Naslov
KINETICS AND THERMODYNAMICS OF THE SOLID-LIQUID EXTRACTION PROCESS OF TOTAL POLYPHENOLS, ANTIOXIDANTS AND EXTRACTION YIELD FROM NETTLE (Urtica dioica L.)

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

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 2nd Natural resources, green technology and sustainable development / Radojčić Redovniković, Ivana ; Radošević, Kristina ; Jakovljević, Tamara ; Stojaković, Renata ; Gaurina Srček, Višnja ; Erdec Hendric, Dina - Zagreb : Prehrambeno-biotehnološki fakultet Sveučilišta u Zagrebu, 2016, 43-47

ISBN
978-953-6893-08-9

Skup
2nd Natural resources, green technology and sustainable development

Mjesto i datum
Zagreb, Hrvatska, 05.10.2016. - 07.10.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
solid-liquid extraction; total polyphenols; antioxidant capacity; extraction yield; kinetic modelling

Sažetak
Solid-liquid extraction process is a simple method used in many food industries. This method is widely used for effective separation of bioactive compounds from plant material. The goal of every extraction process is rapid and effective isolation of desired compounds from a plant matrix with high yield. In order to obtain the highest possible amount of bioactive compounds from plant material using solid-liquid extraction, detailed analysis of the extraction process dynamics is of upmost importance. According to literature data, solid-liquid extraction process usually follows a kinetic curve illustrating that the rate of mass transfer is not constant. The extraction curves usually consist of two phases ; constant extraction rate period and diffusion controlled period. To reduce the number of experiments and to get a good insight into the extraction process, mathematical modelling is often used. Mathematical modelling of solid–liquid extraction processes is an important engineering tool in process design in order to reduce energy, time and chemical reagents consumption. The possibility to extract the highest possible amount of valuable compounds in a short time is of significant interest for practice. In this work, solid-liquid extraction process of total polyphenols, antioxidants and extraction yield from nettle in batch reactor with continuous stirring and controlled temperature were analysed. The applicability of three kinetic models (Peleg’s, Page’s and Logarithmic model) for description of solid-liquid extraction was tested. To get detailed insight into the extraction process, initial extraction rate, extraction capacity, activation energy, Gibbs energy, enthalpy and entropy were determined.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija

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.

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