Publication detail

Water activities of ternaty mixtures of poly(ethylene glycol), Fe2(SO4)3 and water ocer the temperature range of 303.15 to 333.15 K

CLAROS VARGAS, M. JIMENEZ Y.P.. CORTES, S.

Original Title

Water activities of ternaty mixtures of poly(ethylene glycol), Fe2(SO4)3 and water ocer the temperature range of 303.15 to 333.15 K

Type

journal article in Web of Science

Language

English

Original Abstract

The thermodynamic behavior of aqueous solutions containing the solutes ferric sulfate and poly(ethylene glycol) with an average molecular weight of 4000 (PEG 4000) was studied. These three compounds are vital components for forming the aqueous two-phase system. Consecuently, the water activity of the ternary system at 303.15, 313.15, 323.15 and 333.15K were determined, using vapor pressure osmometry. The concentratio of PEG was fixed to 0.05,0.1,0.15 and 0.2 mass fraction whereas the salt concentration was fixed to 0.05, 0.075, 0.1, 0.125, 0.15, 0.175 and 0.2 mass fraction. Additionally, the water activities of the constituent binary system (Fe2(SO)3+H2O) were measured in the same temperature range for different salt concentratiosn. The results show that ferric sulfate has a significatn effect on the wter activity in the salt-PEG-water system. From these measurements, values of the vapor pressure of solutions were determined. Finally, the experimetnal data were corraleted with the UNIQUAC model, obtaining a good agreement between experimental and correlated data.

Keywords

Water activity; Poly(ethylene glycol); ferric sulfate; aqueous-two phase system

Authors

CLAROS VARGAS, M.; JIMENEZ Y.P..; CORTES, S.

Released

15. 6. 2019

Publisher

Journal of Molecular Liquids

Location

Netherlands

ISBN

0167-7322

Periodical

JOURNAL OF MOLECULAR LIQUIDS

Year of study

284

Number

01677322

State

Kingdom of the Netherlands

Pages from

45

Pages to

52

Pages count

8

URL

http://sciencedirect.com/science/article/pii/S0167732218364729

BibTex

@article{BUT160571,
  author="CLAROS VARGAS, M. and JIMENEZ Y.P.. and CORTES, S.",
  title="Water activities of ternaty mixtures of poly(ethylene glycol), Fe2(SO4)3 and water ocer the temperature range of 303.15 to 333.15 K",
  journal="JOURNAL OF MOLECULAR LIQUIDS",
  year="2019",
  volume="284",
  number="01677322",
  pages="45--52",
  doi="10.1016/j.molliq.2019.03.110",
  issn="0167-7322",
  url="http://sciencedirect.com/science/article/pii/S0167732218364729"
}