Kinetic and thermodynamic studies of the degradation of methylene blue by photo-Fenton reaction.
Degradation
Kinetics
Methylene blue
Photo-fenton reaction
Thermodynamic
Journal
Heliyon
ISSN: 2405-8440
Titre abrégé: Heliyon
Pays: England
ID NLM: 101672560
Informations de publication
Date de publication:
Jun 2021
Jun 2021
Historique:
received:
08
04
2021
revised:
19
05
2021
accepted:
24
06
2021
entrez:
26
7
2021
pubmed:
27
7
2021
medline:
27
7
2021
Statut:
epublish
Résumé
Syrian natural magnetite has been utilized for the removal of methylene blue from aqueous solutions by photo-Fenton reaction. Experiments were carried out to evaluate the kinetic and thermodynamic parameters. Pseudo-first order, pseudo-second-order models were used to analyze the kinetic data obtained at different initial MB concentrations and temperatures. The photo-Fenton degradation process of MB is better described by the pseudo-first-order model. The activation energy Ea = 16.89 and 18.02 kJ/mol for MB degradation at concentrations 40 and 80 mg/l respectively, and that suggesting the degradation reaction proceeded with a low energy barrier, the values obtained (ΔG∗, ΔS∗, and ΔH∗) indicate that the process is endothermic and spontaneous.
Identifiants
pubmed: 34307932
doi: 10.1016/j.heliyon.2021.e07427
pii: S2405-8440(21)01530-9
pmc: PMC8258640
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e07427Informations de copyright
© 2021 The Author(s).
Déclaration de conflit d'intérêts
The authors declare no conflict of interest.
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