Degradation of Alizarin Red by Hybrid Gas-Liquid Dielectric Barrier Discharge
Degradation of Alizarin Red by Hybrid Gas-Liquid Dielectric Barrier Discharge
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DOI：
10.1088/1009-0630/16/11/07
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发表时间：
2014-02
影响因子：
1.7
通讯作者：
L. Qifu
中科院分区：
文献类型：
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作者：
L. Qifu
基于介质阻挡放电 (DBD) 的系统具有改进的放电稳定性和均匀性，用于降解茜素红 (AR)。 DBD系统的这种特殊结构的特点是高压电极被石英管覆盖并部分浸入水中，并直接使用水作为接地电极。实现了从传统 DBD 结构的丝状模式到这种等离子体放电配置的半均匀模式的转变。等离子体的光谱以紫外-A 辐射区域中的 N2 分子线为主。该系统中 AR 的等离子体降解表现出伪一级反应动力学。在有利条件下处理14 min后AR降解率达到95%左右。碱性条件有利于AR的降解。溶液电导率的增加、输入功率和氧气鼓泡的使用可以增强 AR 的降解。
A system based on dielectric barrier discharge (DBD) with improved discharge stability and homogeneity was used for the degradation of Alizarin Red (AR). This special structure of the DBD system is characterized by the high voltage electrode, which is covered with a quartz tube and partially immersed in water, and by directly using the water as the ground electrode. A transition was realized from the filamentary mode for the conventional structure of the DBD to the semi-homogeneous mode for such a configuration of the plasma discharge. The spectra of plasma are dominated by N2 molecular lines in the ultraviolet-A radiation region. Plasma degradation of AR in this system exhibited pseudo-first-order reaction kinetics. The degradation rate of AR reached 95% or so after 14 min treatment under favorable conditions. Alkaline conditions are favorable for the degradation of AR. The increase of conductivity of the solution, input power and usage of oxygen bubbling could enhance AR degradation.