Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    The aqueous ionic equilibrium and speciation of iron and nickel in sulphuric solutions

    Access Status
    Fulltext not available
    Authors
    Wang, K.
    Li, J.
    McDonald, R.
    Browner, R.
    Date
    2012
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Wang, Kai and Li, Jian and McDonald, Robbie and Browner, Richard. 2012. The aqueous ionic equilibrium and speciation of iron and nickel in sulphuric solutions, in Proceedings of the 26th International Mineral Processing Congress (IMPC), Sep 24-28 2012. New Delhi, India: IMME and IIM.
    Source Title
    26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth - Conference Proceedings
    Source Conference
    26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth; New Delhi; India; 24 September 2012 through 28 September 2012; Code 97654
    ISBN
    8190171437
    URI
    http://hdl.handle.net/20.500.11937/11727
    Collection
    • Curtin Research Publications
    Abstract

    This paper presents a theoretical investigation on the ionic equilibrium of Fe(III)-Ni(II)-H2SO4-H2O system. A non-ideal speciation model is developed to calculate the concentration distribution of iron and nickel species in a mixed ferric and nickel sulphate aqueous solution over the pH range from 0 to 4 and temperature from 25 to 100°C. A series of speciation diagrams for iron and nickel species is plotted with the effects of ionic strength and temperature on the equilibrium constants being taken into account. The ionic strength-dependent equilibrium constant is treated through a semi-empirical Vasil'eV equation, which is based on an extended Debye-Hückel theory. A Helgeson model is applied to extrapolate the equilibrium constant to elevated temperature. The ionic equilibrium reactions are described by a group of numerical equations containing the temperature and ionic strength-dependent equilibrium constants, which are solved by the Newton-Raphson method. The speciation model is also applied to estimate the hydrogen ion activities and corresponding pH values. The calculated pH values are in agreement with the experimentally measured pH, and are compared to literature data and pH values produced by the Visual MINTEQ® program (a computer code for the calculation of chemical equilibrium in natural aqueous system). This investigation provides a deep insight into the ionic equilibrium behavior of a mixed metal sulphate aqueous system which commonly occurs in hydrometallurgical processing.

    Related items

    Showing items related by title, author, creator and subject.

    • Impurity rejection in the nickel laterite leach system
      Wang, Kai (2012)
      Atmospheric leaching (AL) of low-grade nickel laterite ores can produce a pregnant leach solution (PLS) containing significant amounts of impurities such as trivalent iron, aluminium and chromium ions. Purification of PLS ...
    • Effect of iron corrosion on the fate of dosed copper to inhibit nitrification in chloraminated water distribution system
      Zhan, Weixi (2011)
      Nitrification has been acknowledged as one of the major barriers towards efficient chloramination in water supply distribution systems. Many water utilities employing monochloramine as the final disinfectant have been ...
    • The effect of stoichiometry on the thermal behaviour of synthetic iron-nickel sulfides
      Chamberlain, Anthony C. (1996)
      The effect of stoichiometry on the pyrolytic decomposition, oxidation and ignition behaviour of synthetic violarite and pentlandite has been established. These minerals, of general formula (Fe,Ni)(subscript)3S(subscript)4 ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.