脉冲电晕放电等离子体降解含4-氯酚废水

考察了多种因素对高压脉冲电晕放电等离子体降解废水中4-氯酚效果的影响，同时对4-氯酚降解过程动力学进行了研究.提高脉冲电压峰值和气体的流量以及降低废水溶液的电导率均可提高4-氯酚的降解效果，而醇类化合物的存在将明显降低4-氯酚的降解率.4-氯酚的降解过程符合一级反应，降解速率常数与降解温度的关系符合Arrhenius公式.当废水的初始pH值为7.0、电导率为80μS•cm^-1、脉冲电压峰值为30kV、放电频率为60Hz、放电电极直径为0.6mm、放电距离为3.0cm时，指前因子A=1.365×10-2min^-1，实验活化能E_a= 5.129kJ•mol^-1.得到了降解速率常数与脉冲电压峰值、放电频率、放电距离和初始氧气流量的关系.

DEGRADATION OF 4-CHLOROPHENOL IN AQUEOUS SOLUTION WITH PULSED HIGH-VOLTAGE DISCHARGE PLASMA

The effects of some factors on degradation of 4-chlorophenol in waste water with pulsed high-voltage discharge plasma were studied. Furthermore,the kinetics of degradation of 4-chlorophenol was also studied. The degradation efficiency of 4-chlorophenol could be raised considerably by increasing peak voltage, bubbling rate of gas and by decreasing electric conductivity of waste water. The presence of alcohol would decrease the degradation efficiency of 4-chlorophenol. The degradation of 4-chlorophenol in waste water with pulsed high-voltage plasma was a first-order reaction. The correlation between degradation rate constant k and reaction temperature T could be expressed by Arrhenius equation. At initial pH 7.0, electric conductivity of waste water 80μS•cm^-1,peak voltage 30kV,discharge frequency 60Hz,the diameter of discharge electrode 0.6mm,and discharge distance were 3.0cm, A was 1.365×10^-2min^-1 and experimental activation energy E_a was 5.129kJ•mol^-1. The degradation rate constant k could also be expressed.