Solubility Modeling of the Binary Systems Fe(NO3)3–H2O, Co(NO3)2–H2O and the Ternary System Fe(NO3)3–Co(NO3)2–H2O with the Extended Universal Quasichemical (UNIQUAC) Model

Mouad Arrad, Mohammed Kaddami, Bahija El Goundali, Kaj Thomsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Solubility modeling in the binary system Fe(NO3)3–H2O, Co(NO3)2–H2O and the ternary system Fe(NO3)3–Co(NO3)2–H2O is presented. The extended UNIQUAC model was applied to the thermodynamic assessment of the investigated systems. The model parameters obtained were regressed simultaneously using the available databank but with more experimental points, recently published in the open literature. A revision of previously published parameters for the cobalt ion and new parameters for the iron(III) nitrate system are presented. Based on this set of parameters, the equilibrium constants of hydrates are determined. The model represents the experimental data with good accuracy from the freezing point region to the boiling points of the solutions.
Original languageEnglish
JournalJournal of Solution Chemistry
Volume45
Issue number4
Pages (from-to)534-545
ISSN0095-9782
DOIs
Publication statusPublished - 2016

Keywords

  • Electrolyte
  • Extended UNIQUAC
  • Metal nitrate
  • Modeling
  • Solubility

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