磁性易分离CuFe_(2)O_(4)/坡缕石活化过硫酸盐降解罗丹明B  

Degradation of Rhodamine B by Magnetic Separation of CuFeO/Palygorskite Activated Persulfate

作　　者：陆艳侠[1,2] 黄春 胡真虎 LU Yanxia;HUANG Chun;HU Zhenhu(School of City Construction,Lu*an Vocational Technical College,Lu*an 237158,China;College of Civil Engineering,Hefei University of Technology,Hefei 230000,China)

机构地区：[1]六安职业技术学院城市建设学院,安徽六安237158 [2]合肥工业大学土木与水利工程学院,安徽合肥230000

出　　处：《环境科学与技术》2020年第11期76-81,共6页Environmental Science & Technology

基　　金：安徽省教育厅“2019年高校优秀青年骨干人才国内访学研修”项目(gxgnfx2019119);安徽省质量工程项目大规模在线开放课程(MOOC)示范项目(2019mooc411)。

摘　　要：该文采用新型磁性易分离的CuFe_(2)O_(4)/坡缕石(CuFe_(2)O_(4)/Pal)活化PMS,实现了RhB的高效降解。文章考察了催化剂投加量、PMS浓度、初始pH值、RhB的初始浓度等因素对RhB降解的影响。结果表明:当初始pH为3.0,RhB浓度为10 mg/L,催化剂投加量为0.3 g/L,PMS浓度为0.1 g/L时,降解120 min,RhB的降解效率为99.99%。CuFe_(2)O_(4)/Pal活化PMS降解RhB符合伪一阶动力学模型。通过自由基淬灭实验鉴定结果表明,在CuFe_(2)O_(4)/Pal+PMS体系中1O2和O2·-是降解RhB的主要自由基。稳定性分析实验表明:催化剂具有很好的稳定性,循环使用4次,RhB的降解效率都可以达到91%以上。A new type of magnetically easily separated CuFe_(2)O_(4)/palygorskite(CuFe_(2)O_(4)/Pal)is used to activate PMS to achieve efficient degradation of RhB.The effects of catalyst dosage,PMS concentration,initial pH value,and initial concentration of RhB on the degradation of RhB were investigated.The results showed that when the initial p H was 3.0,the RhB concentration was 10 mg/L,the catalyst dosage was 0.3 g/L,and the PMS concentration was 0.1 g/L,degradation for 120 minutes,and the degradation efficiency of RhB was 99.99%.The degradation of RhB by PMS activated by CuFe_(2)O_(4)/Pal conforms to the pseudo first-order kinetic model.The results of free radical quenching experiments show that in the CuFe_(2)O_(4)/Pal+PMS system,1 O2 and O2·-are the main free radicals that degrade RhB.Stability analysis experiments show that the catalyst has good stability.After four cycles of use,the degradation efficiency of RhB can reach more than 91%.

关 键 词：过一硫酸盐 CuFe_(2)O_(4)/坡缕石 活化降解 罗丹明B 

分 类 号：X703[环境科学与工程—环境工程]