RT info:eu-repo/semantics/article
T1 Production of purified hemicellulose-pectin fractions of different molecular weight from discarded carrots by hydrothermal treatment followed by multistep ultrafiltration/diafiltration
A1 Ramos Andrés, Marta
A1 Aguilera Torre, Beatriz
A1 García Serna, Juan
K1 Hemicellulose
K1 Hemicelulosa
K1 Pectin
K1 Pectina
K1 Polydispersity
K1 Polidispersidad
AB Hemicelluloses and pectins are good candidates as biopolymers for the formation of products such as packaging films. Purified freeze-dried fractions of hemicelluloses and pectins, of different molecular weights, were obtained by treating hydrothermal extracts (140, 160, and 180 °C) of discarded carrots with ultrafiltration membranes (30, 10, 5, and 1 kDa). After each ultrafiltration, several cycles of diafiltration with partial water reuse were applied, obtaining a better separation and purification. A cascade configuration (30-10-5-1 kDa) was used in the 140 and 160 °C extracts, and a mixed configuration (5-10-1 kDa) in the 180 °C extract. High molecular weight hemicelluloses increased in concentration by a factor of 5 in the cascade configuration and by a factor of 16.67 in the mixed configuration. A high removal of free sugars (98.9–99.5 wt%) and by-products (94.4–99.2 wt%) through 1 kDa permeate and diafiltration waters was obtained. The system allowed moving from feeds with molecular weight, polydispersity, and purity in the ranges 9.02–18.83 kDa, 16.2–31.6, and 30.12–33.51 wt% to fractions with values in the ranges 2.59–102.75 kDa, 1.2–4.0, and 73.1–100 wt%.
PB Elsevier
SN 0959-6526
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/49015
UL https://uvadoc.uva.es/handle/10324/49015
LA eng
NO Journal of Cleaner Production, 2021, vol. 321, 128923
NO Producción Científica
DS UVaDOC
RD 29-abr-2024