微等离子弧放电催化水处理技术的研究

采用钛为阳极的微等离子弧放电技术,研究了在模拟废水处理中放电催化效应及其机理,发现该技术对甲基橙有好的放电催化处理效果.甲基橙的脱色程度与峰值电压、脉冲频率、占空比、阳极电极面积等有关.在0.3mol·L-1的H3PO4电解液中,在峰值电压为550V、脉冲频率200Hz,占空比1∶180、阳极电极面积50mm×50mm条件下,20min内600mL、20mg·L-1的甲基橙溶液脱色率达90%.实验结果表明,该放电催化体系具有协同效果好、能效高、反应器设计要求简单等特点,是一种有发展前景的水处理新技术.

Study on the micro-plasma-arc discharge catalysis in wastewater treatment

The effect and mechanism of plasma catalysis of micro-plasma-arc discharge with Ti anode on the simulated wastewater treatment was studied. The degradation of methyl orange was high, which was related with the peak value, pulse frequency and duty circle of positive pulse and anode area. Under the conditions of peak-value voltage 550V, pulse frequency 200 Hz, duty circle of positive pulse 1:180, anode area 50mm×50mm, and reaction time 20 min in H₃PO₄ electrolyte (0.3mol·L^-1), the decolorization of methyl orange (600mL, 20mg·L^-1) was 90%. It was found that the micro plasma and the TiO₂ catalyzer coordinated well at the Ti anode during discharge, the energy efficiency was good and the reactor was simple. It could be believed that the prospect of the technology of micro-plasma-arc discharge catalysis is fine in water treatment.