摘要
基于光磁耦合试验系统,利用新型复合磁性光催化剂,研究亚甲基蓝废水的降解性能,并讨论磁场强度、旋转速度、反应时间以及催化剂投加量对光磁耦合反应的影响.结果表明:旋转磁场能够显著加强光催化降解亚甲基蓝效果,当磁场强度为50 m T,转速为70 r·min^(-1),反应时间为120min,催化剂投加量为1.2 g·L^(-1)条件下,光磁耦合处理系统对初始质量浓度为10 mg·L^(-1)亚甲基蓝溶液的降解率为93.02%.通过对反应前后溶液的紫外-可见光扫描,发现经过光磁耦合处理系统作用反应后的溶液中,偶氮键与苯环特征峰均已消失,大部分亚甲基蓝得到有效降解.
The photocatalytic degradation of methylene blue in waste water was investigated by new composite magnetic photocatalyst of magnetic field coupled with photocatalytic reaction test system.The influence factors of magnetic field strength,rotating speed,reaction time and dosage of photocatalyst on the rotating magnetic field coupled with photocatalytic degradation were investigated.The results show that rotating magnetic field can significantly enhance photocatalytic degradation of methylene blue.Under the reaction conditions with magnetic field strength of 50 m T,rotating speed of 70 r·min^(-1),photocatalyst dosage of 1.2 g·L^(-1)for 120 min and initial concentration of 10 mg·L^(-1),the methylene blue solution degradation rate reaches 93.02%.UV-vis spectra comparison of methylene blue solution before and after reaction indicates that azo bond and benzene ring disappear after rotating magnetic field coupled with photocatalytic reaction.The results show that most of methylene blue is effectively degraded.
作者
吴春笃
郑坤
解清杰
白戈
Wu Chundu;Zheng Kun;Xie Qingjie;Bai Ge(School of Environment and Safety Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;Yangzhou Polytechnic Co11ege,Yangzhou,Jiangsu 225000,China;China Petroleum Pipeline Engineering Corporation,Langfang,Hebei 065000,China)
出处
《江苏大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2015年第3期368-372,共5页
Journal of Jiangsu University:Natural Science Edition
基金
江苏高校水处理技术与材料协同创新中心项目
关键词
亚甲基蓝
旋转磁场
光催化
ZNO
光磁耦合
methylene blue
rotating magnetic field
photocatalytic
zinc oxide
magnetic field coupled with photocatalytic degradation
作者简介
吴春笃(1962-),男,浙江温州人,教授,博士生导师(wucd@ujs.edu.cn),主要从事环境科学与工程研究;郑坤(199l-),男,江苏淮安人,硕士研究生(978568395@qq.com),主要从事环境工程研究.
