FEIJOA SELLOWIANA KABUKLARINDAN POLİFENOLLERİN KATI-SIVI EKSTRAKSİYONUNDA ÇEŞİTLİ PARAMETRELERİNİN İNCELENMESİ: KÜTLE İLETİMİ, KİNETİK VE TERMODİNAMİK ÇALIŞMALAR

Yıl 2023, Cilt: 1 Sayı: 1, 43 - 52, 27.12.2023

Ramiz Abishli , Selin Şahin Sevgili

Öz

Bu çalışmada feijoa (Feijoa sellowiana) kabuklarından polifenol geri kazanımı kütle transferi, kinetik ve termodinamik yaklaşımlar açısından incelenmiştir. Ultrason destekli ekstraksiyon (UDE) kullanılMIŞTIR. 3 farklı genlikte (%10, 15 ve 20) çalışılmıştır. İlk beş dakika içinde her üç sistemin de dengeye ulaştığı gözlendi. Enerjinin genliğinin arttırılması ortamın sıcaklığını arttırdı ve bu durumda verim bir miktar arttı (≈ 17 mg-GAE/g-DP'den ≈ 18 mg-GAE/g-DP'ye). UDE sisteminde difüzyon katsayısı 2,120×10⁻8 ile 3,995×10⁻8 m²/dk arasında değişiyordu. Biot sayısı 150.333×10³ ile 206.867×10³ arasında değişirken, kütle transfer katsayısı 9.507 ile 14.050 m/dk arasında hesaplandı. UDE sisteminin kinetik verileri her iki kinetik modelle (R2>0.97) temsil edildi. Ayrıca her iki kinetik modelin hız sabitlerinin (k1 ve k2) genel olarak sıcaklıkla arttığı gözlenmiştir. UDE sisteminin termodinamik yapısı ∆H (>0), ∆S (>0) ve ∆G (<0) gibi parametrelerle değerlendirildiğinde sistemin endotermik, kendiliğinden ve düzensizliğe doğru ilerlediği görülmektedir.

Anahtar Kelimeler

Biot Sayısı, Biyoaktif Metabolitler, Biyoatık, Etkin Yayılma, Ultrason Teknolojisi

INVESTIGATION OF THE SOLID-LIQUID EXTRACTION PARAMETERS OF THE POLYPHENOLS FROM FEIJOA SELLOWIANA PEELS: MASS TRANSFER, KINETICS, AND THERMODYNAMICS STUDIES

Öz

In this study, polyphenol recovery from feijoa (Feijoa sellowiana) peels was investigated in terms of mass transfer, kinetics and thermodynamics approaches. Ultrasound-assisted extraction (UAE) was employed. 3 different amplitudes (10, 15 and 20%) were use. It was observed that all three systems reached equilibrium within the first five minutes. Increasing the amplitude of the energy increased the temperature of the environment, and in this case, the efficiency increased slightly (≈ 17 mg-GAE/g-DP to ≈ 18 mg-GAE/g-DP). In the UAE system, the diffusion coefficient varied between 2.120×10⁻8 and 3.995×10⁻8 m²/min. The Biot number changed between 150.333×10³ and 206.867×10³, while the mass transfer coefficient was calculated between 9.507 and 14.050 m/min. The kinetic data of the UAE system was represented by both kinetic models (R2>0.97). Additionally, it was observed that the rate constants (k1 and k2) of both kinetic models generally increased with temperature. When the thermodynamic structure of the UAE system was evaluated with parameters such as ∆H (>0), ∆S (>0) and ∆G (<0), the system has been endothermic, spontaneous and moving towards disorder.

Anahtar Kelimeler

Bioactive Metabolites, Biot Number, Biowaste, Effective Diffusivity, Ultrasound Technology

Kaynakça

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