Para acceder a los documentos con el texto completo, por favor, siga el siguiente enlace: http://hdl.handle.net/10256/7632

A mechanistic approach to methylene blue sorption on two vegetable wastes: Cork bark and grape stalks
Olivella Costa, Àngels; Fiol Santaló, Núria; Torre Yugueros, Florencio de la; Poch Garcia, Jordi; Villaescusa Gil, Isabel
Two vegetable wastes, cork bark and grape stalks, were investigated for the removal of methylene blue from aqueous solution. The effects of contact time, dye concentration, pH, and temperature on sorption were studied relative to adsorption on a commercially-activated carbon. The highest adsorption yield was obtained within the pH range 5 to 10 for grape stalks and 7 to 10 for cork bark. The sorption kinetics of dye onto activated carbon and grape stalks was very fast. Kinetics data were fitted to the pseudo-first and second order kinetic equations, and the values of the pseudo-second-order initial rate constants were found to be 1.69 mg g-1 min-1 for activated carbon, 2.24 mg g-1 min-1 for grape stalks, and 0.90 mg g-1 min-1 for cork bark. Langmuir maximum sorption capacities for activated carbon, grape stalks, and cork bark for methylene blue estimated by the Orthogonal Distance Regression method (ODR) were 157.5 mg g-1, 105.6 mg g-1, and 30.52 mg g-1, respectively. FTIR spectra indicated that carboxylic groups and lignin play a significant role in the sorption of methylene blue. Electrostatic forces, n-p interactions, cation-p, and p-p stacking interactions contribute to methylene blue sorption onto grape stalks and cork bark. Grape stalks can be considered an efficient biosorbent and as a viable alternative to activated carbon and ion-exchange resins for the removal of methylene blue
Carbó activat
Carbon, Activated
Absorció
Absorption
Tots els drets reservats
Artículo
info:eu-repo/semantics/publishedVersion
North Carolina State University
         

Mostrar el registro completo del ítem

Documentos relacionados

Otros documentos del mismo autor/a

Sen, Ali Umut; Olivella Costa, Àngels; Fiol Santaló, Núria; Miranda, Isabel; Villaescusa Gil, Isabel; Pereira, Helena
Olivella Costa, Àngels; Jové, Patricia; Sen, Ali Umut; Pereira, Helena; Villaescusa Gil, Isabel; Fiol Santaló, Núria
Martínez Martínez, María del Rosario; Miralles Esteban, Núria; Hidalgo, S; Fiol Santaló, Núria; Villaescusa Gil, Isabel; Poch Garcia, Jordi
Nurchi, Valeria Marina; Floris, Costantino; Pinna, Rosalba; Fiol Santaló, Núria; Villaescusa Gil, Isabel