Valorization of Citrus limon residues for the recovery of antioxidants: Evaluation and optimization of microwave and ultrasound application to solvent extraction

Giorgia Spigno, Farid Dahmoune, Lila Boulekbache, Kamal Moussi, Omar Aoun, Khodir Madani

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

102 Citazioni (Scopus)

Abstract

Microwave and ultrasound-assisted extraction of phenolic compounds from C. limon peels were compared.•Response surface methodology successfully employed to optimize the extraction processes.•Better performance of microwave extraction than both ultrasound and conventional process. Ultrasound assisted extraction (UAE) and microwave-assisted extraction (MAE) were optimized (by response surface methodology, RSM) and compared for the recovery of total phenolic compounds (TPC expressed as gallic acid equivalents (GAE)) from Citrus limon peels. The optimized result for MAE was 48% ethanol as extraction solvent, 28:1. mL/g of solvent: solid ratio, 123. s and 400. W for irradiation time and power. The optimized result for UAE was 63.93% ethanol as extraction solvent, 40. mL/g of liquid/solid ratio, 15.05. min of holding time and 77.79% for amplitude. Maximum predicted TPC recoveries under the optimized conditions for MAE and UAE were 15.74 and 15.08. mg GAE/g respectively, which were close to the experimental values of 15.78. ±. 0.8 and 15.22. ±. 0.88. mg GAE/g, indicating suitability of the employed model and the success of RSM in optimizing the extraction conditions. The antioxidant activity determined by the DPPH and reducing power tests confirmed the suitability of MAE for the preparation of antioxidant-rich plant extracts.
Lingua originaleEnglish
pagine (da-a)77-87
Numero di pagine11
RivistaIndustrial Crops and Products
Volume50
DOI
Stato di pubblicazionePubblicato - 2013

Keywords

  • Citrus limon peels
  • Microwave assisted extraction
  • Optimization
  • Phenolic compounds
  • Ultrasound assisted extraction

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