Open AccessGreen Compressed Fluid Technologies To Extract Antioxidants and Lipids from Galdieria phlegrea in a Biorefinery Approach
Author(s) -
Paola Imbimbo,
Mónica Bueno,
Luigi D’Elia,
Antonino Pollio,
Elena Ibáñez,
Giuseppe Olivieri,
Daria Maria Monti
Publication year - 2020
Publication title -
acs sustainable chemistry and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.878
H-Index - 109
ISSN - 2168-0485
DOI - 10.1021/acssuschemeng.9b07505
Subject(s) - carotenoid , chemistry , supercritical fluid extraction , biorefinery , extraction (chemistry) , chromatography , zeaxanthin , squalene , supercritical fluid , ultrafiltration (renal) , cell disruption , raw material , lutein , organic chemistry , food science
A green cascade approach was used to recover phycocyanins, carotenoids and lipids from Galdiera phlegrea . Phycocyanin extraction was performed by high pressure homogenization and purified by ultrafiltration, whereas carotenoids were obtained by a pressurized liquid extraction and lipids by supercritical fluid extraction. The second step of this innovative, green, and cost-effective procedure is able to improve the recovery of zeaxanthin and β-carotene up to 40%, without affecting the quality of compounds and avoiding the use of organic solvents and the drying processes. The isolated carotenoids were active as antioxidants, as clearly shown by their protective activity on a cell-based model. The lipid yield was increased by 12% with respect to conventional methods.