摘要
利用针-筒式反应器进行高压脉冲电晕放电降解液相苯酚的试验,研究Fe2+、脉冲电压峰值、脉冲频率、曝气及pH等对苯酚降解的影响.结果发现,苯酚降解率随着Fe2+添加量的增加先升高后降低,最佳Fe2+的添加量为0.015mmol/L;提高脉冲电压峰值、脉冲频率、曝气体积流量和pH均可达到提高苯酚降解率的效果,其经济性、适应性最佳值如下:脉冲电压峰值为40kV,脉冲频率为180Hz,曝气O2的体积流量为6L/min,此条件下苯酚降解率可达到84.8%;偏碱性环境有利于苯酚的降解;曝气种类对苯酚降解率有较大影响,降解率由高到低依次是氩气、氧气、氮气.当曝气源为氩气时,苯酚的降解率可达到98.1%.
The experiment of aqueous phenol degradation was conducted using high voltage pulsed corona discharge in a needle-cylindrical reactor.The influences of Fe2＋ addition,pulsed voltage peak value,pulsed frequency,additional gas and pH value on the degradation of phenol were investigated.Results showed that phenol degradation rate firstly increased but then decreased with the increase of Fe2＋ addition.The optimal concentration of Fe2＋ was 0.015 mmol/L.The degradation rate of phenol improved with the increase of the pulsed voltage,the pulsed frequency,the flow of the additional gas and the pH value.40 kV peak pulsed voltage,180 Hz pulsed frequency,6 L/min additional oxygen gas were the best economical reactive conditions,and the phenol degradation rate reached 84.8%.Alkaline environment was beneficial to the degradation of phenol.The species of additional gases greatly influenced the phenol degradation.The degradation rates of phenol from high to low were with additional gas of Ar,O2 and N2.The degradation rate of aqueous phenol reached 98.1% with additional gas of Ar.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2010年第2期310-314,共5页
Journal of Zhejiang University：Engineering Science
基金
国家"973"重点基础研究发展计划资助项目(2006CB200303)
浙江省自然科学基金资助项目(Y507079)
浙江省教育厅资助项目(Y200702725)
关键词
脉冲电晕
液相放电
苯酚
降解
pulsed corona
aqueous discharge
phenol
degradation
