Electrical Characteristics of Pulsed-Discharge Plasma for Decoloration of Dyes in Water
Electrical Characteristics of Pulsed-Discharge Plasma for Decoloration of Dyes in Water
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DOI：
10.1109/tps.2015.2389238
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发表时间：
2015-01
影响因子：
1.5
通讯作者：
N. Lu;Yingchun Feng;Jie Li;K. Shang;Yan Wu
中科院分区：
文献类型：
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作者：
N. Lu;Yingchun Feng;Jie Li;K. Shang;Yan Wu
系统研究了脉冲放电等离子体对水中染料脱色的电特性，以期深入了解放电过程。选择亚甲基蓝（MB）染料水作为目标对象。放电行为被发现取决于电源电压，MB溶液的电导率，和脉冲形成能力。电源电压与初始电容电压之间存在较强的正线性关系。当电源电压为50 V时，注入能量最大，注入效率约为85%。MB溶液的电导率对脉冲形成电容器的伏安特性和放电时间有明显的影响。随着脉冲形成能力的增加，脉冲电流显著增加，而对脉冲电压影响不大。通过增大空气流量和减小电极间距，可以使亚甲基蓝溶液中的脉冲电晕放电转变为火花放电。提高脉冲形成能力和脉冲频率可显著加快溶液中亚甲基蓝的脱色速率。为脉冲放电等离子体技术在染料废水处理中的应用提供参考。
The electrical characteristics of pulsed-discharge plasma for decoloration of dyes in water were systematically investigated with a view toward getting insight into discharge process. Methylene blue (MB) dye water was selected as the target object. The discharge behavior was found to depend on the power supply voltage, conductivity of MB solution, and pulse-forming capacity. A strong positive linear relationship existed between power supply voltage and initial capacitor voltage. The injection energy per pulse increased when increasing the power supply voltage and a maximal energy efficiency of injection of approximately 85% was obtained at power supply voltage of 50 V. The conductivity of MB solution had appreciable impact on the voltage-current characteristics and discharge time of pulse-forming capacitor. Remarkable increase of pulse current was observed as the pulse-forming capacity increasing, while it had slight effect on the pulse voltage. The pulsed corona discharge in MB solution could change into spark discharge by way of increasing the air flow rate and reducing the electrode distance. Increasing pulse-forming capacity and pulse frequency significantly accelerated the decoloration rate of MB in solution. This paper is expected to provide reference for improving the application of pulsed-discharge plasma in treating dye solution.