板式介质阻挡放电降解环丙沙星废水的研究  

Research on Degradation of Ciprofloxacin Wastewater by Plate-type Dielectric Barrier Discharge

作　　者：赵庚 尚贞晓[2] 厉建苗 田粟 Zhao Geng;Shang Zhenxiao;Li Jianmiao;Tian Su(Construction Project Environmental Assessment Service Center of Zibo,Zibo 255000,China;College of Resources and Environment Engineering,Shandong University of Technology,Zibo 255049,China;Water Resources Management Office of Zhangdian District,Zibo City,Zibo 255000,China)

机构地区：[1]淄博市建设项目环境评审服务中心,山东淄博255000 [2]山东理工大学资源与环境工程学院,山东淄博255049 [3]淄博市张店区水资源管理办公室,山东淄博255000

出　　处：《山东化工》2021年第9期236-239,共4页Shandong Chemical Industry

摘　　要：采用板式介质阻挡放电(dielectric barrier discharge,DBD)等离子体技术,以环丙沙星(ciprofloxacin,CIP)为目标污染物,在室温下放电降解环丙沙星废水。实验考察了外加功率、pH值、初始浓度等对DBD体系降解CIP的影响,并对CIP的降解中间产物进行了检测,提出了可能的降解路径。研究结果表明:随着外加功率的增加CIP降解率增加,能量效率整体呈现降低的趋势;碱性条件有利于臭氧生成氧化性更强的羟基自由基,CIP的降解率和能量效率高;CIP降解率随着溶液初始浓度的增加而降低,而能量效率逐渐增加;DBD体系中O_(3)和H_(2)O_(2)浓度测定结果表明活性物质在CIP降解过程中发挥了重要作用。通过LC-MS分析,检测出CIP的降解产生了10种中间产物,CIP的降解可能从·OH攻击哌嗪环开始,并通过环破裂反应进一步攻击,产生无机酸离子和有机酸,最终被矿化为CO_(2)和H 2O。In this study,ciprofloxacin(CIP)wastewater was degraded by plate dielectric barrier discharge(DBD)plasma at room temperature.The effects of external power,pH value and initial concentration on the degradation of CIP by DBD system were investigated.The intermediate products of CIP degradation were detected,and the possible degradation path was proposed.The results show that:with the increase of applied power,the degradation rate of CIP increases and the energy efficiency decreases;alkaline condition is conducive to ozone generating hydroxyl radicals with stronger oxidation,and CIP has the highest degradation rate and energy efficiency;CIP degradation rate decreases with the increase of initial concentration of solution,and the energy efficiency increases gradually;The concentration of O_(3)and H_(2)O_(2)in the system showed that the active substances played an important role in the degradation process.Through LC-MS analysis,the degradation of CIP was detected and 10 kinds of intermediate products were produced.The degradation of CIP may start from the attack of piperazine ring by·OH to produce intermediates,which are further attacked by ring rupture reaction to produce inorganic acid ions and organic acids,and finally mineralized into CO_(2)and H 2O.

关 键 词：介质阻挡放电 环丙沙星 降解 

分 类 号：X703[环境科学与工程—环境工程]