垂直磁场对DBD降解亚甲基蓝模拟废水的影响  

Effect of Vertical Magnetic Field on Degradation of Methylene Blue Wastewater by DBD Plasma

作　　者：卢洪伟 金东翰[1] 查学军 LU Hongwei;JIN Donghan;ZHA Xuejun(College of Science,Donghua University,Shanghai 201620;Magnetic Confinement Fusion Research Center,Ministry of Education,Donghua University,Shanghai 201620)

机构地区：[1]东华大学理学院,上海201620 [2]东华大学磁约束核聚变教育部研究中心,上海201620

出　　处：《高压电器》2023年第2期140-146,共7页High Voltage Apparatus

基　　金：东华大学中央高校基本科研业务费专项资金(16D110918,17D110910,19D110914,20D110910);国家自然科学基金(11205029)。

摘　　要：研究了垂直磁场对介质阻挡放电等离子体处理亚甲蓝模拟废水的影响。磁场的方向与电场方向垂直,研究发现垂直磁场可以引起电子的回旋运动和漂移运动,使其电子在气隙空间中的保留时间和运动轨迹延长,电子与空气分子和水分子的碰撞概率增加,可以提升等离子体的均匀性和化学活性,提高亚甲基蓝降解过程中的能量利用效率,更有效地降解亚甲基蓝模拟废水。研究结果表明:在500~2 000 Gs垂直磁场条件下,利用介质阻挡放电等离子体降解亚甲基蓝模拟废水,可以使亚甲基蓝的降解率比没有磁场条件下提高10%左右。同等条件下,磁场强度越强,亚甲基蓝的降解率和能量效率越高。The effect of a vertical magnetic field on the degradation of methylene blue waste water treated by DBD plasma is studied. The direction of magnetic field is perpendicular to that of electric field. It is found by the study that vertical magnetic field could induce the cyclotron and drift motions of electrons,make the retention time and motion trajectory of its electron in air-gap space longer. The increase of collision probability of electron with air molecule and water molecule can enhance uniformity and chemical activity of plasma,improve energy application efficiency of methylene blue during the degradation period and effectively degrade methylene blue waste water. The study result shows that under the vertical magnetic field condition of 500~2 000 Gs,the use of dielectric barrier discharge plasma to degrade methylene blue waste water can make the methylene blue degradation rate improve about 10% than that without magnetic field condition. Under the same condition,the stronger the magnetic field strength is,the higher the degradation rate and energy efficiency of methylene blue.

关 键 词：低温等离子体 介质阻挡放电 磁场 亚甲基蓝 废水处理 

分 类 号：X703[环境科学与工程—环境工程]