平行磁场对介质阻挡放电降解亚甲基蓝废水影响

以亚甲基蓝溶液作为模拟印染废水,通过改变放电电压、充气速率、处理时间等初始条件,考察了亚甲基蓝溶液的pH、电导率、COD等参数的变化,并借助高效液相色谱仪分析亚甲基蓝部分降解产物的浓度变化,研究了介质阻挡放电条件下,平行磁场的加入对亚甲基蓝降解效果的影响。实验结果表明:外加磁场所产生的洛伦兹力会影响等离子体中电子的行为,限制放电空间中电子的横向运动,增加高能电子与其他粒子的碰撞概率,从而使等离子体的化学活性增强,从而可以提高亚甲基蓝降解率5%~10%。

Effect of Parallel Magnetic Field on Degradation of Methylene Blue Wastewater by Dielectric Barrier Discharge

The methylene blue solution was used as a simulated printing and dyeing wastewater,the changes in the pH,conductivity,COD and other parameters of the methylene blue solution were investigated by changing the initial conditions such as discharge voltage,aeration rate,and treatment time.The concentration changes of partial degradation products of methylene blue were analyzed with the help of high performance liquid chromatograph(HPLC),and the effect of parallel magnetic field on the degradation effect of methylene blue under the condition of dielectric barrier discharge was studied.The results showed that,the Lorentz force generated by the external magnetic field would affect the behavior of electrons in the plasma,limited the lateral movement of electrons in the discharge space,and increased the collision probability of high-energy electrons with other particles.Thereby the chemical activity of the plasma was enhanced and the degradation rate of methylene blue increased by 5%to 10%.