Composition and structural effects on the adsorption of ionic liquids onto activated carbon
Entidad
UAM. Departamento de Química Física AplicadaEditor
The Royal Society of ChemistryFecha de edición
2013-07-09Cita
10.1039/c3em00230f
Environmental Sciences: Processes and Impacts 15.9 (2013): 1752-1759
ISSN
2050-7887 (print); 2050-7895 (online)DOI
10.1039/c3em00230fFinanciado por
The authors are grateful to the Spanish “Ministerio de Ciencia e Innovación (MICINN)” and “Comunidad de Madrid” for financial support (projects CTQ2011-26758 and S2009/PPQ-1545). We are very grateful to “Centro de Computación Científica de la Universidad Autónoma de Madrid” for computational facilities. The authors also acknowledge FCT – Fundaçao para a Ciencia e a Tecnologia, through the projects Pest-C/CTM/LA0011/2011 and PTDC/AAC-AMB/119172/2010. Catarina M. S. S. Neves also acknowledges FCT for the doctoral grant SFRH/BD/70641/2010Proyecto
Comunidad de Madrid. S2009/PPQ-1545/LIQUORGPAS; Gobierno de España. CTQ2011-26758Versión del editor
http://dx.doi.org/10.1039/c3em00230fMaterias
Activated carbon; Ammonium derivative; Anion; Cation; Imidazole derivative; Ionic liquid; Phosphonium derivative; Piperidine derivative; Pyridinium derivative; Pyrrolidine derivative; Surface water; QuímicaDerechos
© 2013 The Royal Society of ChemistryResumen
The applications and variety of ionic liquids (ILs) have increased during the last few years, and their use at a large scale will require their removal/recovery from wastewater streams. Adsorption on activated carbons (ACs) has been recently proposed for this aim and this work presents a systematic analysis of the influence of the IL chemical structures (cation side chain, head group, anion type and the presence of functional groups) on their adsorption onto commercial AC from water solution. Here, the adsorption of 21 new ILs, which include imidazolium-, pyridinium-, pyrrolidinium-, piperidinium-, phosphonium- and ammonium-based cations and different hydrophobic and hydrophilic anions, has been experimentally measured. This contribution allows an expansion of the range of IL compounds studied in previous works, and permits a better understanding of the influence of the IL structures through the adsorption on AC. In addition, the COSMO-RS method was used to analyze the measured adsorption isotherms, allowing the understanding of the role of the cationic and anionic structures in the adsorption process, in terms of the different interactions between the IL compound and AC surface/water solvent. The results of this work provide new insights for the development of adsorption as an effective operation to remove/recover ILs with very different chemical nature from water solution
Lista de ficheros
Google Scholar:Lemus Torres, Jesús
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Freire, Mara G.
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Palomar Herrero, José Francisco
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Neves, Catarina M. S. S.
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Marques, Carlos F. C.
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Coutinho, João A. P.
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