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

    Calcium-phosphorus interactions at a nano-structured silicate surface

    20491_downloaded_stream_479.pdf (1.845Mb)
    Access Status
    Open access
    Authors
    Southam, Daniel
    Lewis, T.
    McFarlane, A.
    Borrmann, T.
    Johnston, J.
    Date
    2007
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Southam, Daniel C. and Lewis, Trevor W. and McFarlane, Andrew J. and Borrmann, T. and Johnston, Jim H.. 2007. Calcium-phosphorus interactions at a nano-structured silicate surface. Journal of Colloid and Interface Science 319: 489-497.
    Source Title
    Journal of Colloid and Interface Science
    DOI
    10.1016/j.jcis.2007.12.012
    Faculty
    Department of Applied Chemistry
    Division of Engineering, Science and Computing
    Faculty of Science
    Remarks

    Copyright 2008 Elsevier B.V. All rights reserved

    URI
    http://hdl.handle.net/20.500.11937/31928
    Collection
    • Curtin Research Publications
    Abstract

    Nano-structured calcium silicate (NCS), a highly porous material synthesized by controlledprecipitation from geothermal fluids or sodium silicate solution, was developed as filler for use inpaper manufacture. NCS has been shown to chemisorb orthophosphate from an aqueous solutionprobably obeying a Freundlich isotherm with high selectivity compared to other commonenvironmental anions. Microanalysis of the products of chemisorption indicated there wassignificant change from the porous and nano-structured morphology of pristine NCS to fibrous andcrystalline morphologies and non-porous detritus. X-ray diffraction analysis of the crystallineproducts showed it to be brushite, CaHPO4?2H2O, while the largely x-ray amorphous componentwas a mixture of calcium phosphates. A two-step mechanism was proposed for the chemisorption ofphosphate from an aqueous solution by NCS. The first step, which was highly dependent on pH, wasthought to be desorption of hydroxide ions from the NCS surface. This was kinetically favoured atlower initial pH, where the predominant form of phosphate present was H2PO4-, and led to decreasedphosphorus uptake with increasing pH. The second step was thought to be a continuingchemisorption process after stabilization of the pH-value. The formation of brushite as the primarychemisorption product was found to be consistent with the proposed mechanism.

    Related items

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

    • Microstructure and nanoscaled characterization of HVFA cement paste containing Nano-SiO2 and Nano-CaCO3
      Shaikh, Faiz; Supit, S.; Barbhuiya, Salim (2017)
      This paper presents the effects of nano-SiO 2 and nano-CaCO 3 on the microstructure of high-volume fly ash (HVFA) cement paste. The microstructures of HVFA cement pastes containing 40 and 60% Class F fly ash were evaluated ...
    • Electrospun 3D composite nano-flowers for high performance triple-cation perovskite solar cells
      Mahmud, M.; Elumalai, Naveen Kumar; Pal, B.; Jose, R.; Upama, M.; Wang, D.; Goncales, V.; Xu, C.; Haque, F.; Uddin, A. (2018)
      Three dimensional (3-D) flower-shaped SnO2-TiO2 nano-structure has been synthesized by electro-spinning and incorporated on top of sol-gel ZnO ETL to fabricate highly efficient (highest efficiency: 17.25%) triple-cation ...
    • Nano-structured gratings for improved light absorption efficiency in solar cells
      Masouleh, F.; Das, Narottam; Rozati, S. (2016)
      © 2016 by the authors. Due to the rising power demand and substantial interest in acquiring green energy from sunlight, there has been rapid development in the science and technology of photovoltaics (PV) in the last few ...
    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.