气液混合脉冲放电体系中偶氮染料的脱色效果  

Decoloration of azo dye in a hybrid gas-liquid pulsed discharge system

作　　者：王慧娟[1,2] 储金宇[1] 肖思思[1] 吴春笃[1] 

机构地区：[1]江苏大学环境学院,镇江212013 [2]江苏大学现代农业装备与技术省部共建教育部重点实验室,镇江212013

出　　处：《环境工程学报》2011年第11期2442-2446,共5页Chinese Journal of Environmental Engineering

基　　金：中国博士后科学基金资助项目(20110491353);江苏大学高级专业人才科研启动基金资助项目(08JDG041);国家自然科学基金资助项目(203770066)

摘　　要：为了深入探究水包气式气液混合脉冲放电体系中各参数对有机物降解效果的影响,建立了多针-板电极形式的气液混合脉冲放电等离子体体系,以典型的偶氮染料——酸性橙Ⅱ(AO7)为目标物,考察该体系中影响染料脱色效果的关键因素。研究结果表明,气液混合脉冲放电体系中与脉冲电源输入功率有关的因素(脉冲电压峰值和脉冲频率)对AO7脱色效果影响明显。随着脉冲电压峰值和脉冲频率的增加,AO7溶液的脱色效率和相应的准一级降解动力学常数增加。在较高的脉冲电压峰值(30 kV)和脉冲频率(75 Hz)条件下,10 mg/L AO7溶液的脱色效率和准一级降解动力学常数分别达到了92.7%和3.50×10-2/min。同时,研究证明酸性溶液条件较利于染料脱色。In order to explore in depth the effects of parameters, such as electric parameters （pulsed voltage, pulse frequency and pulse power） , gas parameters （gas varieties and gas bubbling rate） and solution parameters （initial pH value and conductivity value） etc. , in the hybrid gas-liquid pulsed discharge plasma system on organic compounds degradation, a multi-needle-to-plate hybrid gas-liquid pulsed discharge plasma system was established. In the research, the typical azo dye Acid Orange 7 （AO7） was chosen as the target pollutant and an experimental system was set up to review the key factors for AO7 decoloration in the hybrid gas-liquid pulsed discharge plasma system. The obtained results reveal that the factors concerned with the input power of the pulsed power supply, such as pulse voltage peak value and pulse frequency, have distinct effect on the decol- oration of AOT. With the increase of the pulse voltage peak value and the pulse frequency, the decoloration rate of AO7 and the pseudo-first-order kinetic constant of AO7 oxidation increased. Under the condition of 30 kV pulse voltage peak value, 50 Hz pulse frequency, and 5 L/min air bubbling rate, the decoloration rate and the pseudo-first-order kinetic constant of the AO7 solution with 10 mg/L reached 92.7% and 3.50 × 10^-2/min, respectively. Furthermore, the effect of the initial solution condition （pH value） was also considered. The results prove that the acid solution condition is favorable for the dye decoloration and the corresponding values of decoloration rate and kinetic constant are higher.

关 键 词：气液混合 脉冲放电 等离子体酸性橙Ⅱ 脱色 动力学分析 

分 类 号：X703.1[环境科学与工程—环境工程]