Adsorption and desorption characteristics of epigallocatechin-3-gallate from discarded green tea leaves on macroporous resin
Küçük Resim Yok
Tarih
2025
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Int Publ Ag
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Green tea (Camellia sinensis) is intensely consumed all over the world and tea leaves discarded from production are a rich source of catechins, especially epigallocatechin-3-gallate (EGCG). This study aimed to perform preparative separation of EGCG from green tea waste by using macroporous resin and to reveal adsorption and desorption characteristics. Nine types of resins were compared for their adsorption and desorption capacities and desorption rate of EGCG, and NKA-2 was found the most suitable resin for the purpose. Adsorption isotherms were evaluated at 25 degrees C, 35 degrees C and 45 degrees C. Experimental data were well described with pseudo-second-order kinetics model and fitted best to the Langmuir model in tested temperatures. In dynamic separation process, 83% of adsorbed EGCG was recovered from the resin by using 70% ethanol. It has been thought that using macroporous resin can be an effective way of EGCG separation from green tea waste for commercial purposes. [Graphical abstract]
Açıklama
Anahtar Kelimeler
Epigallocatechin-3-gallate, Green tea, Macroporous resin, Adsorption, Kinetics
Kaynak
Chemical Papers
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
79
Sayı
11
