摘要
CoFe_(2)O_(4)在活化过一单硫酸氢盐(PMS)去除污染物方面表现出优异的催化活性,但其本身聚集性以及活性位点效率不足限制了其催化性能的发挥.本研究合成了CoFe_(2)O_(4)@MoS_(2),并将其用于活化PMS降解环丙沙星(CIP).结果表明,CoFe_(2)O_(4)@MoS_(2)/PMS体系在120 min内对CIP的降解效率达到80.53%,显著高于相同条件下MoS_(2)/PMS和CoFe_(2)O_(4)/PMS体系的降解效率.此外,本研究还系统考察了包括PMS投加量、CoFe_(2)O_(4)@MoS_(2)投加量、pH、温度以及天然水质组分(包括共存阴离子及天然有机物)在内的各种参数对CIP去除的影响.猝灭实验、电子顺磁共振(EPR)测试和电化学实验揭示了SO_(4)·-、·OH、O_(2)·-和^(1)O_(2)参与了CIP降解,其中SO_(4)·-和^(1)O_(2)是主要的活性物种.结合XPS分析,提出了CIP主要的降解机理.本研究为CoFe_(2)O_(4)@MoS_(2)活化过硫酸盐处理水环境中的有机污染物提供了理论数据和技术支持.
CoFe_(2)O_(4)demonstrated excellent performance in activating peroxymonosulfate(PMS)for pollutant degradation.However,its intrinsic agglomeration and insufficient active site efficiency limited its catalytic ability.In this study,CoFe_(2)O_(4)@MoS_(2)was synthesized to achieve efficient PMS activation for Ciprofloxacin(CIP)degradation.Results showed that CoFe_(2)O_(4)@MoS_(2)/PMS system reached 80.53%CIP degradation within 120 min,outperforming MoS_(2)/PMS and CoFe_(2)O_(4)/PMS systems under identical conditions.Key parameters influencing CIP removal including PMS dosage,CoFe_(2)O_(4)@MoS_(2)dosage,pH,temperature and natural water matrix components(such as coexisting anions and natural organic matter)were systematically investigated.Quenching experiments,electron paramagnetic resonance(EPR)testing,and electrochemical experiments revealed the involvement of SO_(4)•-,•OH,O_(2)•-and^(1)O_(2)in CIP degradation,with SO_(4)•-and^(1)O_(2)identified as main reactive species.Combined with the analysis of XPS,a plausible degradation mechanism was proposed.This study provides theoretical and technical support for the application of CoFe_(2)O_(4)@MoS_(2)in PMS activation for the treatment of organic pollutants in water environments.
作者
章慧娟
王杰
许娜
马梦杰
练建军
ZHANG Huijuan;WANG Jie;XU Na;MA Mengjie;LIAN Jianjun(School of Energy and Environment,Anhui University of Technology,Ma'anshan 243002;Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education,Anhui University of Technology,Ma'anshan 243032)
出处
《环境科学学报》
北大核心
2025年第8期121-133,共13页
Acta Scientiae Circumstantiae
基金
安徽省高校自然科学研究项目(No.KJ2021A0383)
国家自然科学基金面上项目(No.52370159)。
