• Login
    View Item 
    •   NWU-IR Home
    • Research Output
    • Faculty of Natural and Agricultural Sciences
    • View Item
    •   NWU-IR Home
    • Research Output
    • Faculty of Natural and Agricultural Sciences
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Nickel retention by goethite and hematite.

    Thumbnail
    Date
    2000
    Author
    Beukes, J.P.
    Giesekke, E.W.
    Elliott, W.
    Metadata
    Show full item record
    Abstract
    The association of nickel with goethite and hematite is of importance for various processes concerned with nickel extraction. The adsorption of Ni2+(aq) by goethite and hematite in aqueous solutions were investigated over the pH range of 3 to 9. Similar tendencies were exhibited by both minerals. Firstly, an increase in nickel adsorption as the pH increased from 3 to 8 was observed. This can probably be attributed to the fact that the positively charged nickel cations are repulsed less by the oxide surfaces at higher pH values. Secondly, a sharp decrease in adsorption at pH > 8, due to a strong increase in nickel precipitation, was observed. Experimentally, it was found that goethite and hematite samples from different sources differed in terms of their ability to adsorb nickel over a 24 hour period. Examination of the physical characteristics of the samples used suggested that the ability to adsorb nickel is determined by their surface areas. In order to asses the importance of nickel inclusion, relative to nickel adsorption, into the mineral lattice of the iron oxide minerals under consideration, synthetic goethite and hematite were synthesised in the presence Ni2+(aq). These experiments were, however, less successful, and further work needs to be done in this area.
    URI
    http://hdl.handle.net/10394/14813
    https://doi.org/10.1016/S0892-6875(00)00140-0
    https://www.sciencedirect.com/science/article/pii/S0892687500001400
    Collections
    • Faculty of Natural and Agricultural Sciences [4817]

    Copyright © North-West University
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Browse

    All of NWU-IR Communities & CollectionsBy Issue DateAuthorsTitlesSubjectsAdvisor/SupervisorThesis TypeThis CollectionBy Issue DateAuthorsTitlesSubjectsAdvisor/SupervisorThesis Type

    My Account

    LoginRegister

    Copyright © North-West University
    Contact Us | Send Feedback
    Theme by 
    Atmire NV