Removal of alkali and transition metal ions from water with hydrophobic deep eutectic solvents

Osch, Dannie J. G. P. van; Parmentier, Dries; Dietz, Chjt Carin; Bruinhorst, Adriaan van den; Tuinier, Remco; Kroon, MC Maaike

doi:10.1039/c6cc06105b

Cited by 213 publications

(129 citation statements)

References 22 publications

Supporting

Mentioning

125

Contrasting

Unclassified

Order By: Relevance

“…In the same direction, Coutinho's group proposed natural hydrophobic ESs based on terpenoids ( l (−)‐menthol and thymol) combined with several carboxylic acids. Other hydrophobic ESs based on lidocaine and decanoic acid at several molar ratios were also proposed . Other sustainable hydrophobic ESs composed of two compounds from the same family (i.e., long‐chain fatty acids) were also proposed .…”

Section: Hydrophobic (Deep) Eutectic Solventsmentioning

confidence: 99%

Quest for Green‐Solvent Design: From Hydrophilic to Hydrophobic (Deep) Eutectic Solvents

2019

View full text Add to dashboard Cite

Deep eutectic solvents (DESs) consist of a mixture of two or more solid components, which gives rise to a lower melting point compared to the starting materials. Until recently only hydrophilic DESs were available, and despite their revolutionary role in the alternative‐solvents field, important issues in chemistry, and chemical engineering (such as water‐related problems and the replacement of toxic volatile organic compounds) could not be tackled. Hydrophobic (deep)—here in parenthesis due to the different depths of the eutectic melting points—eutectic solvents are a subclass of DESs where both components are hydrophobic. The low toxicity, high biodegradability, and straightforward preparation without further purification steps of naturally occurring low‐cost compounds are among the key advantages. Although research on hydrophobic DESs is scarce (the first report was only published in 2015), some interesting features and applications have been reported and deserve to be evaluated and comparisons established. This Minireview is divided into two parts: The first part provides a brief general introduction to DESs and the second part discusses the nomenclature using solid–liquid phase diagram analysis, chemical stability, thermophysical properties comparison, and finally the most important emerging fields of application.

show abstract

Section: Hydrophobic (Deep) Eutectic Solventsmentioning

confidence: 99%

Quest for Green‐Solvent Design: From Hydrophilic to Hydrophobic (Deep) Eutectic Solvents

2019

View full text Add to dashboard Cite

show abstract

“…In 2015, Kroon and co‐workers first reported the preparation and the usefulness of hydrophobic DESs, consisting of a fatty acid and a quaternary ammonium salt, for the recovery of volatile fatty acids from diluted aqueous solution, and for CO 2 capture . Hydrophobic DESs consisting of decanoic acid and lidocaine in various proportions proved to be effective as well for the removal of metal ions from non‐buffered water . In parallel, Marrucho and co‐workers synthesized and characterized novel hydrophobic mixtures composed of dl ‐menthol and naturally occurring carboxylic acids, and tested (a) their extraction efficiencies towards biomolecules, and (b) for the extraction of pesticides from aqueous environment .…”

Section: Figurementioning

confidence: 99%

Designing Eco‐Sustainable Dye‐Sensitized Solar Cells by the Use of a Menthol‐Based Hydrophobic Eutectic Solvent as an Effective Electrolyte Medium

Boldrini

Manfredi

Perna

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

The use of a hydrophobic eutectic solvent based on dl-menthol and a naturally occurring acid such as acetic acid has been tested as an eco-friendly electrolyte medium in dye-sensitized solar cells. In the presence of a de-aggregating agent and a representative hydrophobic organic photosensitizer, the corresponding devices displayed relatively good power conversion efficiencies in very thin active layers. In particular, the higher cell photovoltage detected in comparison to devices based on toxic and volatile organic compounds may stem from a more efficient interface interaction, as suggested by electrochemical impedance spectroscopy studies showing greater charge recombination resistance and electron lifetime.

show abstract

“…This is unlike previous metal extraction studies using carboxylate HES in which metal extraction was mainly due to the other component of the HES, namely lidocaine and a quaternary ammonium ionic liquid. 5,6 UV-vis analysis ( of the organic phase after extraction confirms that Cu(II) is extracted in the form of a Cu-capric acid complex with the presence of a large peak at 680 nm similar to that observed for Cu(acetate) 2 hydrate complexes. 11 Although pure capric acid, in the absence of diluent, displays a marginally greater extraction efficiency than the HES, it was discarded due to the surfactant qualities of pure unbranched carboxylic acids.…”

mentioning

confidence: 94%

“…9 HES were used for the recovery of indium and transition metals from chloride media. 5,6 Although promising, these results were limited by low extraction yields, a lack of selectivity between various transition metals and incomplete recycling of the HES. Sustainable HES composed of cheap naturally sourced terpenes (such as menthol and thymol) as hydrogen bond acceptor and fatty acids (from caprylic to stearic acids) as hydrogen bond donor were shown to be highly hydrophobic.…”

mentioning

confidence: 99%

“…3,4 For any solvent to be eligible for use in solvent extraction, it must possess low water solubility, low vapour pressure, simple synthesis, low cost, high selectivity towards the target solute, high solvent loading, low viscosity and low toxicity. In this context, hydrophobic eutectic solvents (HES) have emerged as promising designer solvents for the extraction of varied inorganic 5,6 and organic solutes. 7,8 These eutectic mixtures are usually composed of two constituents associated by hydrogen bonding and dispersion forces.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Sustainable hydrophobic terpene-based eutectic solvents for the extraction and separation of metals

et al. 2018

View full text Add to dashboard Cite

a Sustainable hydrophobic eutectic solvents, composed of low-priced and biodegradable terpenes and fatty acids, were used for the extraction and separation of Cu(II) from other transition metals in mildly acidic solutions. Multiple parameters were evaluated for metal extraction and the hydrophobic eutectic solvent was successfully recovered and reused.Metals represent an inherent source of both economic value and toxicity, with their consumption projected to increase in line with global economic standards. Furthermore, the starting compounds are biodegradable and approved for human consumption by various food and drug agencies, turning the resulting HES of interest for a wide range of industries. In this work, sustainable HES based on menthol or its aromatic counterpart thymol combined with long chain carboxylic acids (C n H (2n+1) OOH; n = 8, 10,12,14, 16, 18) (Fig. S1 in the ESI †), are evaluated for the extraction of Cu(II) and its separation from other transition metals, namely Co(II) and Ni(II). The solid-liquid phase diagrams of these HES were previously reported by us along with their physico-chemical properties at compositions close to the eutectic.10 These are summarised in

show abstract

Removal of alkali and transition metal ions from water with hydrophobic deep eutectic solvents

Cited by 213 publications

References 22 publications

Quest for Green‐Solvent Design: From Hydrophilic to Hydrophobic (Deep) Eutectic Solvents

Quest for Green‐Solvent Design: From Hydrophilic to Hydrophobic (Deep) Eutectic Solvents

Designing Eco‐Sustainable Dye‐Sensitized Solar Cells by the Use of a Menthol‐Based Hydrophobic Eutectic Solvent as an Effective Electrolyte Medium

Sustainable hydrophobic terpene-based eutectic solvents for the extraction and separation of metals

Contact Info

Product

Resources

About