Green Solvents for the Extraction of High Added-Value Compounds from Agri-food Waste

Torres‐Valenzuela, Laura Sofía; Ballesteros‐Gómez, Ana; Rubio, Soledad

doi:10.1007/s12393-019-09206-y

Cited by 133 publications

(64 citation statements)

References 148 publications

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“…Murador and collaborators [95] summarize the main chemical constituents of these ILs and NADES and mention some works where they are applied in the extraction of antioxidant compounds, such as phenolic compounds and carotenoids, among others. Specifically, ILs and NADES have been applied to the phenolic compounds and other antioxidant compounds extraction from lignocellulosic biomass and agri-food wastes [4,6,93,[96][97][98].…”

Section: Extraction Solventsmentioning

confidence: 99%

“…For example, in the case of water as an extraction solvent in PLE (subcritical water extraction), the water is heated over 100 • C increasing pressure above atmospheric conditions. In the particular case of water, the dielectric constant decreases and water can reach behaviors similar to organic solvents [4,106,122]. Moreover, the possibility of using organic solvents decreases the polarity of the extraction fluid, making the extraction more selective and directed to the compounds of interest, such as phenolic compounds [122].…”

Section: Pressurized Liquid Extractionmentioning

confidence: 99%

“…Nowadays, 5 billion tons of biomass residues from agroforestry and food industries are estimated worldwide and represent an emission for 3.3 billion tonnes of carbon dioxide each year [4,5]. In the EU, the total annual biowaste is estimated at around 100 million tonnes, generating a negative ecological impact [6].…”

Section: Introductionmentioning

confidence: 99%

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Green and Sustainable Valorization of Bioactive Phenolic Compounds from Pinus By-Products

et al. 2020

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In Europe, pine forests are one of the most extended forests formations, making pine residues and by-products an important source of compounds with high industrial interest as well as for bioenergy production. Moreover, the valorization of lumber industry residues is desirable from a circular economy perspective. Different extraction methods and solvents have been used, resulting in extracts with different constituents and consequently with different bioactivities. Recently, emerging and green technologies as ultrasounds, microwaves, supercritical fluids, pressurized liquids, and electric fields have appeared as promising tools for bioactive compounds extraction in alignment with the Green Chemistry principles. Pine extracts have attracted the researchers’ attention because of the positive bioproperties, such as anti-inflammatory, antimicrobial, anti-neurodegenerative, antitumoral, cardioprotective, etc., and potential industrial applications as functional foods, food additives as preservatives, nutraceuticals, pharmaceuticals, and cosmetics. Phenolic compounds are responsible for many of these bioactivities. However, there is not much information in the literature about the individual phenolic compounds of extracts from the pine species. The present review is about the reutilization of residues and by-products from the pine species, using ecofriendly technologies to obtain added-value bioactive compounds for industrial applications.

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Section: Extraction Solventsmentioning

confidence: 99%

Section: Pressurized Liquid Extractionmentioning

confidence: 99%

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Green and Sustainable Valorization of Bioactive Phenolic Compounds from Pinus By-Products

et al. 2020

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“…Contemporary trends in green extraction techniques mainly pertain to the minimization of solvent use, processes with low-energy requirements, and novel eco-friendly materials that are environmentally benign. The strongest scientific tendencies that are related to sustainable perspectives of natural product separation from waste are those addressing the issue of solvent selection [3,4]. Selection is principally associated with the green profile of the process as a whole, and critical parameters, such as the physical-chemical characteristics of the compounds of interest, selectivity, high recovery yields, and stability of the target compounds, are the key criteria considered.…”

Section: Introductionmentioning

confidence: 99%

Green Valorization of Olive Leaves to Produce Polyphenol-Enriched Extracts Using an Environmentally Benign Deep Eutectic Solvent

et al. 2020

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Olive leaves (OLL) are considered to be a highly appreciated bioresource of bioactive polyphenolic phytochemicals, embracing several different structures. However, extraction processes based on deep eutectic solvents (DES) are very limited despite the wide range of techniques developed for the efficient recovery of polyphenols. This study had as objective the development of a simple, green, high-performance extraction methodology for OLL polyphenols, using a recently reported effective DES, composed of L-lactic acid and glycine. Initially, a screening was performed to select the most appropriate L-lactic/glycine molar ratio and process optimization was then carried out with response surface methodology. The optimized process variable values were DES/water (78% w/v), liquid-to-solid ratio of 36 mL g−1, and stirring speed of 500 rounds per minute, and the total polyphenol yield amounted to 97.53 ± 3.54 mg gallic acid equivalents per g dry matter. Extraction with DES at 80 °C did not significantly increase the total polyphenol yield, but it did enhance the total flavonoid yield and antioxidant activity. High-performance liquid chromatography analyses revealed that extraction with the DES resulted in extended oleuropein hydrolysis, to the favor of hydroxytyrosol formation. This finding might have a prospect in using properly tuned DES for polyphenol modification with improved bioactivities.

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“…However, SFE is not economically viable due to high operational costs despite the excellent extraction properties. As alternative solvents many authors propose the use of ionic liquids or bio-based solvents for the more polar compounds such as alkaloids, terpenoids, flavonoids, saponins, phenolic compounds (Chemat and Vian, 2014;Torres-Valenzuela et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

Are Ionic Liquids Better Extracting Agents Than Toxic Volatile Organic Solvents? A Combination of Ionic Liquids, Microwave and LC/MS/MS, Applied to the Lichen Stereocaulon glareosum

et al. 2020

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Green Solvents for the Extraction of High Added-Value Compounds from Agri-food Waste

Cited by 133 publications

References 148 publications

Green and Sustainable Valorization of Bioactive Phenolic Compounds from Pinus By-Products

Green and Sustainable Valorization of Bioactive Phenolic Compounds from Pinus By-Products

Green Valorization of Olive Leaves to Produce Polyphenol-Enriched Extracts Using an Environmentally Benign Deep Eutectic Solvent

Are Ionic Liquids Better Extracting Agents Than Toxic Volatile Organic Solvents? A Combination of Ionic Liquids, Microwave and LC/MS/MS, Applied to the Lichen Stereocaulon glareosum

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