Kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blue
The need for light intensity has made dye degradation very costly for industry. In this work, Fenton reagent was used for the efficient degradation of an aqueous solution of dye without the need for a light source. The influences of the pH of the media, the initial concentrations of Fe2+, H2O2, and...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-08-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844020312986 |
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| author | Abdur-Rahim A. Giwa Isah A. Bello Abdullahi B. Olabintan Olugbenga S. Bello Tawfik A. Saleh |
| author_facet | Abdur-Rahim A. Giwa Isah A. Bello Abdullahi B. Olabintan Olugbenga S. Bello Tawfik A. Saleh |
| author_sort | Abdur-Rahim A. Giwa |
| collection | DOAJ |
| description | The need for light intensity has made dye degradation very costly for industry. In this work, Fenton reagent was used for the efficient degradation of an aqueous solution of dye without the need for a light source. The influences of the pH of the media, the initial concentrations of Fe2+, H2O2, and methylene blue (MB) dye; in addition to temperature on the oxidation of MB dye were studied. The optimum amounts of the Fenton reagent were 4mM of Fe2+ and 70mM of H2O2 at 20 mg/L of dye. The optimum ratio of 0.05 of Fe2+/H2O2 was found to give the best result for the decolorization of dye. The Fenton process was effective at pH 3 with a maximum dye decolorization efficiency of 98.8% within 30 min of reaction, corresponding to a COD removal of 85%. The decolorization process was thermodynamically feasible, spontaneous, and endothermic. The activation energy (Ea) was 33.6 kJ/mol suggesting that the degradation reaction proceeded with a low energy barrier. |
| first_indexed | 2024-12-13T15:39:20Z |
| format | Article |
| id | doaj.art-fdc8134353a14117a3cd7936ad4d44ad |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-12-13T15:39:20Z |
| publishDate | 2020-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-fdc8134353a14117a3cd7936ad4d44ad2022-12-21T23:39:53ZengElsevierHeliyon2405-84402020-08-0168e04454Kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blueAbdur-Rahim A. Giwa0Isah A. Bello1Abdullahi B. Olabintan2Olugbenga S. Bello3Tawfik A. Saleh4Department of Pure and Applied Chemistry, LadokeAkintola University of Technology, P. M. B., 4000, Ogbomoso, Oyo State, NigeriaDepartment of Pure and Applied Chemistry, LadokeAkintola University of Technology, P. M. B., 4000, Ogbomoso, Oyo State, NigeriaChemistry Department, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi ArabiaDepartment of Pure and Applied Chemistry, LadokeAkintola University of Technology, P. M. B., 4000, Ogbomoso, Oyo State, Nigeria; Department of Physical Sciences, Industrial Chemistry Programme, Landmark University, Omu-Aran, NigeriaChemistry Department, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia; Corresponding author.The need for light intensity has made dye degradation very costly for industry. In this work, Fenton reagent was used for the efficient degradation of an aqueous solution of dye without the need for a light source. The influences of the pH of the media, the initial concentrations of Fe2+, H2O2, and methylene blue (MB) dye; in addition to temperature on the oxidation of MB dye were studied. The optimum amounts of the Fenton reagent were 4mM of Fe2+ and 70mM of H2O2 at 20 mg/L of dye. The optimum ratio of 0.05 of Fe2+/H2O2 was found to give the best result for the decolorization of dye. The Fenton process was effective at pH 3 with a maximum dye decolorization efficiency of 98.8% within 30 min of reaction, corresponding to a COD removal of 85%. The decolorization process was thermodynamically feasible, spontaneous, and endothermic. The activation energy (Ea) was 33.6 kJ/mol suggesting that the degradation reaction proceeded with a low energy barrier.http://www.sciencedirect.com/science/article/pii/S2405844020312986Physical chemistryInteractionsFenton's reagentDyeThermodynamicKinetics |
| spellingShingle | Abdur-Rahim A. Giwa Isah A. Bello Abdullahi B. Olabintan Olugbenga S. Bello Tawfik A. Saleh Kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blue Heliyon Physical chemistry Interactions Fenton's reagent Dye Thermodynamic Kinetics |
| title | Kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blue |
| title_full | Kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blue |
| title_fullStr | Kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blue |
| title_full_unstemmed | Kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blue |
| title_short | Kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blue |
| title_sort | kinetic and thermodynamic studies of fenton oxidative decolorization of methylene blue |
| topic | Physical chemistry Interactions Fenton's reagent Dye Thermodynamic Kinetics |
| url | http://www.sciencedirect.com/science/article/pii/S2405844020312986 |
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