Extractive concentration of aqueous salt solutions in aqueous two phase systems

Milošević, Maja M.; Staal, K.J.J.; Schuur, Boelo; Haan, de Ab André

doi:10.1016/j.desal.2013.06.008

Cited by 10 publications

(14 citation statements)

References 39 publications

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“…This facilitates the transfer of carboxylic acid molecules into the organic solvent phase, and minimizes solvent leaching (Pratiwi et al, 2015). This practice is known in the literature as "salting out" (Milosevic et al, 2014(Milosevic et al, , 2013. It should be noted that the added electrolyte must not interact with carboxylic acids in such a way that their molecular (undissociated) forms are disturbed.…”

Section: Enhancing Extraction With Salting Outmentioning

confidence: 99%

Liquid–liquid extraction-based process concepts for recovery of carboxylic acids from aqueous streams evaluated for dilute streams

Reyhanitash

Brouwer

Kersten

et al. 2018

Chemical Engineering Research and Design

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Section: Enhancing Extraction With Salting Outmentioning

confidence: 99%

Liquid–liquid extraction-based process concepts for recovery of carboxylic acids from aqueous streams evaluated for dilute streams

Reyhanitash

Brouwer

Kersten

et al. 2018

Chemical Engineering Research and Design

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“…Classical aqueous biphasic systems have already been investigated as extraction/concentration techniques. 27,28…”

Section: Introductionmentioning

confidence: 99%

“…Classical aqueous biphasic systems have already been investigated as extraction/concentration techniques. 27,28 In addition to the more conventional polymer-based systems, in 2003, Gutowski et al 29 demonstrated that hydro-philic ionic liquids (ILs) can also form aqueous biphasic systems by the addition of inorganic salts. After this proof of principle, in the following years it was shown that IL-based aqueous biphasic systems can be formed with organic salts, amino acids, carbohydrates or polymers.…”

Section: Introductionmentioning

confidence: 99%

One-step extraction and concentration of estrogens for an adequate monitoring of wastewater using ionic-liquid-based aqueous biphasic systems

et al. 2015

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Ethinylestradiol (EE2) is a synthetic hormone that has been recognized as one of the most prominent endocrine disruptors found in the aqueous environment. Nevertheless, the low content of EE2 in wastewater makes its identification/quantification unfeasible - a major drawback for the evaluation of its persistence and environmental impact. In this context, a novel extraction/concentration method for EE2 from wastewater is proposed here based on aqueous biphasic systems composed of ionic liquids (ILs). Aqueous biphasic systems formed by several hydrophilic ILs and KNaCHO were initially screened and optimized, with extraction efficiencies of EE2 for the IL-rich phase ranging between 92 and 100%. Remarkable results were obtained with systems that allow the complete extraction of EE2 in a single-step, and without loss of EE2 or the saturation of the extractive phase. Further, the concentration factors of EE2 attainable with these systems were investigated by a suitable manipulation of the composition of the phase-forming components and the corresponding volumes of the coexisting phases. An outstanding concentration of EE2 up to 1000-fold (from ng L to μg L) in a single extraction and concentration step was achieved for the first time with IL-based aqueous biphasic systems. These systems are straightforwardly envisaged for the monitoring of wastewater as one-step extraction and concentration routes for a wide array of endocrine disrupting chemicals while allowing an adequate evaluation of their environmental impact.

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“…The tube was then placed in a thermotank (DHG-9031A, Shanghai Jinghong Laboratory Instrument Co. Ltd.) at (298 ± 0.1) K for 15 h to achieve thorough dissolution equilibrium. Afterward, the tube was centrifuged for 5 to determine the concentration of naphthalene in the top phase. Each solubility experiment was repeated three times.…”

Section: Determination Of Peg In the Atpsmentioning

confidence: 99%

Solubility of Naphthalene in the Top Phase of Polyethylene Glycol and Ammonium Sulfate Aqueous Two-Phase Systems

Liu

Zhu

et al. 2023

J. Chem. Eng. Data

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In this study, the solubility of naphthalene was used to demonstrate the dissolubility of three top aqueous two-phase systems (ATPSs) comprising polyethylene glycol (PEG) 1000, PEG 1500, and PEG 2000, respectively, mixed with ammonium sulfate (NH 4 ) 2 SO 4 . First, the liquid−liquid equilibrium data were obtained for the three individual ATPSs. Under the condition of 1 mg naphthalene in a 1 mL individual top phase of the ATPSs at 298 K, the measured dissolubilities with compositions of 20 wt % ammonium sulfate and 20 wt % PEG 1000, 1500, and 2000 against naphthalene were 4.19, 4.80, and 5.04 mmol•L −1 , respectively. It was demonstrated that the dissolubility of naphthalene in the top phase of ATPS positively correlates with the contents of PEG, salt, and both (PEG and salt), with average correlation coefficients of 0.9817, 0.9978, and 0.9588, respectively. The dissolubilities of the top phases of the three ATPSs against naphthalene were compared and revealed to be within 98−163% of those of 13 selected common solvents, indicating that their performance can be further fine-tuned. The results obtained in this study highlight characteristics of the ATPSs that render them suitable for use as solvents, in addition to their well-known use as separation candidates.

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Extractive concentration of aqueous salt solutions in aqueous two phase systems

Cited by 10 publications

References 39 publications

Liquid–liquid extraction-based process concepts for recovery of carboxylic acids from aqueous streams evaluated for dilute streams

Liquid–liquid extraction-based process concepts for recovery of carboxylic acids from aqueous streams evaluated for dilute streams

One-step extraction and concentration of estrogens for an adequate monitoring of wastewater using ionic-liquid-based aqueous biphasic systems

Solubility of Naphthalene in the Top Phase of Polyethylene Glycol and Ammonium Sulfate Aqueous Two-Phase Systems

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