doi:10.12202/j.0476-0301.2020131刘瑞红^{1, 2},
张亦凡^{1, 2},
金小越²,
朱明浩^{1, 2},
杜建成^{1, 2},
薛文斌^{1, 2,,}
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，100875，北京
2.北京市辐射中心，100875，北京
基金项目: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)

详细信息

通讯作者:薛文斌（1968—），男，教授，博士生导师. 研究方向：金属材料表面改性. e-mail：xuewb@bnu.edu.cn

中图分类号:O646.9

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出版历程

收稿日期:2020-04-10
网络出版日期:2021-01-09
刊出日期:2020-12-01

Degradation by cathodic plasma arc discharge of methyl violet in wastewater

Ruihong LIU^{1, 2},
Yifan ZHANG^{1, 2},
Xiaoyue JIN²,
Minghao ZHU^{1, 2},
Jiancheng DU^{1, 2},
Wenbin XUE^{1, 2,,}
1. Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, 100875，Beijing， China
2. Beijing Radiation Center, 100875，Beijing ， China



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摘要
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：${\rm{SO}}_4^{2-}$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%．
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
Abstract: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 ${{\rm{SO}}_4^{2-}}$ binding to reactive particles released by arc discharge．Degradation became significantly faster with increasing Cl^? concentration．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^?．
Key words:plasma/
HPLC/
methyl violet/
degradation/
UV-Vis