A GRASP-Tabu Heuristic Approach to Territory Design for Pickup and Delivery Operations for Large-Scale Instances

González Ramírez, Rosa G. y Smith, Neale R. y Askin, Ronald G. y Camacho Vallejo, José-Fernando y González Velarde, Jose Luis (2017) A GRASP-Tabu Heuristic Approach to Territory Design for Pickup and Delivery Operations for Large-Scale Instances. Mathematical Problems in Engineering, 2017. pp. 1-13. ISSN 1024-123X

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URL o página oficial: http://doi.org/10.1155/2017/4708135

Resumen

In this work, the biosorption mechanism of the cationic dye Methylene Blue (MB) on natural White Pine sawdust (NS) (Pinus durangensis) was investigated. Likewise, the surface charge distribution of NS was determined, and its point of zero charge was found to be 4.3. Besides, the capacity of the NS for adsorbing MB was increased 1.7, 2.0 and 4.6 times when the pH was raised from 3 to 4.25, 3 to 7 and 3 to 10, respectively. This behavior was attributed to the electrostatic attraction between the negatively charged surface of NS and the cationic species MBþ. The adsorption capacity increased with increased temperature because the adsorption was an endothermic process. The adsorption capacity was drastically reduced by increasing the ionic strength of the solution corroborating with the fact that the electrostatic attractions played a crucial role in the adsorption of MB on NS. It was also shown that the MB was chemisorbed because the adsorption was not reversible. The predominant adsorption mechanisms were the electrostatic attraction and chemisorption and not ion exchange. © 2016 Chinese Institute of Environmental Engineering, Taiwan. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/).

Tipo de elemento: Article
Palabras claves no controlados: Biosorption, Chemisorption, Electrostatic attraction, Mechanism, Methylene Blue, White pine, Wood sawdust
Materias: T Tecnología > TJ Ingeniería Mecánica
Divisiones: Ingeniería Mecánica y Eléctrica
Usuario depositante: Lic. Josimar Pulido
Creadores:
CreadorEmailORCID
González Ramírez, Rosa G.NO ESPECIFICADONO ESPECIFICADO
Smith, Neale R.NO ESPECIFICADONO ESPECIFICADO
Askin, Ronald G.NO ESPECIFICADONO ESPECIFICADO
Camacho Vallejo, José-FernandoNO ESPECIFICADONO ESPECIFICADO
González Velarde, Jose LuisNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 26 Mayo 2020 16:35
Última modificación: 26 Mayo 2020 16:35
URI: http://eprints.uanl.mx/id/eprint/14610

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