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

    Kinetic control of particle-mediated calcium carbonate crystallization

    Access Status
    Fulltext not available
    Authors
    Aziz, B.
    Gebauer, Denis
    Hedin, N.
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Aziz, B. and Gebauer, D. and Hedin, N. 2011. Kinetic control of particle-mediated calcium carbonate crystallization. CrystEngComm. 13 (14): pp. 4641-4645.
    Source Title
    CrystEngComm
    DOI
    10.1039/c1ce05142c
    ISSN
    1466-8033
    School
    Department of Chemistry
    URI
    http://hdl.handle.net/20.500.11937/52328
    Collection
    • Curtin Research Publications
    Abstract

    By changing the temperature, pH, stirring rate, or time for calcium carbonate crystallization, complex shapes of aggregated calcium carbonates formed. Such shapes have earlier been ascribed to specific interactions with specialized additives. Without polymeric additives, aggregates of vaterite transformed more rapidly into calcite aggregates under slow than under fast stirring. With an anionic polyelectrolyte added, vaterite was stabilized. Larger polycrystalline aggregates of vaterite formed under rapid than under slow stirring, indicative of a particle mediated growth of aggregates controlled by convective currents. The size of the underlying nanoparticles was temperature dependent, with grain sizes of ~20 to 50 nm at 20 °C and ~350 nm at 90 °C. The small differences in free energy between the anhydrous polymorphs of calcium carbonate made both kinetic and equilibrium dependencies important. © The Royal Society of Chemistry 2011.

    Related items

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

    • The mechanism of Bayer residue flocculation
      Jones, Franca (1998)
      The aim of this study was to determine the mechanism of Bayer residue flocculation. Hematite was chosen as the test substrate as it is a common Bayer residue mineral. Batch settling tests were used to gain an understanding ...
    • Amino acid functionalised calixarenes: crystal growth modifiers and low molecular weight gelators
      Goh, Ching Yong (2012)
      A selection of amino acid functionalised calix[4]arenes was studied. Acidic amino acid functionalised calixarenes were investigated as crystal growth modifiers. The self-assembly behaviour of proline functionalised ...
    • The fate of dosed copper to inhibit nitrification in chloraminated water distribution system
      Zhan, Weixi (2007)
      Chloramine as a secondary disinfectant has been widely used by many water utilities around the world especially in a distribution system requiring a longer retention time such as the 600km long Goldfield water distribution ...
    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.