垂直磁场对DBD降解亚甲基蓝模拟废水的影响卢洪伟1,2,金东翰1,查学军1,2(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)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500~2000Gs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。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EffectofVerticalMagneticFieldonDegradationofMethyleneBlueWastewaterbyDBDPlasmaLUHongwei1,2,JINDonghan1,ZHAXuejun1,2(1.CollegeofScience,DonghuaUniversity,Shanghai201620;2.MagneticConfinementFusionResearchCenter,MinistryofEducation,DonghuaUniversity,Shanghai201620)Abstract:TheeffectofaverticalmagneticfieldonthedegradationofmethylenebluewastewatertreatedbyDBDplasmaisstudied.Thedirectionofmagneticfieldisperpendiculartothatofelectricfield.Itisfoundbythestudythatverticalmagneticfieldcouldinducethecyclotronanddriftmotionsofelectrons,maketheretentiontimeandmotiontrajectoryofitselectroninair⁃gapspacelonger.Theincreaseofcollisionprobabilityofelectronwithairmoleculeandwatermoleculecanenhanceuniformityandchemicalactivityofplasma,improveenergyapplicationefficiencyofmethyleneblueduringthedegradationperiodandeffectivelydegrademethylenebluewastewater.Thestudyresultshowsthatundertheverticalmagneticfieldconditionof500~2000Gs,theuseofdielectricbarrierdischargeplas⁃matodegrademethylenebluewastewatercanmakethemethylenebluedegradationrateimproveabout10%thanthatwithoutmagneticfieldcondition.Underthesamecondition,thestrongerthemagneticfieldstrengthis,thehigh⁃erthedegradationrateandenergyefficiencyofmethyleneblue.Keywords:low⁃temperaturepla...