Pregled bibliografske jedinice broj: 1250984
Combined Ultrasound and Microwave Irradiation as an Efficient Technology for Grape-Stalk Anthocyanin Recovery
Combined Ultrasound and Microwave Irradiation as an Efficient Technology for Grape-Stalk Anthocyanin Recovery // International Journal of Green Technology, 6 (2020), 51-63 doi:10.30634/2414-2077.2020.06.05 (međunarodna recenzija, članak, znanstveni)
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Naslov
Combined Ultrasound and Microwave Irradiation as
an Efficient Technology for Grape-Stalk
Anthocyanin Recovery
Autori
Gunjević, Veronika ; Radojčić Redovniković, Ivana ; Stevanato, Livio ; Cravotto, Giancarlo
Izvornik
International Journal of Green Technology (2414-2077) 6
(2020);
51-63
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Enabling technologies ; extraction optimization ; green extraction ; NADES ; phytochemicals ; response surface methodology ; vinery industry by-product
Sažetak
Whereas the demand for plant derived bioactive compounds is constantly growing, there is a need for sustainable and cost-effective technologies for their recovery. Therefore, this study aims to optimize anthocyanin recovery from grape stalks, a winery industry by-product, to develop a fast and green extraction process. Natural Deep Eutectic Solvents (NADES) were used in the extraction process as a green alternative to classic acidified ethanol. Firstly, six different NADES were tested in anthocyanin extraction. The best performing NADES, in particular choline chloride: citric acid (ChCl:CA), was used in enabling- technology-assisted extractions ; ultrasound-, microwave-, and combined ultrasound-and microwave- assisted extractions (UMAE) were performed and UMAE gave the highest total anthocyanin content (TAC). This extraction was further optimized by response surface methodology using Design Expert software. The investigated process parameters were extraction time, temperature and water content in ChCl:CA, while two responses, TAC and energy consumption (EC) were monitored. The extraction was numerically optimized to maximize TAC and minimize EC. Finally, the optimal conditions are as follows: extraction time 5 min, temperature 90 °C and water content in ChCl:CA 30%. The TAC obtained under these conditions is 0.79 mg/g. Conventional anthocyanin extraction performed for 2 h with acidified ethanol gave a yield of 1.04 mg/g. However, EC was 95.6% higher, demonstrating that UMAE provides dramatic extraction time reductions with higher efficiency. In addition, ChCl:CA was successfully recycled and the anthocyanins were isolated from the optimal extract.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
