摘要
针对抗生素磺胺嘧啶(SDZ)导致水体污染的问题,采用水热法制备以石墨烯(rGO)为基底的三维层状兼光催化与过硫酸盐活化功能的Co_(3)Mn-LDHs/rGO双效催化剂,构建可见光/过硫酸盐耦合降解体系(Vis-PMS),降解水中的SDZ.实验结果表明:Co_(3)Mn-LDHs成功负载在rGO上,且Co_(3)Mn-LDHs的依附阻止了rGO片的堆叠;Co_(3)Mn-LDHs/rGO质量浓度为20mg/L,过硫酸盐(PMS)质量浓度为200mg/L,初始pH=7为可见光耦合非均相活化PMS体系降解SDZ的最佳条件,经60min反应后,SDZ的去除率达87.58%;在10次循环实验后,Co_(3)Mn-LDHs/rGO仍对SDZ有较高的去除率,可重复利用率较好;该体系中起主要作用的自由基为硫酸根自由基(SO^(4)^(·-))、羟基自由基(∙OH)和单线态氧(^(1)O_(2)).
Aiming at the problem of water pollution caused by the antibiotic sulfadiazine(SDZ),a three-dimensional layered Co_(3)Mn-LDHs/rGO dual-action catalyst with both photocatalysis and persulfate activation functions based on graphene(rGO)was prepared by a hydrothermal method,and a visible light/persulfate coupled degradation system(Vis-PMS)was constructed to degrade SDZ in water.The experimental results show that Co_(3)Mn-LDHs are successfully loaded on rGO and the attachment of Co_(3)Mn-LDHs prevents the stacking of rGO sheets.The optimal conditions for the degradation of SDZ in the visible-light-coupled non-homogeneous-phase-activated PMS system are Co_(3)Mn-LDHs/rGO mass concentration of 20 mg/L,PMS mass concentration of 200 mg/L,and an initial pH=7,and the removal rate of SDZ reaches 87.58%after 60 min of reaction.Co_(3)Mn-LDHs/rGO still has a high removal rate for SDZ with good reusability after 10 cycle tests.The free radicals that play a major role in this system are sulfate radicals(SO^(4)^(·-)),hydroxyl radicals(∙OH),and singlet-linear oxygen(^(1)O_(2)).
作者
赵雪松
亓丽丽
武韬
单薇
任新
周天瑜
ZHAO Xuesong;QI Lili;WU Tao;SHAN Wei;REN Xin;ZHOU Tianyu(College of Engineering,Jilin Normal University,Siping 136000,Jilin Province,China;Shanghai Institute of Percision Measurement and Test,Shanghai 201109,China;Jilin Province Product Quality Supervision and Inspection Institute,Changchun 130103,China)
出处
《吉林大学学报（理学版）》
CAS
北大核心
2023年第6期1501-1510,共10页
Journal of Jilin University:Science Edition
基金
国家自然科学基金(批准号:52270038)
吉林省科技厅计划发展项目(批准号:20220101073JC)
吉林省人力资源与社会保障厅项目(批准号:2023337)。
作者简介
第一作者:赵雪松(1983-),女,汉族,博士,副教授,从事高级氧化技术去除水中新型污染物的研究,E-mail:zhaoxuesong008@163.com;通信作者:任新(1984-),男,汉族,博士,副教授,从事水污染处理的研究,E-mail:renxin_hit@126.com;通信作者:周天瑜(1989-),女,汉族,博士,副教授,从事靶向识别与光催化处理废水的研究,E-mail:tianyuzhou@jlnu.edu.cn.
