Liquid-liquid extraction of phenolic compounds from water using ionic liquids: Literature review and new experimental data using [C2mim]FSI

Sas, Olalla G.; Domínguez, Irene; González, Begoña; Domínguez, Ángeles

doi:10.1016/j.jenvman.2018.09.042

Cited by 90 publications

(45 citation statements)

References 41 publications

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“…In addition to membranes, other potential applications of IL/water mixtures include use as solvents for chemical extraction, separation and catalysis [16,24,26,34,35], solvents for biomolecules and protein stabilizers [36][37][38][39][40], tunable solvents for biocatalysis [41][42][43][44] and solvents for tailoring coordination chemistry and exchange rates of lanthanides [45,46]. In all of these applications, it is essential to develop a fundamental understanding of how different ILs alter water nanostructure at various ion/water concentrations.…”

Section: Introductionmentioning

confidence: 99%

Tuning Water Networks via Ionic Liquid/Water Mixtures

Verma

Stoppelman

McDaniel

2020

IJMS

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Water in nanoconfinement is ubiquitous in biological systems and membrane materials, with altered properties that significantly influence the surrounding system. In this work, we show how ionic liquid (IL)/water mixtures can be tuned to create water environments that resemble nanoconfined systems. We utilize molecular dynamics simulations employing ab initio force fields to extensively characterize the water structure within five different IL/water mixtures: [BMIM + ][BF 4 − ], [BMIM + ][PF 6 − ], [BMIM + ][OTf − ], [BMIM + ][NO 3 − ] and [BMIM + ][TFSI − ] ILs at varying water fraction. We characterize water clustering, hydrogen bonding, water orientation, pairwise correlation functions and percolation networks as a function of water content and IL type. The nature of the water nanostructure is significantly tuned by changing the hydrophobicity of the IL and sensitively depends on water content. In hydrophobic ILs such as [BMIM + ][PF 6 − ], significant water clustering leads to dynamic formation of water pockets that can appear similar to those formed within reverse micelles. Furthermore, rotational relaxation times of water molecules in supersaturated hydrophobic IL/water mixtures indicate the close-connection with nanoconfined systems, as they are quantitatively similar to water relaxation in previously characterized lyotropic liquid crystals. We expect that this physical insight will lead to better design principles for incorporation of ILs into membrane materials to tune water nanostructure.

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Section: Introductionmentioning

confidence: 99%

Tuning Water Networks via Ionic Liquid/Water Mixtures

Verma

Stoppelman

McDaniel

2020

IJMS

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“…More specifically, Equations (1) and (2) represent the water hammer equation of fluid. Equations (3) and (4) represent the extended beam equations of the pipeline axial moving and Equations (5)- (8) are the Timoshenko beam equations of the pipeline lateral moving.…”

Section: Governing Equationsmentioning

confidence: 99%

“…">IntroductionPipes conveying fluid are prevalent in many fields, including marine, civil engineering, nuclear power industries, petroleum, and water conservancy systems in daily life [1]. As an inherent phenomenon, fluid-structure interaction (FSI) always occurs in water conveyance pipelines [2][3][4]. Because of the existence of FSI, those pipes with few supports or thin walls show poor robustness, where the FSI of pipes is enhanced [5].…”

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confidence: 99%

Fluid-Structure Interaction Response of a Water Conveyance System with a Surge Chamber during Water Hammer

Guo

Zhou

et al. 2020

Water

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Fluid-structure interaction (FSI) is a frequent and unstable inherent phenomenon in water conveyance systems. Especially in a system with a surge chamber, valve closing and the subsequent water level oscillation in the surge chamber are the excitation source of the hydraulic transient process. Water-hammer-induced FSI has not been considered in preceding research, and the results without FSI justify further investigations. In this study, an FSI eight-equation model is presented to capture its influence. Both the elbow pipe and surge chamber are treated as boundary conditions, and solved using the finite volume method (FVM). After verifying the feasibility of using FVM to solve FSI, friction, Poisson, and junction couplings are discussed in detail to separately reveal the influence of a surge chamber, tow elbows, and a valve on FSI. Results indicated that the major mechanisms of coupling are junction coupling and Poisson coupling. The former occurs in the surge chamber and elbows. Meanwhile, a stronger pressure pulsation is produced at the valve, resulting in a more complex FSI response in the water conveyance system. Poisson coupling and junction coupling are the main factors contributing to a large amount of local transilience emerging on the dynamic pressure curves. Moreover, frictional coupling leads to the lower amplitudes of transilience. These results indicate that the transilience is induced by the water hammer-structure interaction and plays important roles in the orifice optimization in the surge chamber.Keywords: fluid-structure interaction; pipe flow; finite volume method; water hammer; transient flow IntroductionPipes conveying fluid are prevalent in many fields, including marine, civil engineering, nuclear power industries, petroleum, and water conservancy systems in daily life [1]. As an inherent phenomenon, fluid-structure interaction (FSI) always occurs in water conveyance pipelines [2][3][4]. Because of the existence of FSI, those pipes with few supports or thin walls show poor robustness, where the FSI of pipes is enhanced [5]. Therefore, the FSI responses must be considered when analyzing the characteristics of water conveyance systems [6]. The types of coupling that occur between the pipeline and fluid mainly include friction coupling, Poisson coupling, and junction coupling, among which the former two coupling take place throughout the whole pipeline. However, the last one only happens locally in pipes, including in elbows, branches, valves, boundaries, and variable cross sections [7], where the system coupling is much stronger [8]. Amongst these three coupling forms, friction coupling has the weakest response and shows changes in its magnitude over a long period [9]. Meanwhile, as the most important coupling form, junction coupling produces a pressure head larger Water 2020, 12, 1025 2 of 18 than the classical water hammer, and greatly depends on the robustness of the system [10]. Poisson coupling and friction coupling can greatly influence junction coupling, and, in turn, junction coupling ...

