LaFe_(0.8)Cu_(0.2)O_(3)活化过一硫酸盐降解对甲酚  

Degradation of p-cresol by LaFe_(0.8)Cu_(0.2)O_(3)-activated peroxymonosulfate

作　　者：刘楠 王国英[1] 郭波[1] 岳秀萍[1] 程成 LIU Nan;WANG Guoying;GUO Bo;YUE Xiuping;CHENG Cheng(College of Environmental Science and Engineering,Taiyuan University of Technology,Jinzhong 030600,China)

机构地区：[1]太原理工大学环境科学与工程学院,山西晋中030600

出　　处：《化工环保》2021年第5期583-588,共6页Environmental Protection of Chemical Industry

基　　金：国家自然科学基金资助项目(u1610105)。

摘　　要：采用溶胶-凝胶法制备了钙钛矿型材料LaFe_(0.8)Cu_(0.2)O_(3),考查了其活化过一硫酸盐(PMS)降解对甲酚的性能和活化机理。实验结果表明,在LaFe_(0.8)Cu_(0.2)O_(3)投加量为2.5 g/L、PMS浓度为5.0 mmol/L、不调节体系pH(pH=5.7)、反应时间为20 min的条件下处理质量浓度为100 mg/L的对甲酚溶液,对甲酚降解率可达88.8%。体系pH在3.0~9.0范围内,LaFe_(0.8)Cu_(0.2)O_(3)均可高效活化PMS降解对甲酚。在该反应体系中,SO^(-)_(4)·和·OH均为活性组分,而SO^(-)_(4)·对对甲酚的降解作用更显著。Cu的掺杂使得Fe(Ⅱ)/Fe(Ⅲ)具有良好的循环效率从而促进PMS的活化。LaFe_(0.8)Cu_(0.2)O_(3)具有良好的重复利用性。LaFe_(0.8)Cu_(0.2)O_(3) perovskite was prepared by sol-gel method.Its activation capability to peroxymonosulfate(PMS)for p-cresol degradation and the activation mechanism were investigated.The experimental results show that under the conditions of LaFe_(0.8)Cu_(0.2)O_(3) amount 2.5 g/L,PMS concentration 5.0 mmol/L,unadjusted system pH(pH=5.7),reaction time 20 min,and p-cresol mass concentration 100 mg/L,the degradation rate of p-cresol can reach 88.8%.LaFe_(0.8)Cu_(0.2)O_(3) can effectively activate PMS to degrade p-cresol in the system pH range of 3.0-9.0.In this reaction system,both SO^(-)_(4)·and·OH are active components,and SO^(-)_(4)·has a more significant effect on degradation of p-cresol.The doping of Cu results good Fe(Ⅱ)/Fe(Ⅲ)cycle efficiency and promotes the activation of PMS.The reusability of LaFe_(0.8)Cu_(0.2)O_(3) is good.

关 键 词：LaFe_(0.8)Cu_(0.2)O_(3) 过一硫酸盐 对甲酚 SO^(-)_(4)· 

分 类 号：X703[环境科学与工程—环境工程]