Separation of anthocyanins extracted from red cabbage by adsorption onto chitosan films

Anthocyanin pigments are suitable as natural dyes for food, cosmetics and dietary supplements, due to the demand for healthier products and their antioxidant properties. This work aimed to extract the anthocyanin pigments from red cabbage and its separation of the solution by adsorption operation on...

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Published in:International journal of biological macromolecules 2019-06, Vol.131, p.905-911
Main Authors: Carvalho, Valéria V.L., Gonçalves, Janaína O., Silva, Adriano, Cadaval, Tito R., Pinto, Luiz A.A., Lopes, Toni J.
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Language:English
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Anthocyanin
Chitosan
Red cabbage
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cited_by cdi_FETCH-LOGICAL-c416t-2b57aeb5dec1af8c8b9a8697e59940162686e246db3da91d5568d52dc6e6f2503
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container_title International journal of biological macromolecules
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creator Carvalho, Valéria V.L.
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description Anthocyanin pigments are suitable as natural dyes for food, cosmetics and dietary supplements, due to the demand for healthier products and their antioxidant properties. This work aimed to extract the anthocyanin pigments from red cabbage and its separation of the solution by adsorption operation onto chitosan films. The anthocyanin was extracted from red cabbage in water hot at 90 °C by 15 min. Chitosan was obtained from shrimp waste, and its films were produced by casting technique (tensile strength of 25.1 ± 1.9 MPa, elongation of 10.5 ± 3.5% and thicknesses of 103.1 ± 1.3 μm). The anthocyanin adsorption assays were performed in batch, and the highest adsorption capacity was around 140 mg g−1. The equilibrium experimental data were adjusted by Henry, Langmuir and Freundlich models, and all models showed a good fitting (R2 ≥ 0.96 and ARE ≤ 6.5%). The thermodynamic parameters represented endothermic and physical adsorption. The kinetic behavior was evaluated by empirical models, being the pseudo-first order model that showed the best fitting (R2 ≥ 0.97 and ARE ≤ 8.5%). This work presented suitable information about the anthocyanin molecules immobilization onto chitosan films and, these results could be important to the use these pigments with chitosan in different areas. [Display omitted] •Anthocyanin was extracted from red cabbage and was adsorbed onto chitosan films.•Color parameters, FT-IR and SEM confirmed the anthocyanin retention onto films.•Equilibrium maximum adsorption capacity in monolayer was of 662.7 mg g−1 at 328 K.•Thermodynamic analysis revealed an endothermic, spontaneous and physical adsorption.•Pseudo-first order model showed best fitting, with adsorption capacity of 40 mg g−1.
doi_str_mv 10.1016/j.ijbiomac.2019.03.145
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This work presented suitable information about the anthocyanin molecules immobilization onto chitosan films and, these results could be important to the use these pigments with chitosan in different areas. [Display omitted] •Anthocyanin was extracted from red cabbage and was adsorbed onto chitosan films.•Color parameters, FT-IR and SEM confirmed the anthocyanin retention onto films.•Equilibrium maximum adsorption capacity in monolayer was of 662.7 mg g−1 at 328 K.•Thermodynamic analysis revealed an endothermic, spontaneous and physical adsorption.•Pseudo-first order model showed best fitting, with adsorption capacity of 40 mg g−1.</description><identifier>ISSN: 0141-8130</identifier><identifier>EISSN: 1879-0003</identifier><identifier>DOI: 10.1016/j.ijbiomac.2019.03.145</identifier><identifier>PMID: 30914365</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>Anthocyanin ; Chitosan ; Red cabbage</subject><ispartof>International journal of biological macromolecules, 2019-06, Vol.131, p.905-911</ispartof><rights>2019 Elsevier B.V.</rights><rights>Copyright © 2019 Elsevier B.V. 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subjects Anthocyanin
Chitosan
Red cabbage
title Separation of anthocyanins extracted from red cabbage by adsorption onto chitosan films
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