Thermodynamic properties of aqueous ternary system CuSO4 + PEG 4000 + H2O at different temperatures

Cortés, Sonia; Claros, Martha; Jiménez, Yecid P.

doi:10.1016/j.molliq.2018.06.078

Cited by 10 publications

(4 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For all the ATPS investigated, an increase in the temperature led to an increase in the biphasic region, reflected by changes in the position of the binodal line (Figure ). Similar results have been reported for other ATPS formed by a macromolecule and an electrolyte, ,, in agreement with the work of Da Silva and Loh, where calorimetric measurements indicated that the phase separation process was endothermic.…”

Section: Resultssupporting

confidence: 91%

“…As expected, the ATPS with similar global compositions showed higher absolute STL values as the temperature was increased. As highlighted previously and reported elsewhere, ,,,,, the spontaneous transfer of water molecules from the macromolecule phase to the electrolyte phase is responsible for an increase in the absolute STL value. This occurs because, as the temperature increases, there is an increase in the macromolecule concentration in the MRP, concomitantly with a decrease in the electrolyte concentration in the ERP.…”

Section: Resultssupporting

confidence: 60%

“…The size of the biphasic region of an ABS formed by a macromolecule, an electrolyte, and H 2 O is typically influenced by temperature, mainly due to alteration of the thermodynamic properties of polymeric solutions …”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Liquid–Liquid Equilibrium Data of Macromolecule + Ammonium Thiosulfate + Water Ternary Systems at 283.2, 298.2, and 313.2 K

et al. 2021

View full text Add to dashboard Cite

Liquid−liquid equilibrium data were obtained for aqueous two-phase system (ATPS) composed of [poly(ethylene oxide) (PEO1500), poly(propylene oxide) (PPO425), poly(ethylene oxide) 11 −poly(propylene oxide) 17 −poly(ethylene oxide) 11 (L35), or poly(propylene oxide) 8 −poly(ethylene oxide) 22 −poly(propylene oxide) 8 (10R5)] + ammonium thiosulfate + water, at 283.2, 298.2, and 313.2 K. The consistencies of the all tie-line experimental compositions were improved by applying the Othmer− Tobias and Bancroft equations, resulting in linear correlation coefficients (R 2 ) ≥ 0.95. For all the ATPS, an increase in the temperature resulted in increases in the biphasic region and the tie-line slope, indicating that the phase separation process was entropically driven. Among the macromolecules studied, PPO425 produced the largest biphasic region, due to its greater hydrophobicity, followed by L35 ≈ 10R5 > PEO1500.

show abstract

Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 60%

See 1 more Smart Citation

Liquid–Liquid Equilibrium Data of Macromolecule + Ammonium Thiosulfate + Water Ternary Systems at 283.2, 298.2, and 313.2 K

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In an MD system, the selection of feed temperature directly influences the flux, because, generally, with increasing feed temperature, the flux increases. A feed temperature of 60 °C was selected based on the study of the waste heat situation for MD . It was also proved that the MD performance is optimal at this temperature .…”

Section: Results and Discussionmentioning

confidence: 99%

Recovery of Water from Concentration of Copper Mining Effluents Using Direct Contact Membrane Distillation

Jiménez

Ulbricht

2019

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

In the present work, the water recovery and concentration of H2SO4 and metals from a copper mining effluent by membrane distillation was studied. The performance of the direct contact membrane distillation was analyzed by estimating the water flux, the water recovery, and the concentration factor for acid and metals, taking into account the structural properties of the membrane, transport phenomena, and the most sensitive process parameters, with the objective to determine the feasibility of the process. The results show that, with increasing temperature gradient, the transmembrane flux improves, that the solution concentration has a negligible effect, and that there is a proportional relation between vapor pressure and flux. Considering a feed temperature of 60 °C and coolant inlet temperature of 20 °C, for the aqueous acid solutions formed by copper sulfate after 5 h, a concentration factor of 1.4 was obtained and, for the synthetic effluents, the concentration factor after 10 h was 1.65 (water recovery of 40%). Of all the membranes tested, a laminated polyvinylidene difluoride (PVDF) membrane with a nominal pore size of 0.2 μm had the best performance. A model that includes the Pitzer equation to determine the vapor pressure of the solutions was developed to analyze the experimental tests and predict the flux; the model reproduces the experimental data with a maximum deviation of 7%. The feasibility for separation of acid and copper from concentrated mining effluents (rich in copper) by membrane distillation was analyzed through a conceptual process design; this analysis determined that it is possible to recover acid and copper by solvent extraction after three stages of membrane distillation. The total cost estimated (0.739 $·m–3) proves that the process is competitive with other desalination methods.

show abstract

The effect of temperature on phase equilibria of polyethylene glycol (PEG8000)-K2SO4-H2O at T = (288.15, 298.15, 308.15) K

Chen

Zheng

et al. 2020

Chinese Journal of Chemical Engineering

View full text Add to dashboard Cite

Thermodynamic properties of aqueous ternary system CuSO4 + PEG 4000 + H2O at different temperatures

Cited by 10 publications

References 41 publications

Liquid–Liquid Equilibrium Data of Macromolecule + Ammonium Thiosulfate + Water Ternary Systems at 283.2, 298.2, and 313.2 K

Liquid–Liquid Equilibrium Data of Macromolecule + Ammonium Thiosulfate + Water Ternary Systems at 283.2, 298.2, and 313.2 K

Recovery of Water from Concentration of Copper Mining Effluents Using Direct Contact Membrane Distillation

The effect of temperature on phase equilibria of polyethylene glycol (PEG8000)-K2SO4-H2O at T = (288.15, 298.15, 308.15) K

Contact Info

Product

Resources

About

Thermodynamic properties of aqueous ternary system CuSO4 + PEG 4000 + H2O at different temperatures

Cited by 10 publications

References 41 publications

Liquid–Liquid Equilibrium Data of Macromolecule + Ammonium Thiosulfate + Water Ternary Systems at 283.2, 298.2, and 313.2 K

Liquid–Liquid Equilibrium Data of Macromolecule + Ammonium Thiosulfate + Water Ternary Systems at 283.2, 298.2, and 313.2 K

Recovery of Water from Concentration of Copper Mining Effluents Using Direct Contact Membrane Distillation

The effect of temperature on phase equilibria of polyethylene glycol (PEG8000)-K2SO4-H2O at T = (288.15, 298.15, 308.15) K

Contact Info

Product

Resources

About

Thermodynamic properties of aqueous ternary system CuSO4 + PEG 4000 + H2O at different temperatures

The effect of temperature on phase equilibria of polyethylene glycol (PEG8000)-K2SO4-H2O at T = (288.15, 298.15, 308.15) K