Kinetic and Thermodynamic Studies on the Adsorption of Reactive Red 239 by Carra Sawdust Treated with Formaldehyde
In this study, carra sawdust pre-treated with formaldehyde was used to adsorb reactive red 239 (RR239). The effects of several experimental conditions, including the concentration of dye, sorbent dosage, temperature, ionic strength, stirring speed and solution pH, on the kinetics of the adsorption p...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2012-12-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.30.10.881 |
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| author | Nedher Sanchez Tânia M. Benedetti Mario Vazquez Susana I. Córdoba de Torresi Roberto M. Torresi |
| author_facet | Nedher Sanchez Tânia M. Benedetti Mario Vazquez Susana I. Córdoba de Torresi Roberto M. Torresi |
| author_sort | Nedher Sanchez |
| collection | DOAJ |
| description | In this study, carra sawdust pre-treated with formaldehyde was used to adsorb reactive red 239 (RR239). The effects of several experimental conditions, including the concentration of dye, sorbent dosage, temperature, ionic strength, stirring speed and solution pH, on the kinetics of the adsorption process have been studied, and the experimental data were fitted to pseudo-second-order model. A study of the intra-particle diffusion model indicates that the mechanism of dye adsorption using carra sawdust is rather complex and is most likely a combination of external mass transfer and intra-particle diffusion. The experimental data obtained at equilibrium were analyzed using the Langmuir and Freundlich isotherm models, and the results indicated that at this concentration range, both models can be applied for obtaining the equilibrium parameters. The maximum dye uptake obtained at 298 K was found to be 15.1 mg g −1 . In contrast to the usual systems, the reactive dye studied in the present work is strongly attached to the sawdust even after several washes with water, allowing it to be discarded as a solid waste. |
| format | Article |
| id | doaj-art-f634378a2be94f229655fdde7672bbb0 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2012-12-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-f634378a2be94f229655fdde7672bbb02025-01-03T01:23:08ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382012-12-013010.1260/0263-6174.30.10.881Kinetic and Thermodynamic Studies on the Adsorption of Reactive Red 239 by Carra Sawdust Treated with FormaldehydeNedher Sanchez0Tânia M. Benedetti1Mario Vazquez2Susana I. Córdoba de Torresi3Roberto M. Torresi4 Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, A.A.1226, Medellín, Colombia Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo (USP), CP 26077, 05513-970, São Paulo-SP, Brazil Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, A.A.1226, Medellín, Colombia Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo (USP), CP 26077, 05513-970, São Paulo-SP, Brazil Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo (USP), CP 26077, 05513-970, São Paulo-SP, BrazilIn this study, carra sawdust pre-treated with formaldehyde was used to adsorb reactive red 239 (RR239). The effects of several experimental conditions, including the concentration of dye, sorbent dosage, temperature, ionic strength, stirring speed and solution pH, on the kinetics of the adsorption process have been studied, and the experimental data were fitted to pseudo-second-order model. A study of the intra-particle diffusion model indicates that the mechanism of dye adsorption using carra sawdust is rather complex and is most likely a combination of external mass transfer and intra-particle diffusion. The experimental data obtained at equilibrium were analyzed using the Langmuir and Freundlich isotherm models, and the results indicated that at this concentration range, both models can be applied for obtaining the equilibrium parameters. The maximum dye uptake obtained at 298 K was found to be 15.1 mg g −1 . In contrast to the usual systems, the reactive dye studied in the present work is strongly attached to the sawdust even after several washes with water, allowing it to be discarded as a solid waste.https://doi.org/10.1260/0263-6174.30.10.881 |
| spellingShingle | Nedher Sanchez Tânia M. Benedetti Mario Vazquez Susana I. Córdoba de Torresi Roberto M. Torresi Kinetic and Thermodynamic Studies on the Adsorption of Reactive Red 239 by Carra Sawdust Treated with Formaldehyde Adsorption Science & Technology |
| title | Kinetic and Thermodynamic Studies on the Adsorption of Reactive Red 239 by Carra Sawdust Treated with Formaldehyde |
| title_full | Kinetic and Thermodynamic Studies on the Adsorption of Reactive Red 239 by Carra Sawdust Treated with Formaldehyde |
| title_fullStr | Kinetic and Thermodynamic Studies on the Adsorption of Reactive Red 239 by Carra Sawdust Treated with Formaldehyde |
| title_full_unstemmed | Kinetic and Thermodynamic Studies on the Adsorption of Reactive Red 239 by Carra Sawdust Treated with Formaldehyde |
| title_short | Kinetic and Thermodynamic Studies on the Adsorption of Reactive Red 239 by Carra Sawdust Treated with Formaldehyde |
| title_sort | kinetic and thermodynamic studies on the adsorption of reactive red 239 by carra sawdust treated with formaldehyde |
| url | https://doi.org/10.1260/0263-6174.30.10.881 |
| work_keys_str_mv | AT nedhersanchez kineticandthermodynamicstudiesontheadsorptionofreactivered239bycarrasawdusttreatedwithformaldehyde AT taniambenedetti kineticandthermodynamicstudiesontheadsorptionofreactivered239bycarrasawdusttreatedwithformaldehyde AT mariovazquez kineticandthermodynamicstudiesontheadsorptionofreactivered239bycarrasawdusttreatedwithformaldehyde AT susanaicordobadetorresi kineticandthermodynamicstudiesontheadsorptionofreactivered239bycarrasawdusttreatedwithformaldehyde AT robertomtorresi kineticandthermodynamicstudiesontheadsorptionofreactivered239bycarrasawdusttreatedwithformaldehyde |