Investigation of 1-(2-carboxyethyl)-3-methylimidazolium chloride[HOOCEMIM][Cl] ionic liquid effect on water activity and solubility of l-serine at T = 298.15 K |
| |
| Institution: | 1. Physical Chemistry Department, University of Tabriz, Tabriz, Iran;2. Department of Organic and Bioorganic Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 51664, Iran;1. Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, HR-10000 Zagreb, Croatia;2. NMR Centre, RuĿer BoškoviĿ Institute, BijeniĿka cesta 54, HR-10000 Zagreb, Croatia;1. Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Torino, Italy;2. Centre for Sustainable Future Technologies CSFT@PoliTo Istituto Italiano di Tecnologia, Via Livorno, 60, 10144, Torino, Italy;3. Department of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via G. Quarello 15, 10135 and Via P. Giuria 7, 10125, Torino, Italy;1. CICECO – Aveiro Departamento de Química, Universidade de Aveiro, 3810-193, Aveiro, Portugal;2. Associate Laboratory LSRE/LCM, Departamento de Tecnologia Química e Biológica, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5301-857, Bragança, Portugal |
| |
| Abstract: | Water activity measurements by the isopiestic method have been carried out on the aqueous ternary system of {l-serine + 1-(2-carboxyethyl)-3-methylimidazolium chlorideHOOCEMIM]Cl]} ionic liquid and the aqueous binary system of IL at T = 298.15 K and atmospheric pressure. The data obtained were used to calculate the vapor pressure and osmotic coefficient of solution as a function of concentration. The experimental results for the activity of water were accurately correlated with segment-based local composition models of modified NRTL and UNIQUAC. The fitting quality of the above models has been favorably compared with the NRTL and Wilson models. From these data, the corresponding activity coefficients have been calculated. For the same system, the solubility of the l-serine at various HOOCEMIM]Cl] ionic liquid concentrations was measured at T = 298.15 K using the gravimetric method. A chemical model was employed to describe the dissociation equilibria of all amino acid species with hydrogen ions in water. Moreover, for l-serine, the chemical model indicated that the formation of cations is insignificant in the HOOCEMIM]Cl] solution. Also the above local composition models were used to predict the solubility of l-serine in aqueous IL solutions. To provide information regarding (solute + solute) interactions, transfer Gibbs free energies (ΔGtr) of amino acid from water to aqueous IL solutions have been determined. |
| |
| Keywords: | [HOOCEMIM][Cl] Osmotic coefficient UNIQUAC Solubility Transfer Gibbs free energies |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
