Triton X surfactants to form aqueous biphasic systems: Experiment and correlation |
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| Affiliation: | 1. Colloidal, macromolecular and Green Chemistry Group (QUIVECOM), Chemistry Department, Av. PH Rolfs, s/n, Viçosa, MG, 36570-900, Brazil;2. Applied Molecular Thermodynamic Group (THERMA), Food Technology Department, Federal University of Viçosa, Av. PH Rolfs, s/n, Viçosa, MG, 36570-900, Brazil;1. Plant Protection College, Shenyang Agricultural University, 120 Dongling Road, Shenyang 110161, China;2. Liaoning Entry-Exit Inspection and Quarantine Bureau, Dalian 116001, Liaoning Province, China;1. Department of Chemical Engineering, University of Vigo, 36310 Vigo, Spain;2. Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. República, 2780-157 Oeiras, Portugal |
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| Abstract: | During the last years, the extraction of biomolecules and chemicals by means of Aqueous Biphasic Systems (ABS) has triggered a renewed interest, making it necessary to characterize fully the solubility data of this kind of system. In this study, two surfactants belonging to Triton X series (Triton X-100 and Triton X-102) are proposed as candidates to form ABS, by adding different potassium-based salts (K3PO4, K2HPO4, K2CO3, K2S2O3 and K2SO3) at T = 298.15 K. Several equations were used to fit the solubility data which were previously obtained by means of the cloud point method. The different phase forming capacities were analyzed in the light of the Hofmeister series, the Effective Excluded Volume (EEV) theory and the molar Gibbs free energy of hydration (ΔhydG). The Othmer–Tobias equation was proposed to correlate the tie-line data. |
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