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“…A química verde tornou-se um dos principais focos na indústria, e surgiu como umas das principais aplicações em ciência e engenharia, na qual prioriza essencialmente a redução de uso de solventes e reagentes tóxicos. Por esse motivo, diversos pesquisadores ao longo do tempo têm focado suas pesquisas em solventes verdes sendo, os líquidos iônicos (LIs) considerados ecologicamente corretos no uso em processos químicos, reduzindo a exposição a vapores tóxicos e minimizando o desperdício de solventes (LAWAL et al,2019;SAS et al, 2018).…”

Section: Líquido Iônicounclassified

“…Porém, nos últimos anos ganharam maior atenção como solventes ecológicos devido a algumas propriedades como: elevada polaridade, alta solubilidade, baixa toxicidade, alta condutividade e, estabilidade térmica, miscibilidade em água e solventes orgânicos e, baixas pressões de vapor e combustibilidade (VERMA et al, LAWAL et al,2019;SAS et al,2018).…”

Section: Líquido Iônicounclassified

Produção de celulases por fungos associados a caules de mandioca e aplicação na hidrólise de cana tratado com líquido iônico

Vedia¹

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Studies related to the attainment of new sources of enzymes have increased significantly, especially works regarding the glycosidase production, such as cellulases, xylanases, among others. In this context, this work verified the cellulase production from fungi associated with cassava stems. It also analyzed the efficiency to apply enriched extracts to this class of enzymes in the hydrolysis of sugar cane bagasse treated with the sec-butylammonium acetate ionic liquid (IL). For this, the cellulase production by 14 fungi isolated from cassava stems was evaluated, verifying a higher production by two fungi: the Annulohypoxylon stygium fungus (CA14), which showed a concentration of fermentable sugars during the microcrystalline cellulose hydrolysis of 0.83 ± 0.01 mg.mL-1 and the Phanerochaetaceae sp. fungus (CA17), with a concentration of 0.46 ± 0.03 mg.mL-1. Afterwards, the influence of time in the growth of these fungi (CA14 and CA17) in a liquid medium was verified. It was possible to determine an ideal growth period of 13 days for CA14 (enzymatic activity of 0.212 ± 0.002 FPU.mL-1) and 14 days for CA17 (0.201 ± 0.002 FPU.mL-1). Having verified the highest cellulase production by CA14, the ideal growth pH was also evaluated for this fungus (pH 4, activity of 0.427 ± 0.003 FPU.mL-1). Following the determination of the ideal growth condition for the CA14 fungus, a new growth process was realized. The enzymatic extract obtained was applied to the hydrolysis process of the sugar cane bagasse treated with the sec-butylammonium acetate IL (the best ionic liquid when compared to others evaluatedimidazolium acetate, imidazolium lactate, and secbutylammonium lactate). Finally, a prepurification of the enzymatic extract was carried out using an ammonium sulphate precipitation with saturations of 25, 50, and 75 %. All fractions were analyzed regarding the hydrolysis of the sugar cane bagasse treated with the selected IL, verifying a higher cellulase concentration in the fraction obtained after 50 % of saturation (0.430 ± 0.002 FPU.mL-1).

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Liquid-liquid extraction of phenolic compounds from water using ionic liquids: Literature review and new experimental data using [C2mim]FSI

Cited by 90 publications

References 41 publications

Tuning Water Networks via Ionic Liquid/Water Mixtures

Tuning Water Networks via Ionic Liquid/Water Mixtures

Fluid-Structure Interaction Response of a Water Conveyance System with a Surge Chamber during Water Hammer

Produção de celulases por fungos associados a caules de mandioca e aplicação na hidrólise de cana tratado com líquido iônico

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