Cargando…
Kinetic and thermodynamic studies of the degradation of methylene blue by photo-Fenton reaction
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 obtain...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8258640/ https://www.ncbi.nlm.nih.gov/pubmed/34307932 http://dx.doi.org/10.1016/j.heliyon.2021.e07427 |
_version_ | 1783718536113291264 |
---|---|
author | Raheb, Ibrahim Manlla, Mohammad Sameh |
author_facet | Raheb, Ibrahim Manlla, Mohammad Sameh |
author_sort | Raheb, Ibrahim |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-8258640 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-82586402021-07-23 Kinetic and thermodynamic studies of the degradation of methylene blue by photo-Fenton reaction Raheb, Ibrahim Manlla, Mohammad Sameh Heliyon Research Article 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. Elsevier 2021-06-28 /pmc/articles/PMC8258640/ /pubmed/34307932 http://dx.doi.org/10.1016/j.heliyon.2021.e07427 Text en © 2021 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Research Article Raheb, Ibrahim Manlla, Mohammad Sameh Kinetic and thermodynamic studies of the degradation of methylene blue by photo-Fenton reaction |
title | Kinetic and thermodynamic studies of the degradation of methylene blue by photo-Fenton reaction |
title_full | Kinetic and thermodynamic studies of the degradation of methylene blue by photo-Fenton reaction |
title_fullStr | Kinetic and thermodynamic studies of the degradation of methylene blue by photo-Fenton reaction |
title_full_unstemmed | Kinetic and thermodynamic studies of the degradation of methylene blue by photo-Fenton reaction |
title_short | Kinetic and thermodynamic studies of the degradation of methylene blue by photo-Fenton reaction |
title_sort | kinetic and thermodynamic studies of the degradation of methylene blue by photo-fenton reaction |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8258640/ https://www.ncbi.nlm.nih.gov/pubmed/34307932 http://dx.doi.org/10.1016/j.heliyon.2021.e07427 |
work_keys_str_mv | AT rahebibrahim kineticandthermodynamicstudiesofthedegradationofmethylenebluebyphotofentonreaction AT manllamohammadsameh kineticandthermodynamicstudiesofthedegradationofmethylenebluebyphotofentonreaction |