摘要
A synergistic system of water falling film dielectric barrier discharge(DBD)plasma and persulfate(PS)was set up and used for oxidizing ciprofloxacin(CIP)in water.Results of reactive species formation in the DBD-only system as well as the DBD–PS system verified the PS activation in the DBD system.Influencing factors on CIP degradation and the degradation process were also been studied.The obtained results showed that the presence of PS could greatly improve the degradation and mineralization of CIP and that the degradation efficiency could reach 97.73%after only 40 min treatment with 4 m M PS addition.The increase of PS concentration,the lower CIP concentration,the acidic solution p H and the addition of metal ions(Fe^(2+)and Cu^(2+))enhanced the CIP degradation,while the existence of Cl^(-)and HCO_(3)^(-)had a negative effect.The experiments related to scavenger addition confirmed the contribution of the main reactive species to the CIP oxidation.Three probable degradation pathways were proposed by analyzing the inorganic ions and organic byproducts formed during the CIP degradation.The toxicity evaluation results of the CIP and its intermediates confirmed the effectiveness of the DBD–PS synergistic system.
作者
宋世林
黄玉月
杜彦生
肖思思
韩松
胡坤
张会会
王慧娟
吴春笃
阿琼
Shilin SONG;Yuyue HUANG;Yansheng DU;Sisi XIAO;Song HAN;Kun HU;Huihui ZHANG;Huijuan WANG;Chundu WU;Qiong A(School of the Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,People's Republic of China;Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment,Suzhou 215009,People's Republic of China;Environmental Science Institute of Tibet Autonomous Region,Lhasa 850000,People's Republic of China)
基金
National Natural Science Foundation of China(No.21876070)for their support of this study.
作者简介
王慧娟,E-mail:hjwang@ujs.edu.cn;阿琼,E-mail:xzaqiong@163.com。
