Innovative strategy to improve β-carotene recovery from carrot peel extracts: ultrafiltration with layer-by-layer graphene oxide membrane coating


  • Nicole Novelli do Nascimento
  • Laiza Bergamasco Beltran
  • Fernanda Novelli Negrão
  • João Vitor de Araujo Silva
  • Rosângela Bergamasco
  • Angélica Marquetotti Salcedo Vieira



β-carotene, fouling, membrane technology, carrot peels, antioxidant activity, layer-by-layer membrane modification


Reuse of carrot peels from industrial residues has great potential for a high value-added by-product, such as the recovery and concentration of β-carotene. The use of this compound in food is an alternative to synthetic antioxidants. Commercial modified polymeric membranes are an eco-friendly, more economical, and fouling-reduced way to obtain this compound compared to other methods used. Thus, the objective of the present study was to recover it from the carrot peel extract obtained and a triple extraction with 70% ethanol. Ultrafiltration of this extract was performed on layer-by-layer membrane modification with sulfonic groups, polyethylene glycol and graphene oxide functionalized with tannic acid. Quantitative analysis showed purification of 70.35% of β-carotene in the first filtration cycle. This showed antioxidant activity by FRAP (131.30 µmol TE/g sample) and Folin Ciocauteu (129.84 mg/L). Characterization and performance analyze showed that the modified membrane has antifouling action with flux recovery rate of 89.24%. Thus, the modified membrane can be considered an emerging technology since it has low energy consumption and ecological methodology for the recovery and purification of β-carotene.


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How to Cite

do Nascimento, N. N., Beltran, L. B., Negrão, F. N., Silva, J. V. de A., Bergamasco, R., & Vieira, A. M. S. (2023). Innovative strategy to improve β-carotene recovery from carrot peel extracts: ultrafiltration with layer-by-layer graphene oxide membrane coating. OBSERVATÓRIO DE LA ECONOMÍA LATINOAMERICANA, 21(12), 27115–27137.




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