RT Journal Article
T1 Application of aqueous two phase systems based on polyethylene glycoland sodium citrate for the recovery of phenolic compounds from eucalyptus wood
A1 Xavier Saavedra, Ana Lucía
A1 Freire Leira, María Sonia
A1 Vidal Tato, María Isabel
A1 González Álvarez, Julia
K1 Aqueous two-phase systems
K1 Biomass wastes
K1 Eucalyptus wood
K1 Natural antioxidants
K1 Polyethylene glycol
K1 Sodium citrate
AB This paper proposes an alternative way to intensify the exploitation of Eucalyptus wood wastes before valorisation for energy production. An aqueous two-phase system (ATPS) based on PEG 2000 and sodium citrate was investigated for the recovery of phenolic compounds that could act as natural antioxidants for applications including cosmetics, pharmaceuticals, food additives and other industrial applications. The influence of the tie line length (TLL) (26,1-46,1%), extraction temperature (25-65ºC), extraction time (90-390 min) and phase settlement time (1-8 h) were studied. Phenolic compounds were concentrated preferentially in the PEG-rich phase. A partition coefficient of 38 and a total phenols yield of 1,29 mg gallic acid equivalent/100 mg wood dry basis were obtained under the operational conditions selected: TLL, 46,1%, temperature 65ºC, extraction time 90 min and settlement time 1 h. Analysis of the extracts by RP-HPLC-ESI-TOF confirmed the presence of various phenolic compounds with demonstrated antioxidant activity: monogalloyl glucose, (-)-gallic acid, ellagic acid and quercetin 3-O-rhamnoside
PB Universidad Bio-Bio
SN 0718-221X
YR 2015
FD 2015
LK http://hdl.handle.net/10347/21618
UL http://hdl.handle.net/10347/21618
LA eng
NO Xavier, L. Freire Leira, M.S., Vidal Tato, M.I. y González Álvarez, J. (2015). Application of aqueous two phase systems based on polyethylene glycoland sodium citrate for the recovery of phenolic compounds from eucalyptus wood. "Maderas. Ciencia y tecnología", vol. 17 (2), 342-354
NO The authors gratefully acknowledge the support of the company Aserpal S.A. that provided the Eucalyptus wood veneer trimmings used to carry out this research. The authors also want to thank the EMUNDUS17 project (Uruguay) for a grant awarded to Lucía Xavier
DS Minerva
RD 24 abr 2026