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Solubility Modeling of the Systems Ni(NO3)2–H2O and Fe(NO3)3–Ni(NO3)2–H2O with the Extended Universal Quasichemical (UNIQUAC) Model

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Abstract

Thermodynamic modeling of the binary systems Ni(NO3)2–H2O and Ni(NO3)2–H2O and of the ternary system of Fe(NO3)3–Ni(NO3)2–H2O along the 30 °C isotherm are presented. The extended UNIQUAC model was applied for the thermodynamic assessment of the investigated systems, the model parameters were regressed simultaneously using the available databank but with additional experimental data recently published in the open literature. A revision for previously published parameters for the nickel ion, new parameters for the iron(III) nitrate system, and interaction parameters for the Ni2+–Fe3+ interaction are presented. Based on this set of parameters, the equilibrium constants of hydrates were determined. The model represents the experimental data with good accuracy from the freezing point region to the boiling points of the solutions.

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Abbreviations

A :

Debye–Hückel parameter (kg1/2·mol−1/2)

K :

Equilibrium constant

a :

Activity

A, B, C, D and E :

Parameters of Eq. 12

aq:

Aqueous

B :

Debye–Hückel parameter (kg1/2·mol−1/2)

I :

Ionic strength based on molality

m :

Molality (mol·kg−1 H2O)

p :

Pressure (kPa)

q :

Surface area

R :

Gas constant (J·mol−1·K−1)

r :

Volume parameter

T :

Temperature (K)

u, u 0, u T :

UNIQUAC interaction parameters

x :

Mole fraction

M w :

Molecular weight of water (kg·mol−1)

n :

Mole number

γ :

Activity coefficient

∞:

Infinite dilution

0:

Standard state

*:

Asymmetrical

E:

Excess

I:

Index

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Authors and Affiliations

  1. Laboratory “Physical Chemistry of Processes and Materials”, Faculty of Science and Technology, University Hassan 1, Settat, Morocco

    Mouad Arrad, Mohammed Kaddami & Bahija El Goundali

  2. Department of Process Engineering, National School of Mines of Rabat, BP 753 Agdal, Rabat, Morocco

    Mouad Arrad

  3. Department of Chemical and Biochemical Engineering, CERE, Technical University of Denmark, 2800, Kgs, Lyngby, Denmark

    Kaj Thomsen

Authors
  1. Mouad Arrad
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  2. Mohammed Kaddami
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  3. Bahija El Goundali
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  4. Kaj Thomsen
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Correspondence to Mouad Arrad.

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Arrad, M., Kaddami, M., El Goundali, B. et al. Solubility Modeling of the Systems Ni(NO3)2–H2O and Fe(NO3)3–Ni(NO3)2–H2O with the Extended Universal Quasichemical (UNIQUAC) Model. J Solution Chem 46, 1220–1229 (2017). https://doi.org/10.1007/s10953-017-0639-2

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  • DOI: https://doi.org/10.1007/s10953-017-0639-2

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