Tropical fruit waste‐derived mesoporous rock‐like Fe 2 O 3 /C composite fabricated with amphiphilic surfactant‐templating approach showing massive potential for high‐tech applications

Agro-industries waste from fruits can present a promising source for industrial sectors with the extraction of active principles that have several biological activities. In view of the above, this study aimed to evaluate the biological potential of tropical fruit extracts against antioxidant and amnmicrobial activities. The study evaluated different methods of antioxidant activities (by DPPH and FRAP method), characterization and quantification of phenolic compounds by High Performance Liquid Chromatography (HPLC), antibacterial and antifungal activities of four tropical fruit waste extract. In the extracts were identified several phenolic compounds, the values found were varied from 0.21 to 5.73 mg/L in gallic acid, observing the predominance of gallic acid, catechin, chlorogenic and acid p-coumaric. The antibacterial activity was evaluated by the agar diffusion method using the microorganism Listeria monocytogenes, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Salmonella cholerasuis. The antifungal activity was determined by the disc diffusion technique using Aspergillus carbonarius, Aspergillus niger, Aspergillus flavus, Penicillium commune and Penicillium cladosporoides, the extracts showed potential antioxidant activity, antibacterial and antifungal in both tests. The lemon extract showed no inhibition for the fungi.

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Towards a green and sustainable fruit waste valorisation model in Brazil: optimisation of homogenizer-assisted extraction of bioactive compounds from mango waste using a response surface methodology

Pure and Applied Chemistry ◽

10.1515/pac-2019-1001 ◽

2020 ◽

Vol 92 (4) ◽

pp. 617-629 ◽

Cited By ~ 4

Author(s):

Vânia G. Zuin ◽

Mateus L. Segatto ◽

Karine Zanotti

Keyword(s):

Bioactive Compounds ◽

Water Concentration ◽

Solvent Ratio ◽

Tropical Fruit ◽

Sustainable Technologies ◽

Green Approach ◽

Waste Valorisation ◽

Assisted Extraction ◽

Fruit Waste ◽

Time And Energy

AbstractFood waste valorisation is currently at the core of discussions and development of future economic models which, allied to the application of green and sustainable technologies, offers a viable alternative to shift industrial practices towards a circular bioeconomy. The feasibility and technological possibilities based on an integrated mango waste biorefinery concept, focusing on the extraction of bioactive compounds, are discussed in this paper. Additionally, a statistically robust methodology is presented as a green approach to optimise the variables of a sustainable, low time and energy consumption extraction technique (homogenizer-assisted extraction). Maximum concentrations of the bioactive compounds were obtained in similar values of parameters ethanol/water concentration (67.73 and 70.11 %), sample/solvent ratio (29.33 and 28.17 %) and time (4.47 and 5.00 min) for mangiferin (354.4 mg/kg DW) and hyperoside (258.7 mg/kg DW), respectively. These results demonstrated the efficiency of the proposed green and sustainable method to obtain bioactive compounds from a very common and significant tropical fruit waste in Brazil, based on an integrated mango biorefinery concept.

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