工业水处理 ›› 2025, Vol. 45 ›› Issue (8): 43-52. doi: 10.19965/j.cnki.iwt.2024-0612

• 试验研究 • 上一篇    下一篇

羟胺/磁性铜铁氧体活化过硫酸盐高效降解磺胺甲 唑

邹磊1(), 向威1,2(), 王怡帆1,2, 周涛2, 马凤娟2, 刘向荣1   

  1. 1. 中国市政工程中南设计研究总院有限公司科研院,湖北 武汉 430014
    2. 华中科技大学环境科学与工程学院,湖北 武汉 430074
  • 收稿日期:2024-10-12 出版日期:2025-08-20 发布日期:2025-09-25
  • 通讯作者: 向威
  • 作者简介:

    邹磊(1980— ),正高级工程师,E-mail:

  • 基金资助:
    国家自然科学基金项目(22006045); 中国市政工程中南设计研究总院有限公司院内科研项目(KY-N-S-2023-002)

Efficient degradation of sulfamethoxazole via the activation of persulfate by hydroxylamine/magnetic copper ferrite

Lei ZOU1(), Wei XIANG1,2(), Yifan WANG1,2, Tao ZHOU2, Fengjuan MA2, Xiangrong LIU1   

  1. 1. Research Institute, Central & Southern China Municipal Engineering Design and Research Institute Co. , Ltd. , Wuhan 430014, China
    2. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2024-10-12 Online:2025-08-20 Published:2025-09-25
  • Contact: Wei XIANG

摘要:

通过溶胶-凝胶燃烧法制备了以CuFe2O4为主要成分、具有(311)晶面的磁性铜铁氧体材料(CFO),在羟胺(HA)辅助下该催化材料可高效活化过硫酸盐(PDS)降解磺胺甲 唑(SMX)。实验结果表明,pH在5~9的范围内,SMX在CFO/PDS/HA体系中60 min的降解率均可达80%以上,HA、PDS和CFO在适当的投加浓度范围内均与SMX降解速率呈现正相关性。基于阿伦尼乌斯方程的温度-降解速率拟合曲线表明,该催化降解反应受限于化学反应速率而非界面传质。通过进一步的铜铁位点角色分析,推测HA促进了CFO表面的Cu(Ⅰ)/Cu(Ⅱ)和Fe(Ⅱ)/Fe(Ⅲ)循环,从而支持了PDS的非均相高效催化分解;自由基鉴定和猝灭实验则表明,1O2和·OH为SMX的去除做出了主要贡献。在常见阴离子共存下CFO/PDS/HA体系也具有较好的表现,其中NO3 -与SO4 2-对CFO/PDS/HA体系中SMX降解的影响较小,Cl-、Br-和HCO3 -在中低浓度下可显著加速SMX降解。

关键词: 铜铁氧体, 过硫酸盐, 催化氧化, 磺胺甲唑

Abstract:

Magnetic copper ferrite(CFO) mainly consisting of CuFe2O4 and with(311) crystal face was synthesized through sol-gel combustion method. It could efficiently activate persulfate(PDS) to degrade sulfamethoxazole(SMX) at the presence of hydroxylamine(HA). Results showed that the removal rate of SMX could be above 80% in the CFO/PDS/HA system with pH from 5-9. At rational concentration scope, the dosages of HA, PDS and CFO were positively related to the removal efficiency of SMX, respectively. According to the linearly fitting of temperature versus degradation rate based on Arrhenius equation, it could be confirmed that the catalytic reaction for SMX degradation was limited by chemical reaction rate instead of interfacial mass transfer. Further analysis for the role of copper and iron site indicated that HA promoted the Cu(Ⅰ)/Cu(Ⅱ) and Fe(Ⅱ)/Fe(Ⅲ) cycle on CFO surface, which supported the heterogeneously effective catalysis of PDS. The identification of radicals and quenching experiments indicated that the main contribution to the removal of SMX was made by 1O2 and ·OH. Even with the coexistence of common anions, the CFO/PDS/HA system also exhibited good performance. Negligible effect was found with NO3 - or SO4 2- while Cl- and Br- at mediate concentration would significantly accelerate the degradation of SMX.

Key words: copper ferrite, persulfate, catalytic oxidation, sulfamethoxazole

中图分类号: