plasma was investigated. The decolorization reactions of Acid Orange 7 (AO7) followed pseudo–first–order kinetics. And the rate constants for the process of GAD with ZVI was increased by 30 % and by 19 % , respectively, compared with the process of GAD alone and the process of GAD with ferrous. The investigations of solution pH and hydrogen peroxide both demonstrated that the GAD plasma induced conditions are much suitable for advanced Fenton reactions. The corrosion of ZVI in GAD plasma can give continuous ferrous ions to sustain Fenton reaction. Also, ZVI was demonstrated to have favorable reusable feature.