| 引用本文: | 许光益,隋铭皓,袁博杰,芦洪涛,袁蓁,秦捷,王菁宇.纳米CuFe2O4活化过一硫酸盐降解诺氟沙星性能[J].哈尔滨工业大学学报,2018,50(2):46.DOI:10.11918/j.issn.0367-6234.201710049 |
| XU Guangyi,SUI Minghao,YUAN Bojie,LU Hongtao,YUAN Zhen,QIN Jie,WANG Jingyu.Degradation of Norfloxacin in aqueous solution by peroxymonosulfate activated with CuFe2O4 nanoparticles[J].Journal of Harbin Institute of Technology,2018,50(2):46.DOI:10.11918/j.issn.0367-6234.201710049 |
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| 摘要: |
| 为研究使用过一硫酸盐(PMS)的高级氧化技术去除水体中微量有机污染物的高效可行方法，通过柠檬酸辅助溶胶-凝胶法制备纳米CuFe2O4材料，以其为非均相催化剂，探究CuFe2O4/PMS体系对诺氟沙星(NFX)的降解性能.采用X射线衍射仪、电子透射显微镜、BET手段对材料进行表征，考察煅烧温度对纳米CuFe2O4结构及催化性能的影响，并试验纳米CuFe2O4的重复使用性和稳定性.探讨纳米CuFe2O4投加量、PMS浓度、溶液初始pH对CuFe2O4/PMS体系降解NFX性能的影响，并探究该体系的氧化活性物种及降解机理.结果表明：制备纳米CuFe2O4的最佳煅烧温度为400 ℃，该温度下纳米CuFe2O4晶型较好，比表面积较大，且表现出较高的催化活性; 在纳米CuFe2O4/PMS体系中，控制NFX初始质量浓度为5 mg/L，最适宜的反应条件为：纳米CuFe2O4投加量为0.1 g/L、PMS浓度为0.5 mmol/L、初始溶液pH为9.5，该条件下反应30 min后NFX的去除率高达99%;纳米CuFe2O4能有效活化PMS生成·OH和SO4-·，SO4-·是实现NFX快速降解的主要活性物种.
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| 关键词: CuFe2O4 过一硫酸盐 诺氟沙星 煅烧温度 硫酸根自由基 |
| DOI：10.11918/j.issn.0367-6234.201710049 |
| 分类号:X703 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(2,1)； 十二五国家重大水专项(2014ZX07405-003) |
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| Degradation of Norfloxacin in aqueous solution by peroxymonosulfate activated with CuFe2O4 nanoparticles |
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XU Guangyi,SUI Minghao,YUAN Bojie,LU Hongtao,YUAN Zhen,QIN Jie,WANG Jingyu
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(State Key Laboratory of Pollution Control and Resource Reuse(Tongji University), Shanghai 200092, China)
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| Abstract: |
| To study the efficient method for removal of the trace organic pollutants in water by peroxymonosulfate (PMS) based advanced oxidation processes, CuFe2O4nanoparticles were prepared by sol-gel method and used as heterogeneous catalyst in the CuFe2O4/PMS system for the degradation of norfloxacin(NFX). The CuFe2O4 nanoparticles were characterized by X-ray diffraction (XRD), Transmission Electron Microscopy (TEM) and Brunner-Emmet-Teller (BET). Several significant factors affecting the catalytic properties in the CuFe2O4/PMS system such as calcination temperature, CuFe2O4 dosage, PMS concentration and initial pH were investigated, and the reusability and stability of CuFe2O4nanoparticles were tested as well. Besides, the degradation mechanism of NFX in the CuFe2O4/PMS heterogeneous system was studied. The results showed that the best calcination temperature was 400 ℃, and in that temperature, better crystalline, larger surface area, higher catalytic activity could be obtained. The optimum of reaction conditions for the removal of NFX in CuFe2O4/PMS system was 0.1 g/L CuFe2O4, 0.5 mmol/L PMS and initial pH 9.5, under such conditions, NFX removal rate can reach 99% in 30 mins. CuFe2O4 could effectively activate PMS to generate·OH and SO4-·, and SO4-·was the main active species.
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| Key words: CuFe2O4 peroxymonosulfate norfloxacin calcination temperature sulfate radical |
