气氛对降膜介质阻挡放电反应器降解甲基橙的影响

Influences of gases on methyl orange degradation by falling film dielectric barrier discharge reactor

以偶氮染料甲基橙为对象,研究使用降膜介质阻挡放电(DBD)反应器在不同放电气体(氩气、空气、氧气)下的处理效果。结果表明:氧气作DBD放电气氛时,甲基橙处理效果最佳,氩气次之,空气最差。O3、H_2O_2、·OH这3种活性氧粒子对于甲基橙氧化降解起着至关重要的作用,氧气放电体系内3种活性粒子的含量远高于空气放电体系;氩气放电体系内的H_2O_2含量最高;空气放电体系还检测到大量的对甲基橙降解不利的NO_3^-、NO_2^-。

Taking azo dyes methylene organic(MO)as the object,the treatment effect of the falling film dielectric ba-rrier discharge(DBD)reactor under different discharge gases(argon,air,oxygen)has been investigated.The results show that when oxygen is used as DBD the discharge gas,the treatment effect of it on methylene orange is the best,argon the second,and air the worst.Three kinds of active oxygen particles(O3,H2O2,·OH)play a vital role on methy-lene orange oxidation degradation.The contents of the three kinds of active particles in the oxygen discharge system are far higher than that in the air discharge system.The H2O2 content in the argon discharge system is the highest.In air discharge system a great deal of NO3-and NO2-which count against methylene orange are also detected.