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Chitosan-PEO nanofiber mats for copper removal in aqueous solution using a new versatile electrospinning collector

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Cardenas Bates, I. I. et Loranger, É et Chabot, B. (2020). Chitosan-PEO nanofiber mats for copper removal in aqueous solution using a new versatile electrospinning collector. SN Applied Sciences, 2 (9). ISSN 2523-3971 DOI 10.1007/s42452-020-03342-5

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Résumé

Electrospun chitosan–polyethylene oxide nanofiber mats were fabricated using a new collector design. Besides being reusable, it allows to assess the desired morphology of the mat in a quicker way. To test its efficiency, nonwoven mats designed for water treatment applications were prepared using conditions never been reported before. Under these conditions, continuous and flawless nanofibers of 151 ± 36 nm in diameter were achieved. Adsorption capacity of the mats for copper ions in aqueous solutions were investigated. Results showed that sorption equilibrium was achieved within 150 min with a homogenous distribution of copper ions within the nanofibrous mats. The pseudo-second order kinetic model best fitted the experimental data. The Langmuir isotherm best described the sorption process with a maximum adsorption capacity of 124 mg/g for trial temperatures ranging from 25 to 60 °C. Thermodynamic parameters (ΔG°, ΔH° and ΔS°) demonstrate that the adsorption was feasible, endothermic and spontaneous. The desorption potential and mat’s reusability were also studied. Results reveal that the electrospun chitosan mats can be desorbed and reused up to 5 cycles without significant loss in adsorption performance. © 2020, Springer Nature Switzerland AG.

Type de document: Article
Mots-clés libres: chitosan electrospun nanofibers copper ions adsorption electrospinning collector sorbent reusability water purification adsorption chitosan copper desorption isotherms metal ions polyethylene oxides reusability water treatment adsorption capacities adsorption performance desorption potentials Its efficiencies Langmuir isotherm pseudo-second-order kinetic models sorption equilibria thermodynamic parameter nanofibers
Date de dépôt: 01 juill. 2021 14:00
Dernière modification: 01 juill. 2021 14:05
Version du document déposé: Post-print (version corrigée et acceptée)
URI: http://depot-e.uqtr.ca/id/eprint/9645

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