Aqueous Solutions of Surface-Active Ionic Liquids: Remarkable Alternative Solvents To Improve the Solubility of Triterpenic Acids and Their Extraction from Biomass
authors de Faria, ELP; Shabudin, SV; Claudio, AFM; Valega, M; Domingues, FMJ; Freire, CSR; Silvestre, AJD; Freire, MG
nationality International
journal ACS SUSTAINABLE CHEMISTRY & ENGINEERING
author keywords Biorefinery; Triterpenic acids; Solubility; Extraction; Surface-active ionic liquids; Apple peel
keywords URSOLIC ACID; APPLE PEELS; WAXES; FRUIT; FOODS
abstract Triterpenic acids (TTAs) are well-known for their relevant biological properties and have been facing an increasing interest for nutraceutical and pharmaceutical applications. To overcome the concerns associated with the commonly used volatile organic solvents for their extraction from biomass, here we investigate the potential of aqueous solutions of ionic liquids (ILs) as alternative solvents. The solubility of ursolic acid (UA) was first determined in several aqueous solutions of ILs (hydrotropes or surface-active) at 30 degrees C for evaluation of the dissolution phenomenon. Conventional surfactants were also investigated for comparison purposes. The collected data reveal a remarkable enhancement in the solubility of UA (8 orders of magnitude) in surface-active IL aqueous solutions when compared to that in pure water. Afterward, the potential of these IL aqueous solutions was confirmed by their use in the extraction of TTAs from apple peels. Total extraction yields of TTAs of 2.62 wt % were obtained using aqueous solutions of surface-active ILs at moderate conditions, overwhelming the extraction yields of 2.48 wt % obtained with chloroform and 1.37 wt % with acetone using similar conditions.
publisher AMER CHEMICAL SOC
issn 2168-0485
year published 2017
volume 5
issue 8
beginning page 7344
ending page 7351
digital object identifier (doi) 10.1021/acssuschemeng.7b01616
web of science category Chemistry, Multidisciplinary; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Engineering, Chemical
subject category Chemistry; Science & Technology - Other Topics; Engineering
unique article identifier WOS:000407410900109
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journal analysis (jcr 2017):
journal impact factor 6.140
5 year journal impact factor 6.415
category normalized journal impact factor percentile 87.588
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