Adsorption and desorption characteristics of epigallocatechin-3-gallate from discarded green tea leaves on macroporous resin

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dc.contributor.authorBilcanoglu Cagan, Basak
dc.contributor.authorKarakaya, Huseyin
dc.contributor.authorYilmaztekin, Murat
dc.date.accessioned2026-04-04T13:37:26Z
dc.date.available2026-04-04T13:37:26Z
dc.date.issued2025
dc.departmentİnönü Üniversitesi
dc.description.abstractGreen 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]
dc.description.sponsorshipInonu University Scientific Research Projects Commission [2015/21]
dc.description.sponsorshipThis work was supported by Inonu University Scientific Research Projects Commission (Grant number 2015/21).
dc.identifier.doi10.1007/s11696-025-04305-z
dc.identifier.endpage8065
dc.identifier.issn0366-6352
dc.identifier.issn2585-7290
dc.identifier.issue11
dc.identifier.orcid0000-0002-6311-473X
dc.identifier.orcid0000-0002-5667-9169
dc.identifier.scopus2-s2.0-105014014892
dc.identifier.scopusqualityQ2
dc.identifier.startpage8055
dc.identifier.urihttps://doi.org/10.1007/s11696-025-04305-z
dc.identifier.urihttps://hdl.handle.net/11616/109799
dc.identifier.volume79
dc.identifier.wosWOS:001556005100001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer Int Publ Ag
dc.relation.ispartofChemical Papers
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250329
dc.subjectEpigallocatechin-3-gallate
dc.subjectGreen tea
dc.subjectMacroporous resin
dc.subjectAdsorption
dc.subjectKinetics
dc.titleAdsorption and desorption characteristics of epigallocatechin-3-gallate from discarded green tea leaves on macroporous resin
dc.typeArticle

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