Deep eutectic solvents vs ionic liquids: Similarities and differences

Płotka‐Wasylka, Justyna; Guárdia, Miguel de la; Andruch, Vasiľ; Vilková, Mária

doi:10.1016/j.microc.2020.105539

Cited by 345 publications

(170 citation statements)

References 28 publications

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“…Once again, this tends to encourage the use of DESs and, more particularly, NADESs. Indeed, DESs are usually known to be less toxic and more biodegradable than ILs [236]. However, statements about DESs' low toxicity are based on the low toxicities of their individual components; however, DESs are not necessarily as low in toxicity as their constituents.…”

Section: Environmental Impactmentioning

confidence: 99%

Recovery of Rare Earth Elements (REEs) Using Ionic Solvents

et al. 2021

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Rare earth elements (REEs) are becoming more and more significant as they play crucial roles in many advanced technologies. Therefore, the development of optimized processes for their recovery, whether from primary resources or from secondary sources, has become necessary, including recovery from mine tailings, recycling of end-of-life products and urban and industrial waste. Ionic solvents, including ionic liquids (ILs) and deep-eutectic solvents (DESs), have attracted much attention since they represent an alternative to conventional processes for metal recovery. These systems are used as reactive agents in leaching and extraction processes. The most significant studies reported in the last decade regarding the recovery of REEs are presented in this review.

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Section: Environmental Impactmentioning

confidence: 99%

Recovery of Rare Earth Elements (REEs) Using Ionic Solvents

et al. 2021

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“…Ionic liquids are also known as neoteric solvents, designer solvents, ionic fluids, and molten salts. The strong ionic interaction results in a negligible vapor pressure with high-thermal stability, which constitutes a group of non-conventional solvents, further divided into task-specific ILs, room-temperature ILs and polyionic ILs [ 42 , 43 , 44 ]. Deep eutectic solvents (DESs) correspond to an alternative for ionic liquids; but some authors also consider DESs a sub-type of ionic liquids as they have similar properties [ 43 ].…”

Section: Environmentally Friendly Techniques In the Extraction Of mentioning

confidence: 99%

“…The reduction in the melting point comes mainly from the formation of hydrogen bonds and Van der Waals interactions [ 45 ]. Apart from the melting point, both DESs and ionic liquids present variations in other physicochemical properties such as viscosity, density, conductivity, acidity, surface tension, volatility, and the freezing point, which are affected by the type of co-solvent, either water or an organic solvent [ 43 ].…”

Section: Environmentally Friendly Techniques In the Extraction Of mentioning

confidence: 99%

“…The advantage of using a DES, with respect to other solvents, is that DESs have similar physical properties with low vapor pressure and low flammability and, in addition, they are cheaper, less dangerous, stable, biodegradable, easy to prepare, and customizable according to their application. However, the efficiency of DESs may be affected by pH variation [ 43 ].…”

Section: Environmentally Friendly Techniques In the Extraction Of mentioning

confidence: 99%

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Environmentally Friendly Techniques and Their Comparison in the Extraction of Natural Antioxidants from Green Tea, Rosemary, Clove, and Oregano

Calderón‐Oliver

Ponce‐Alquicira

2021

Molecules

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Many current food and health trends demand the use of more ecological, sustainable, and environmentally friendly techniques for the extraction of bioactive compounds, including antioxidants. However, extraction yields and final antioxidant activities vary between sources and are highly influenced by the given extraction method and nature and ratio of the employed solvent, especially for total polyphenols, flavonoids, and anthocyanins, which are well recognized as natural antioxidants with food applications. This review focused on the most common extraction techniques and potential antioxidant activity in the food industry for various natural antioxidant sources, such as green tea, rosemary, clove, and oregano. Green extraction techniques have been proven to be far more efficient, environmentally friendly, and economical. In general, these techniques include the use of microwaves, ultrasound, high hydrostatic pressure, pulsed electric fields, enzymes, and deep eutectic solvents, among others. These extraction methods are described here, including their advantages, disadvantages, and applications.

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“…DESs and ILs have several similarities, such as low vapor pressure, high tunability, nonflammability, and easiness to solvate either organic and inorganic compounds. However, a DES cannot be classified as a type of IL and the terms cannot be used interchangeably, as their nature and preparation differ [48]. The synthesis of DESs can be done by several strategies, but they are mainly prepared by mixing both components (HBA and HBD) under continuous stirring and heating, until a homogeneous liquid is formed.…”

Section: Des-based Ffsmentioning

confidence: 99%

The Use of Ferrofluids in Analytical Sample Preparation: A Review

2021

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Ferrofluids (FFs) constitute a type of tunable magnetic material, formed by magnetic nanoparticles suspended in a liquid carrier. The astonishing magnetic properties of these materials and their liquid nature have led to their extended use in different applications, including fields such as magnetochemistry, optics, and biomedicine, among others. Recently, FFs have been incorporated as extractant materials in magnetic-driven analytical sample preparation procedures, thus, permitting the development of different applications. FF-based extraction takes advantage of both the magnetic susceptibility of the nanoparticles and the properties of the liquid carrier, which are responsible for a wide variety of interactions with analytes and ultimately are a key factor in achieving better extraction performance. This review article classifies existing FFs in terms of the solvent used as a carrier (organic solvents, water, ionic liquids, deep eutectic solvents, and supramolecular solvents) while overviewing the most relevant analytical applications in the last decade.

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Deep eutectic solvents vs ionic liquids: Similarities and differences

Cited by 345 publications

References 28 publications

Recovery of Rare Earth Elements (REEs) Using Ionic Solvents

Recovery of Rare Earth Elements (REEs) Using Ionic Solvents

Environmentally Friendly Techniques and Their Comparison in the Extraction of Natural Antioxidants from Green Tea, Rosemary, Clove, and Oregano

The Use of Ferrofluids in Analytical Sample Preparation: A Review

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