Screening ionic liquids for efficiently extracting perfluoroalkyl chemicals (PFACs) from wastewater

Zhang, Kaihang; Kujawski, David; Spurrell, Chris; Wang, Bing; Crittenden, John C.

doi:10.1016/j.jes.2022.08.025

Cited by 9 publications

(4 citation statements)

References 45 publications

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“…Ionic liquid (IL) as a "green chemical" solvent is replacing the toxic, combustible and volatile organic solvents of traditional LLE [40,41]. Owing to its advantages such as simple operation, rapidity, high enrichment efficiency, and diminished use of extraction agent, ionic liquid-dispersive liquid-liquid microextraction (IL-DLLME) is applicable for combined use with instrumental methods covering gas chromatography and liquid chromatography [42].…”

Section: Liquid Phase Microextractionmentioning

confidence: 99%

Advancements in Preprocessing and Analysis of Nitrite and Nitrate since 2010 in Biological Samples: A Review

Liu,

Guo,

Zhao

et al. 2023

Molecules

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As a substance present in organisms, nitrite is a metabolite of nitric oxide and can also be ingested. Nitrate is the metabolite of nitrite. Therefore, it is necessary to measure it quickly, easily and accurately to evaluate the health status of humans. Although there have been several reviews on analytical methods for non-biological samples, there have been no reviews focused on both sample preparation and analytical methods for biological samples. First, rapid and accurate nitrite measurement has significant effects on human health. Second, the detection of nitrite in biological samples is problematic due to its very low concentration and matrix interferences. Therefore, the pretreatment plus measuring methods for nitrite and nitrate obtained from biological samples since 2010 are summarized in the present review, and their prospects for the future are proposed. The treatment methods include liquid–liquid microextraction, various derivatization reactions, liquid–liquid extraction, protein precipitation, solid phase extraction, and cloud point extraction. Analytical methods include spectroscopic methods, paper-based analytical devices, ion chromatography, liquid chromatography, gas chromatography–mass spectrometry, electrochemical methods, liquid chromatography–mass spectrometry and capillary electrophoresis. Derivatization reagents with rapid quantitative reactions and advanced extraction methods with high enrichment efficiency are also included. Nitrate and nitrate should be determined at the same time by the same analytical method. In addition, much exploration has been performed on formulating fast testing through microfluidic technology. In this review, the newest developments in nitrite and nitrate processing are a focus in addition to novel techniques employed in such analyses.

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Section: Liquid Phase Microextractionmentioning

confidence: 99%

Advancements in Preprocessing and Analysis of Nitrite and Nitrate since 2010 in Biological Samples: A Review

Liu,

Guo,

Zhao

et al. 2023

Molecules

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“…The non-fluorinated [P 66614 ][Piv] -pivalate anion being named by IUPAC 2,2-dimethylpropanoate -was proved to be the best ionic liquid when only mixed with PFOA-containing wastewater. 32 COSMO models were also used to calculate the infinite dilution activity coefficient lnγ ∞ of PFOA in water + ILs mixtures 32,33 and to predict the most promising solvents, showing that the anion plays the most important role in PFOA extraction 32 by the presence of a H-bond acceptor. 33 In the present work, we want to provide an understanding of the interactions between ionic liquids and fluorinated precursors of textile water-repellents, namely perfluorobutyric acid (PFBA) and 6:2 fluorotelomer alcohol (6:2 FTOH).…”

Section: Introductionmentioning

confidence: 99%

“…32 COSMO models were also used to calculate the infinite dilution activity coefficient lnγ ∞ of PFOA in water + ILs mixtures 32,33 and to predict the most promising solvents, showing that the anion plays the most important role in PFOA extraction 32 by the presence of a H-bond acceptor. 33 In the present work, we want to provide an understanding of the interactions between ionic liquids and fluorinated precursors of textile water-repellents, namely perfluorobutyric acid (PFBA) and 6:2 fluorotelomer alcohol (6:2 FTOH). Because numerous combinations of cations and anions are possible when preparing ionic liquids, a previous in silico screening is an interesting approach.…”

Section: Introductionmentioning

confidence: 99%

“…Although COSMO-RS and COSMO-SAC variants have been already used for the prediction of gas solubility in ionic liquids, 34 phase behavior of ILs 35,36 or the solubility of organic solutes, [37][38][39] a few publications so far has used this screening tool to assess the affinity of PFAS in pure ionic solvents. 32,33 We designed ionic liquids to have favourable interactions with PFBA and 6:2 FTOH on the basis of a two-step strategy: first, by in silico screening of a large number of salts using the COSMO-SAC method with the calculation of infinite dilution activity coefficients of the chosen PFAS in ionic liquids; and second, studying experimentally some ILs, through the direct quantification of their interactions of the chosen PFAS, namely the measurement of mixing enthalpies with isothermal titration calorimetry.…”

Section: Introductionmentioning

confidence: 99%

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Mixing enthalpies of fluorinated precursors for textile industry in ionic liquids

Simon,

Avila,

Padua

et al. 2024

Preprint

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Per- and polyfluoroalkyl substances (PFAS) are widely used for technical purposes in textile finishing, giving water or oil repellence to the fibres. During their production, textile manufacturing or consumer-use, these additives can be degraded into their precursors and released in the environment. These substances are volatile, bio accumulative and persistent, and their release in the environment is more and more regulated in the EU . For a textile recycling purpose, it is necessary to find ways to safely remove them from the fibres. Among other alternative solvents, ionic liquids showed solvation properties that are promising for recycling textile waste. We have used the COSMO-SAC modelling approach to screen a large number of ionic liquids and, by the calculation of infinite dilution activity coefficients, find the most appropriate solvents for two representative fluorinated precursors likely to be found in textile products. We could determine which ionic liquids were able to interact favourably with perfluorobutyric acid (PFBA) and 6:2 fluorotelomer alcohol (6:2 FTOH). These information could be quantified using isothermal titration calorimetry (ITC) for PFBA in 1-butyl-3-metylimidazolium bis(trifluoromethylsulfonyl)imide, [C4C1Im][NTf2], predicted by COSMO-SAC as a weak solvent, as well as in 1-ethyl-3 methylimidazolium methylsulfonate, [C2C1Im][MeSO3] and 1-butyl-3-methylimidazolium acetate, [C4C1Im][OAc], expected to have strong interactions with the textile additive. Mixing enthalpies of 6:2 FTOH were measured in selected ionic liquids, namely triethylammonium methylsulfonate, [N222H][MeSO3], 1-ethyl-3 methylimidazolium methylsulfonate, [C2C1Im][MeSO3] and acetate, [C2C1Im][OAc]. A proton transfer from PFBA to AcO– (and to a lesser extent from 6:2 FTOH to AcO–) was investigated and described with DFT calculations, 1H NMR analysis and FT-IR spectroscopy.

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Dynamic monitoring of eco-environmental quality in the Greater Mekong Subregion: Evolutionary characteristics and country differences

Liu,

Li,

et al. 2025

Environmental Impact Assessment Review

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Screening ionic liquids for efficiently extracting perfluoroalkyl chemicals (PFACs) from wastewater

Cited by 9 publications

References 45 publications

Advancements in Preprocessing and Analysis of Nitrite and Nitrate since 2010 in Biological Samples: A Review

Advancements in Preprocessing and Analysis of Nitrite and Nitrate since 2010 in Biological Samples: A Review

Mixing enthalpies of fluorinated precursors for textile industry in ionic liquids

Dynamic monitoring of eco-environmental quality in the Greater Mekong Subregion: Evolutionary characteristics and country differences

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