Fe/Mn-PAC催化剂的制备及其催化臭氧氧化降解活性艳蓝KN-R性能  

PREPARATION OF Fe/Mn-PAC CATALYSTS AND DEGRADATION OF REACTIVE BRILLIANT BLUE KN-R BY CATALYTIC OZONATION

作　　者：吴鑫明 安浩 赵俊宇 欧子旋 郝粱山 李超[1,2] WU Xinming;AN Hao;ZHAO Junyu;OU Zixuan;HAO Liangshan;LI Chao(College of Environment,Hohai University,Nanjing 210098,China;Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes,Ministry of Education,Hohai University,Nanjing 210098,China;China MCC5 Group Co.,Ltd,Chengdu 610000,China)

机构地区：[1]河海大学环境学院,南京210098 [2]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,南京210098 [3]中国五冶集团有限公司,成都610000

出　　处：《环境工程》2023年第4期32-39,共8页Environmental Engineering

摘　　要：为获得高效去除活性艳蓝的方法,采用浸渍煅烧法制备了Fe/Mn-PAC催化剂,对催化剂的表面形态和结构进行表征,研究了不同因素对KN-R降解效果的影响,以及催化剂的重复利用性和稳定性。结果表明:Fe/Mn-PAC催化剂表面粗糙,具有较多的微孔结构,催化剂表面的金属氧化物为致密的地衣状结构,有利于提升催化剂的催化性能。在催化剂投加量为400 mg/L,初始pH为7.5,Fe/Mn进料比为1∶1及负载量为4%时,Fe/Mn-PAC表现出最佳的催化KN-R降解的反应活性,45 min内KN-R去除率高达90%以上;经过5次回收利用,去除率仍可达到84.7%。研究结果证明了Fe/Mn-PAC催化剂具有优异的催化能力和出色的结构稳定性,为实现印染废水中活性艳蓝KN-R的有效去除提供了技术支持。Typical dyestuffs,such as KN-R in printing and dyeing wastewater were difficult to be effectively removed by traditional biochemical treatment technology,due to their biological toxicity and chemical stability,which seriously polluted the water environment.To obtain an efficient KN-R removal approach,Fe/Mn-PAC catalyst was prepared by impregnation calcination.The surface morphology and structure of the catalysts were characterized,and the effects of different factors on the degradation of KN-R were also investigated.Meanwhile,the reusability and stability of the catalysts were studied.It was demonstrated that the Fe/Mn-PAC catalyst had a rough surface with more microporous structures,and the metal oxides on the catalyst surface were dense lichen-like structures,which were conducive to enhancing the catalytic performance.At a catalyst dosage of 400 mg/L,an initial pH of 7.5,an Fe/Mn feed ratio of 1∶1 and a loading amount of 4%,Fe/Mn-PAC showed the best catalytic activity for KN-R degradation,with over 90% of KN-R removed within 45 min.After five recycling cycles,the KN-R removal rate was still 84.7%.The above results demonstrated that the synthesized Fe/Mn-PAC catalyst possessed excellent catalytic capabilities and structural stability,and provided technical support to realize the effective removal of KN-R from printing and dyeing wastewater.

关 键 词：铁锰双金属氧化物 活性炭 活性艳蓝 降解性能 臭氧催化氧化 

分 类 号：X791[环境科学与工程—环境工程] TQ426[化学工程]