Using red mud to prepare the iron-bearing catalyst for the efficient degradation of phenol in the Fenton-like process.
In: Arabian Journal of Chemistry, Jg. 17 (2024-06-01), Heft 6, S. N.PAG
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Zugriff:
[Display omitted] • An iron-bearing catalyst was prepared with red mud by HCl dissolution, ascorbic acid reducing and precipitation of filter liquor. • Production of ferrous polymetallic oxides in FRM/2%A played a crucial role during phenol degradation. • Degradation pathway was phenol → catechol → benzoquinone → maleic acid → small molecular organic acids → CO 2 and H 2 O. • The FRM/2%A/H 2 O 2 system had good environmental applicability. Phenol pollution is widely environmental and health problems that require new insights and urgent attention. A iron-bearing catalyst (FRM/2%A) was prepared with red mud by HCl dissolution, ascorbic acid reducing and precipitation of filter liquor, and activated H 2 O 2 to degrade the phenol in synthetic wastewater. Results show that FRM/2%A had the highest degradation efficiency (99.3 %) in the reaction time of 5 min among investigative samples, due to the production of ferrous polymetallic oxides on the catalyst and the formation of mesoscopic particles and microcellular structures. The optimal conditions were 1 g/L of catalyst dosage, 5 mM of H 2 O 2 concentration, 3–6 of initial pH and 100 mg/L of initial concentration of phenol in the FRM/2%A/H 2 O 2 system. The degradation data fit into the pseudo-first-order kinetics model and the reaction rate constant (k) of FRM/2%A was 0.865 min −1 . The removal efficiency (77 %) of COD below the value (99.3 %) of phenol degradation implied the intermediates generating during the phenol degradation. The possible degradation pathway was proposed as phenol → catechol → benzoquinone → muconic acid → small molecular organic acids → CO 2 and H 2 O. The findings suggested a new way for the synthesis of the efficient catalyst with RM and optimal operating strategies for the treatment of phenol wastewater. [ABSTRACT FROM AUTHOR]
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Titel: |
Using red mud to prepare the iron-bearing catalyst for the efficient degradation of phenol in the Fenton-like process.
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Autor/in / Beteiligte Person: | Chen, Hongliang ; Long, Qian ; Zhang, Yutao ; Yang, Haihong ; Shu, Jiancheng |
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Zeitschrift: | Arabian Journal of Chemistry, Jg. 17 (2024-06-01), Heft 6, S. N.PAG |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 1878-5352 (print) |
DOI: | 10.1016/j.arabjc.2024.105797 |
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