Supported imidazolium ionic liquid phases: A new material for solid-phase extraction

Fontanals, Núria; Ronka, Sylwia; Borrull, Francesc; Trochimczuk, Andrzej W.; Marcé, Rosa María

doi:10.1016/j.talanta.2009.06.068

Cited by 84 publications

(64 citation statements)

References 29 publications

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“…The latest developments in SILP systems can be divided in two great blocks as catalysis (Riisager et al 2003(Riisager et al , 2005b(Riisager et al , 2006a(Riisager et al , 2006bVirtanen et al 2007Virtanen et al , 2009aVirtanen et al , 2009bRuta et al 2008) and separation processes (Zhang et al 2009a;Vioux et al 2010;Sun et al 2009;Fontanals et al 2009;Fang et al 2010;Kohler et al 2010;Werner et al 2010;Joni et al 2010). In catalytic processes, a variety of reactions have been studied where SILP proved to be more active and selective than common systems.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Supported Ionic Liquid Phase (SILP) materials prepared from different supports

et al. 2011

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Supported ionic liquid phase (SILP) materials are a recent concept where a film of ionic liquid (IL) is immobilized on a solid phase, combining the advantages of ILs (non volatility, high solvent capacity, etc.) with those of heterogeneous support materials. In this work, new SILP materials were prepared using a series of supports with different porosity and chemical nature. An imidazolium-based IL, 1-methyl-3-octylimidazolium hexafluorophosphate (OmimPF 6 ), was confined at variable contents (5-60% w/w) in three different activated carbons (ACs), silica (SiO 2 ), alumina (Al 2 O 3 ) and titania (TiO 2 ).For the first time, a systematic characterization of different SILP systems has been carried out applying a variety of analytical and spectroscopic techniques to provide information of interest on these materials. Elemental analysis (EA), adsorption-desorption isotherms of N 2 at 77 K, mercury porosimetry, termogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electronic microscopy (SEM) and energy dispersive X-ray (EDX) were conducted to explore confinement effects. The results demonstrate that EA is a useful tool for quantifying the amount of imidazolium-based IL incorporated on support, independently of the nature of the solid. An excellent correlation has been obtained between the percentage of elemental nitrogen and the IL loaded on the support. The combination of nitrogen adsorption-desorption isotherms at 77 K and mercury porosimetry measurements was used to characterize the pore structure of both supports and SILP materials. It was found that depending on the available pores in the solid support, the IL tends to fill micropores firstly, then mesopores and lately in macropores. Thermal properties of SILP materials were studied herein by using both TGA and DSC methods, evidencing that the stability of SILP materials and the decomposition mechanism are strongly dependent on the surface chemistry of the solid support. SEM and EDX provided evidences of external surface coverage by ILs and filling of macropores at high IL load.

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Section: Introductionmentioning

confidence: 99%

Characterization of Supported Ionic Liquid Phase (SILP) materials prepared from different supports

et al. 2011

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“…The properties of the ILs can significantly change by varying the length of the alkyl groups that are incorporated into the cation and the types of anions. ILs are widely considered as alternatives to classical organic solvents and as such have been applied in many fields such as organic synthesis, electrochemistry, liquid phase extraction, catalysis for clean technology and polymerization processes [46][47][48][49][50]. Accordingly, their applications in separation technology have attracted great attention.…”

Section: Commonly Used Cationsmentioning

confidence: 99%

Ionic liquids in supported liquid membrane technology

Malik

Hashim

Nabi

2011

Chemical Engineering Journal

167

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“…Some properties, such as the thermal stability and miscibility, mainly depend on the anion, while others, such as the viscosity, surface tension and density, depend on the length of the alkyl chain in the cation and/or shape or symmetry [17] . These characteristics make these reagents suitable for a broad spectrum of uses such as catalytic reactions, organic synthesis, polymer chemistry, fungicides and electrochemical applications [18][19][20][21][22] ; recently, they had been proposed as extractants in solvent extraction and ionic exchange technologies, in order to extract metals from metal-bearing wastewaters [23][24][25][26] .…”

Section: Carriers In Organic Phases and Ionic Liquidsmentioning

confidence: 99%

Supported liquid membranes technologies in metals removal from liquid effluents

Agreda¹,

García‐Díaz²,

López³

et al. 2011

REVMETAL

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The generation of liquid effluents containing organic and inorganic residues from industries present a potential hazardousness for environment and human health, being mandatory the elimination of these pollutants from the respective solutions containing them. In order to achieve this goal, several techniques are being used and among them, supported liquid membranes technologies are showing their potential for their application in the removal of metals contained in liquid effluents. Supported liquid membranes are a combination between conventional polymeric membranes and solvent extraction. Several configurations are used: flat-sheet supported liquid membranes, spiral wounds and hollow fiber modules. In order to improve their effectiveness, smart operations have been developed: non-dispersive solvent extraction, non-dispersive solvent extraction with strip phase dispersion and hollow fiber renewal liquid membrane. This paper overviewed some of these supported liquid membranes technologies and their applications to the treatment of metal-bearing liquid effluents. KeywordsSupported liquid membranes; Metals; Extractants; Ionic liquids; liquid effluents; Environment. Tecnologías de membranas líquidas soportadas en la eliminación de metales de efluentes líquidos ResumenLa generación, por parte de las industrias, de efluentes líquidos conteniendo sustancias orgánicas e inorgánicas, es un peligro potencial tanto para los humanos como para el medio ambiente, siendo necesaria la eliminación de estos elementos tóxicos de las disoluciones que los contienen. Para conseguir este fin, se están aplicando diversas técni-cas y entre ellas las tecnologías de membranas líquidas soportadas, están demostrando sus aptitudes para la eliminación de metales contenidos en efluentes líquidos. Las membranas líquidas soportadas, resultan de la unión de las membranas poliméricas y de la tecnología de extracción líquido-líquido. Este tipo de membranas se pueden utilizar en diversas configuraciones: plana, módulo en fibra hueca y módulo en espiral y para aumentar su efectividad se están desarrollando las llamadas operaciones avanzadas: extracción no dispersiva, extracción no dispersiva con dispersión de la fase de reextracción y empleo del módulo de fibra hueca, con renovación de la membrana líquida. En este trabajo se revisan estas operaciones de membranas líquidas soportadas y algunas de las aplicaciones de las mismas, en el tratamiento de efluentes líquidos conteniendo metales. Palabras claveMembranas líquidas soportadas; Metales; Agentes de extracción; Líquidos iónicos; Efluentes líquidos; Medio ambiente.

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Supported imidazolium ionic liquid phases: A new material for solid-phase extraction

Cited by 84 publications

References 29 publications

Characterization of Supported Ionic Liquid Phase (SILP) materials prepared from different supports

Characterization of Supported Ionic Liquid Phase (SILP) materials prepared from different supports

Ionic liquids in supported liquid membrane technology

Supported liquid membranes technologies in metals removal from liquid effluents

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