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Activation of Persulfate by Irradiated Magnetite: Implications for the Degradation of Phenol under Heterogeneous Photo-Fenton-Like Conditions

Articolo
Data di Pubblicazione:
2015
Abstract:
We show that phenol can be effectively degraded by magnetite in the presence of persulfate (S2O82−) under UVA irradiation. The process involves the radical SO4−•, formed from S2O82− in the presence of FeII. Although magnetite naturally contains FeII, the air-exposed oxide surface is fully oxidized to FeIII and irradiation is required to produce FeII. The magnetite + S2O8 2− system was superiorto the corresponding magnetite + H2O2 one in the presence of radical scavengers and in a natural water matrix, but it induced phenol mineralization in ultrapure water to a lesser extent. The leaching of Fe from the oxide surface was very limited, and much below the wastewater discharge limits. The reasonable performance of the magnetite/persulfate system in a natural water matrix and the low levels of dissolved Fe are potentially important for the removal of organic contaminants in wastewater. color spaces.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
Biodegradation; Contamination; Irradiation; Phenols; Degradation of phenols; Heterogeneous photo-Fenton; Natural-water matrices; Organic contaminant; Radical scavengers; Ultra-pure water; Uva irradiations; Wastewater discharge
Elenco autori:
P. Avetta; A. Pensato; M. Minella; M. Malandrino; V. Maurino; C. Minero; K. Hanna; D. Vione
Autori di Ateneo:
MALANDRINO Mery
MAURINO Valter
MINELLA Marco
MINERO Claudio
VIONE Davide Vittorio
Link alla scheda completa:
https://iris.unito.it/handle/2318/153535
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/153535/96297/ES&T2015_magnetite_my.pdf
Pubblicato in:
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Journal
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URL

http://pubs.acs.org/doi/abs/10.1021/es503741d
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