Equilibrium and thermodynamics of Chromium (VI) adsorption on inert biomasses of Dioscorea rotundata and Elaeis guineensis
Adsorption equilibrium on bioadsorbents was studied, and fitted to Langmuir, Freundlich and Dubinin-Radushkevich isothermal models, using yam peels (YP) and oil palm wastes (OPW) as bioadsorbents in the removal of hexavalent chromium present in aqueous solution, in a batch system, evaluating the eff...
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| Format: | Online |
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Universidad Pedagógica y Tecnológica de Colombia
2024
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| Online Access: | https://revistas.uptc.edu.co/index.php/ciencia_en_desarrollo/article/view/15494 |
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| author | Villabona-Ortíz, Angel Tejada-Tovar, Candelaria González-Delgado, Angel Darío Negrete-Palacio, Andrés López-Genes, José |
| author_facet | Villabona-Ortíz, Angel Tejada-Tovar, Candelaria González-Delgado, Angel Darío Negrete-Palacio, Andrés López-Genes, José |
| author_sort | Villabona-Ortíz, Angel |
| collection | OJS |
| description | Adsorption equilibrium on bioadsorbents was studied, and fitted to Langmuir, Freundlich and Dubinin-Radushkevich isothermal models, using yam peels (YP) and oil palm wastes (OPW) as bioadsorbents in the removal of hexavalent chromium present in aqueous solution, in a batch system, evaluating the effect of temperature, adsorbent dose and particle size on the process. Thermodynamic parameters were estimated by the Van't Hoff graphical method. It was found that the highest adsorption capacity was obtained at 0.03 g of adsorbent, 55 ºC and 0.5 mm of particle size. The equilibrium of adsorption on OPW is described by Langmuir and Freundlich isotherms, while that of YP by Dubinin-Radushkevich's model, indicating the adsorption is given by the ion exchange between the active centers and the metallic ion. The thermodynamic study determined that the elimination of YP is endothermic, irreversible, and not spontaneous and that for OPW it is exothermic, spontaneous at low temperatures, and irreversible. |
| format | Online |
| id | oai:oai.revistas.uptc.edu.co:article-15494 |
| institution | Revista Ciencia en Desarrollo |
| publishDate | 2024 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia |
| record_format | ojs |
| spelling | oai:oai.revistas.uptc.edu.co:article-154942024-05-11T07:17:16Z Equilibrium and thermodynamics of Chromium (VI) adsorption on inert biomasses of Dioscorea rotundata and Elaeis guineensis Villabona-Ortíz, Angel Tejada-Tovar, Candelaria González-Delgado, Angel Darío Negrete-Palacio, Andrés López-Genes, José Bioadsorption Langmuir Freundlich Dubinin-Radushkevich Adsorption equilibrium on bioadsorbents was studied, and fitted to Langmuir, Freundlich and Dubinin-Radushkevich isothermal models, using yam peels (YP) and oil palm wastes (OPW) as bioadsorbents in the removal of hexavalent chromium present in aqueous solution, in a batch system, evaluating the effect of temperature, adsorbent dose and particle size on the process. Thermodynamic parameters were estimated by the Van't Hoff graphical method. It was found that the highest adsorption capacity was obtained at 0.03 g of adsorbent, 55 ºC and 0.5 mm of particle size. The equilibrium of adsorption on OPW is described by Langmuir and Freundlich isotherms, while that of YP by Dubinin-Radushkevich's model, indicating the adsorption is given by the ion exchange between the active centers and the metallic ion. The thermodynamic study determined that the elimination of YP is endothermic, irreversible, and not spontaneous and that for OPW it is exothermic, spontaneous at low temperatures, and irreversible. El equilibrio de adsorción en bioadsorbentes fue estudiado y ajustado a los modelos de isoterma de Langmuir, Freundlich y Dubinin-Radushkevich, usando cáscaras de ñame (YP) y residuos de palma de acete (OPW) como bioadsorbentes en la remoción de cromo hexavalente presente en soluciones acuosas en sistema por lotes, evaluando el efecto de la temperatura, dosis de adsorbente y tamaño de partícula sobre el proceso. Los parámetros termodinámicos fueron estimados mediante el método gráfico de Van’t Hoff. Se encontró que la máxima capacidad de adsorción se obtuvo al usar 0.03 g de adsorbente, 55 °C y 0.5 mm de tamaño de partícula. El equilibrio de adsorción sobre OPW fue descrito por las isotermas de Langmuir y Freundlich, mientras que sobre YP por el modelo de Dubinin-Radushkevich, indicando que la adsorción se da por intercambio iónico entre los centros activos y el ion metálico. El estudio termodinámico estimó que la eliminación sobre YP es endotérmico, irreversible y no espontáneo, y el proceso sobre OPW es exotérmico, espontáneo a baja temperatura e irreversible. Universidad Pedagógica y Tecnológica de Colombia 2024-04-09 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://revistas.uptc.edu.co/index.php/ciencia_en_desarrollo/article/view/15494 10.19053/01217488.v15.n1.2024.15494 Ciencia En Desarrollo; Vol. 15 No. 1 (2024): Vol 15, Núm.1 (2024): Enero-Junio Ciencia en Desarrollo; Vol. 15 Núm. 1 (2024): Vol 15, Núm.1 (2024): Enero-Junio 2462-7658 0121-7488 |
| spellingShingle | Bioadsorption Langmuir Freundlich Dubinin-Radushkevich Villabona-Ortíz, Angel Tejada-Tovar, Candelaria González-Delgado, Angel Darío Negrete-Palacio, Andrés López-Genes, José Equilibrium and thermodynamics of Chromium (VI) adsorption on inert biomasses of Dioscorea rotundata and Elaeis guineensis |
| title | Equilibrium and thermodynamics of Chromium (VI) adsorption on inert biomasses of Dioscorea rotundata and Elaeis guineensis |
| title_full | Equilibrium and thermodynamics of Chromium (VI) adsorption on inert biomasses of Dioscorea rotundata and Elaeis guineensis |
| title_fullStr | Equilibrium and thermodynamics of Chromium (VI) adsorption on inert biomasses of Dioscorea rotundata and Elaeis guineensis |
| title_full_unstemmed | Equilibrium and thermodynamics of Chromium (VI) adsorption on inert biomasses of Dioscorea rotundata and Elaeis guineensis |
| title_short | Equilibrium and thermodynamics of Chromium (VI) adsorption on inert biomasses of Dioscorea rotundata and Elaeis guineensis |
| title_sort | equilibrium and thermodynamics of chromium vi adsorption on inert biomasses of dioscorea rotundata and elaeis guineensis |
| topic | Bioadsorption Langmuir Freundlich Dubinin-Radushkevich |
| topic_facet | Bioadsorption Langmuir Freundlich Dubinin-Radushkevich |
| url | https://revistas.uptc.edu.co/index.php/ciencia_en_desarrollo/article/view/15494 |
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