Modeling of anthocyanins adsorption onto chitosan films: An approach using the pore volume and surface diffusion model
The use of smart packaging is a global trend, and several works are being reported in this sense. Special attention is given to biodegradable materials like chitosan and natural pigments like anthocyanins. For example, previous studies report that it is possible to produce smart packaging by extract...
- Autores:
-
Carvalho, Valéria V.L.
Pinto, Diana
Salau, Nina P.G.
Pinto, Luiz A.A.
Cadaval, Tito R.S.
Silva, Luis F.O.
Lopes, Toni J.
Dotto, Guilherme L.
- Tipo de recurso:
- Article of investigation
- Fecha de publicación:
- 2022
- Institución:
- Corporación Universidad de la Costa
- Repositorio:
- REDICUC - Repositorio CUC
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.cuc.edu.co:11323/10882
- Acceso en línea:
- https://hdl.handle.net/11323/10882
https://repositorio.cuc.edu.co
- Palabra clave:
- Adsorption
Anthocyanins
Films
Mass transfer
Red cabbage
- Rights
- openAccess
- License
- Atribución-NoComercial 4.0 Internacional (CC BY-NC 4.0)
| Summary: | The use of smart packaging is a global trend, and several works are being reported in this sense. Special attention is given to biodegradable materials like chitosan and natural pigments like anthocyanins. For example, previous studies report that it is possible to produce smart packaging by extracting anthocyanins from red cabbage and adsorbing it into chitosan films. This work elucidates for the first time the mass transfer aspects in the anthocyanins adsorption on chitosan films (CFS). Anthocyanins were extracted from red cabbage and subsequently adsorbed from the leach liquor using chitosan films. The Freundlich model well represented the adsorption isotherms of anthocyanins on CFS. In addition, the PVSDM (pore volume and surface diffusion model) model was implemented to represent the adsorption data and to elucidate the mass transfer. This model was suitable to represent the adsorption data, with a coefficient of determination (R2) higher than 0.95 and an average relative error (ARE) lower than 2.00%. The surface diffusion coefficient values (DS) ranged from 3.70 × 10−10 cm2 s−1 to 1.16 × 10−9 cm2 s−1. The external mass transfer coefficient (kF) was in the range of 10−2 cm s−1. Finally, the Biot number (Bi) revealed that mechanisms inside the particle controlled the anthocyanin's adsorption onto CFS. |
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