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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Macedo, Ea
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Publications (8/8 displayed)
- 2024Liquid-Liquid Equilibria Determination and Modeling of ATPS Based on PEG4000 and PVP29000 at 298.15 K and 0.1 MPacitations
- 2012(Liquid plus liquid) equilibria of polymer-salt aqueous two-phase systems for laccase partitioning: UCON 50-HB-5100 with potassium citrate and (sodium or potassium) formate at 23 degrees Ccitations
- 2010Liquid-Liquid Equilibria of UCON plus (Sodium or Potassium) Phosphate Salt Aqueous Two-Phase Systems at 23 degrees Ccitations
- 2008Correlations between distribution coefficients of various biomolecules in different polymer/polymer aqueous two-phase systemscitations
- 2008"On the Collander equation": Protein partitioning in polymer/polymer aqueous two-phase systemscitations
- 2008Delta G(CH2) as solvent descriptor in polymer/polymer aqueous two-phase systemscitations
- 2008Delta G(CH2) in PEG-salt and Ucon-salt aqueous two-phase systemscitations
- 2004Representation of liquid-liquid equilibria for polymer-salt aqueous two-phase systemscitations
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document
Liquid-Liquid Equilibria Determination and Modeling of ATPS Based on PEG4000 and PVP29000 at 298.15 K and 0.1 MPa
Abstract
Additionally to the known nontoxicity and eco-friendliness of aqueous two-phase systems (ATPS), polymeric ATPS, which are composed of at least one polymer [e.g., poly(ethylene glycol) or poly(vinylpyrrolidone)], provide extractive media with enhanced potential for drug delivery and biomolecule extraction. Nevertheless, the lack of liquid-liquid equilibria (LLE) data concerning these systems still limits their large-scale application and hampers proper thermodynamic modeling, delaying advancements in the design of novel materials and processes based on polymers. In this work, the LLE, i.e., solubility curves and tie-line compositions, of the ATPS {PEG4000 (1) + NaFormate (2) + Water (3)} and {PVP29000 (1) + NaFormate or Na(2)Tartrate or K(2)Tartrate (2) + Water (3)} were determined at 298.15 K and 0.1 MPa. The estimation of tie-line composition using third-degree polynomials of liquid density (rho) and electrical conductivity (kappa) allowed to better understand the influence of composition on these thermophysical properties, and the tie-line data were successfully correlated using the models of Othmer-Tobias and Bancroft-Hubard, achieving determination coefficients (R-2) larger than 0.9575 and 0.9676, respectively. Moreover, the obtained compositions were effectively described using the UNIversal QUAsi-Chemical (UNIQUAC) model, with standard deviations (sigma) lower than 6.84 x 10(-3).