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作者:

Fan Yan (Fan Yan.) | Liu Yanru (Liu Yanru.) | Hu Xiang (Hu Xiang.) | Sun Zhirong (Sun Zhirong.) (学者:孙治荣)

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摘要:

The metal organic framework derived materials (CoFe2O4@NC) activated peroxymonosulfate (PMS) to degrade Norfloxacin (NOR) owing to the characteristics of high surface area (109.658 m2 g-1) and abundant mesoporous structure. The characterization results demonstrated that the optimal ratio of bimetal and of bimetallic to organic ligands (M/O) had good crystal structure and stability (Fe/Co = 3:1, M/O = 2:1). Moreover, NOR (10 mg L-1) removal of 98.78% was achievable in 60 min with an optimum concentration of PMS (0.32 mM) and dosage of CoFe2O4@NC (0.1 g L-1). The radical quenching results suggested that SO4·-, ·OH and 1O2 functioned in the presence of the system certificated by XPS spectra. The presence of Cl- and CO32-/HCO3- promoted the catalyst reaction. The recoverability revealed high removal efficiency of NOR of 93.55% could still be maintained. Furthermore, four pathways of NOR degradation were proposed, including dehydroxylation, defluorination, quinolone group conversion and piperazine ring transformation, which were attributed to the synergy of reactive oxygen species. The above results highlight that the method is of great significance to the practical application of heterogeneous catalysts in aqueous solutions.

关键词:

Water treatment Peroxomonosulfate Metal organic framework Norfloxacin Oxidative degradation Radical

作者机构:

  • [ 1 ] [Fan Yan]College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
  • [ 2 ] [Liu Yanru]College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
  • [ 3 ] [Hu Xiang]College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China. Electronic address: huxiang@mail.buct.edu.cn
  • [ 4 ] [Sun Zhirong]College of Environmental & Energy Engineering, Beijing University of Technology, Beijing, 100124, PR China

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来源 :

Chemosphere

ISSN: 1879-1298

年份: 2021

卷: 275

页码: 130059

8 . 8 0 0

JCR@2022

ESI学科: ENVIRONMENT/ECOLOGY;

ESI高被引阀值:94

JCR分区:1

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SCOPUS被引频次: 34

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