Degradation of indigo carmine using bipolar pulsed dielectric barrier discharge (DBD) in the water-air mixture

Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting. Pub Date : 2004-11-01 DOI:10.1109/IAS.2004.1348415

Zhang Ruo-bing, L. Guo-feng, W. Van

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引用次数: 7

Abstract

Oxidative decolonization of indigo carmine by bipolar pulsed DBD in the water-air mixture was studied using the dynamic UV-Vis spectrum of the solution. Effects of various parameters such as gas flow rate, solution conductivity, pulse repetitive rate and etc., on color removal efficiency of dying wastewater were investigated. Concentrations of gas phase O/sub 3/ and aqueous phase H/sub 2/O/sub 2/ under various conditions were measured. Experimental results show that air bubbling facilitates the breakdown of water and promotes generation of chemically active species. Color removal efficiency of IC solution can be greatly improved by the air aeration under various solution conductivities. Decolonization efficiency increases with the increase of the gas flow rate, and decreases with the increase of the initial solution conductivity. A higher pulse repetitive rate and a larger pulse capacitor Cp are favorable for the decolonization process. Ozone and hydrogen peroxide formed decreases with the increase of initial solution conductivity. In addition, preliminary analysis of the decolonization mechanisms is given.

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双极脉冲介质阻挡放电(DBD)在水-空气混合物中降解靛蓝胭脂红

利用动态紫外可见光谱研究了双极脉冲DBD在水-空气混合物中对靛蓝胭脂红的氧化脱植作用。考察了气体流速、溶液电导率、脉冲重复率等参数对印染废水脱色效果的影响。测定了不同条件下气相O/sub - 3/和水相H/sub - 2/O/sub - 2/的浓度。实验结果表明，空气鼓泡有利于水的分解，促进化学活性物质的生成。在不同的溶液电导率下进行曝气，可大大提高IC溶液的去色效率。非殖民化效率随气体流速的增加而增加，随初始溶液电导率的增加而降低。较高的脉冲重复率和较大的脉冲电容Cp有利于非殖民化过程。臭氧和过氧化氢的生成随初始溶液电导率的增加而减少。此外，还对非殖民化机制作了初步分析。

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Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.

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