Adsorption performance of food red 17 dye using an eco-friendly material based on luffa cylindrica and chitosan

Luffa cylindrica (LC), a lignocellulosic material coveted for its versatility, was investigated to immobilize crosslinked chitosan and remove Food red 17 (FR17) dye from aqueous solutions. LC/chitosan was crosslinked with epichlorohydrin (LC/CS/EPIC) and glutaraldehyde (LC/CS/GLUT). LC/CS/GLUT and LC/CS/EPIC presented an adequate morphology for mass transfer, relevant functional groups for adsorption. Furthermore, FR17 dye adsorption was favored at pH 2. Pseudo-second-order and Sips models represented the kinetic and isotherm data satisfactorily. The adsorption process for both adsorbents was endothermic, spontaneous, and favorable. The maximum adsorption capacity for LC/CS/GLUT was 77.66 mg g 1, and for LC/CS/EPIC was 43.01 mg g 1 for dye FR17. Furthermore, when reused, the adsorbents remain at around 70% of their original capacities after six adsorption cycles. Thus, the materials prepared from Luffa cylindrica and chitosan resulted in promising eco-friendly adsorbents.

• Autores: R. Schio, Rejiane da; DA BOIT MARTINELLO, KATIA; Netto, Matias S.; O. Silva, Luis F.; Mallmann, Evandro S.; Dotto, Guilherme Luiz
• Tipo de recurso: Article of journal
• Fecha de publicación: 2021
• Institución: Corporación Universidad de la Costa
• Repositorio: REDICUC - Repositorio CUC
• Idioma: eng
• OAI Identifier: oai:repositorio.cuc.edu.co:11323/9224
• Acceso en línea: https://hdl.handle.net/11323/9224; https://doi.org/10.1016/j.molliq.2021.118144; https://repositorio.cuc.edu.co/
• Palabra clave: Luffa cylindrical; Chitosan; Adsorption; Dye
• Rights: embargoedAccess
• License: Atribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)