Naslov
Kinetics and thermodynamics of the solid-liquid extraction process of total polyphenols, antioxidants and extraction yield from Asteraceae plants

Autori
Jurinjak Tušek, Ana ; Benković, Maja ; Belščak-Cvitanović, Ana ; Valinger, Davor ; Jurina, Tamara ; Gajdoš Kljusurić, Jasenka

Izvornik
Industrial crops and products (0926-6690) 91 (2016); 205-214

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
solid-liquid extraction ; asteraceae plants ; total polyphenols ; antioxidants ; extraction yield ; kinetic modelling

Sažetak
Antioxidants derived from plants are widely used in dietary supplements and have been investigated for the prevention of diseases such as cancer, coronary heart disease and altitude sickness. In order to obtain the highest possible amount of bioactive compounds from plant material, effective extraction procedures are required. One of the most widely used extraction techniques which requires no toxic chemicals is solid-liquid extraction. Mathematical modelling of solid–liquid extraction processes is an important engineering tool in the design process in order to reduce energy, time and chemical reagents consumption. In agreement with that, the aim of this paper was determination of the best suited kinetic model for description of the solid-liquid extraction of bioactive compounds from Asteraceae family plants. In this study, four most common representatives of Asteraceae family were chosen as subjects: camomile (Matricaria recutita L.), dandelion (Taraxacum officinale Web.), marigold (Calendula officinalis) and yarrow (Achillea millefolium L.). Initial extraction rate, extraction capacity, activation energy, Gibbs energy, enthalpy and entropy were determined for all of the four analysed plants. The highest extraction efficiency of total polyphenols content, antioxidants and extraction yield were achieved at the highest extraction temperature of T = 80 °C for all four plants used in this study. Obtained results for activation enthalpies indicated that the extraction processes were endothermic and Gibbs free energy of activation indicated that they were endergonic and not spontaneous.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija, Prehrambena tehnologija

Napomena
Ovaj rad doprinos je projektu HR.3.2.01-0069 "Primjena mikroreaktora u praćenju antioksidacijske aktivnosti samoniklog bilja (MICRO-AA)" koji je finciran sredstvima Europskog socijalnog fonda u sklopu programa Razvoj ljudskih potencijala.

POVEZANOST RADA