阴极等离子体弧光放电法降解甲基紫染料废水研究  

Degradation by cathodic plasma arc discharge of methyl violet in wastewater

作　　者：刘瑞红 张亦凡 金小越[2] 朱明浩[1,2] 杜建成 薛文斌[1,2] LIU Ruihong;ZHANG Yifan;JIN Xiaoyue;ZHU Minghao;DU Jiancheng;XUE Wenbin(Key Laboratory of Beam Technology of Ministry of Education,College of Nuclear Science and Technology,Beijing Normal University,100875,Beijing,China;Beijing Radiation Center,100875,Beijing,China)

机构地区：[1]北京师范大学核科学与技术学院射线束技术教育部重点实验室,北京100875 [2]北京市辐射中心,北京100875

出　　处：《北京师范大学学报（自然科学版）》2020年第6期788-795,共8页Journal of Beijing Normal University(Natural Science)

基　　金：国家自然科学基金项目(51671032);北京市自然科学基金资助项目(2172029);北京市科学技术研究院青年骨干计划资助项目(YC201817)。

摘　　要：阴极等离子体弧光放电降解技术通过在阴极电极上施加高电压,产生液相弧光放电,使废水中的有机物分子快速分解.本文通过改变电压和电解质(Na2SO4/K2SO4/NaCl/KCl)的浓度,采用阴极等离子体弧光放电方法,降解模拟的甲基紫染料废水.利用高效液相色谱仪、紫外-可见光分光光度计分析甲基紫染料的降解过程,并探索降解率与电解质种类的关系,提出甲基紫染料的降解机制.结果表明:SO4^(2-)与阴极放电产生的活性粒子结合而降解较慢;随着废水中Cl^(-)浓度增加,甲基紫的降解率明显提高,当Cl^(-)浓度为0.05 mol·L^(-1)时,在阴极弧光放电与Cl^(-)的协同作用下,甲基紫的降解率在1 min内可达到100%.In cathodic plasma arc discharge degradation technology,arc discharge is produced in liquid after applying high voltage on the cathode electrode,to rapidly decompose organic molecules in wastewater.After applying a range of high voltages to solutions containing electrolytes(Na2SO4,K2SO4,NaCl/KCl)at varied concentrations,high performance liquid chromatography(HPLC),ultraviolet and visible spectrophotometry were performed to follow degradation of methyl violet dye in wastewater.Degradation of methyl violet was found to be slowed by SO4^(2-)to reactive particles released by arc discharge.Degradation became significantly faster with increasing Clconcentration.At Cl^(-)0.05 mol·L^(-1),degradation was complete(100%)within 1 minute,largely due to synergy of arc discharge and presence of high concentration of Cl^(-).

关 键 词：等离子体 高效液相色谱 甲基紫 降解 紫外-可见光分光光度计 

分 类 号：O646.9[理学—物理化学]