Catalytic potential of CuFe2O4/GO for activation of peroxymonosulfate in metronidazole degradation: study of mechanisms
| Autor: | Mitra Gholami, Mahdi Farzadkia, Roghayeh Noroozi, Ahmad Jonidi Jafari |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Degradation kinetics Health Toxicology and Mutagenesis Radical Oxide 02 engineering and technology 010501 environmental sciences 01 natural sciences Applied Microbiology and Biotechnology Catalysis law.invention chemistry.chemical_compound 020401 chemical engineering law 0204 chemical engineering Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Nanocomposite Kinetic model Graphene Public Health Environmental and Occupational Health Pollution chemistry Leaching (metallurgy) Nuclear chemistry |
| Zdroj: | Journal of Environmental Health Science and Engineering. 18:947-960 |
| ISSN: | 2052-336X |
| Popis: | Application of magnetite nanoparticles (CuFe2O4/GO) were anchored on graphene oxide (GO), as a Heterogeneous nanocomposite for activating of peroxymonosulfate (PMS) into Metronidazole (MNZ) destruction. The effect of solution pH, reaction time, effectiveness of water matrix components and trapping factors, different catalyst concentrations, PMS and contaminants were evaluated as operating factors on the efficiency of MNZ degradation. Also, mineralization, stability, reactivity and Recycling tests of the catalyst, and the degradation kinetics were performed. MNZ degradation and mineralization were obtained under optimal conditions (0.2 g/L catalyst, pH = 5, 30 mg/L MNZ and 2 mM PMS), 100% and 41.02%, respectively over 120 min. Leaching of Fe and Cu was found NO3− > Cl− > SO42−. The experimental data were very good agreement with pseudo-first-order kinetic model, and during quenching tests SO4•- radicals played a dominant role in the degradation process of MNZ. As a result, the CuFe2O4/GO/PMS system can be described as a promising activation of PMS in MNZ degradation, due to its high stability, reusability and good catalyst reactivity, and the production of reactive species simultaneously. |
| Databáze: | OpenAIRE |
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