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    The interaction of EDTA with barium sulfate

    117868_Jones%20The%20interaction%20of%20EDTA.pdf (2.098Mb)
    Access Status
    Open access
    Authors
    Jones, Franca
    Jones, Philip
    Ogden, Mark
    Richmond, William
    Rohl, Andrew
    Saunders, M.
    Date
    2007
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Jones, Franca and Jones, Philip and Ogden, Mark and Richmond, William and Rohl, Andrew and Saunders, Martin. 2007. The interaction of EDTA with barium sulfate. Journal of Colloid and Interface Science. 316: pp. 553-561.
    Source Title
    Journal of Colloid and Interface Science
    DOI
    10.1016/j.jcis.2007.09.005
    ISSN
    00219797
    Faculty
    Department of Applied Chemistry
    School of Science
    Faculty of Science and Engineering
    Remarks

    The link to the journal's home page is: http://www.elsevier.com/wps/find/journaldescription.cws_home/622861/description#description

    Copyright © 2009 Elsevier B.V. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/35537
    Collection
    • Curtin Research Publications
    Abstract

    Ethylenediaminetetraacetic acid (EDTA) is a known complexing agent that interacts with a host of cations. In this paper, various techniques are used to elucidate the mechanism of interaction between EDTA and barium sulfate surfaces. It is shown that complexation with metal ions is not sufficient to explain the inhibition of barite crystallization but that other processes such as chemisorption must also occur. EDTA is shown to always adsorb as the mono-protonated species?suggesting that the molecule is able to lose a proton when it adsorbs at lower pH. Molecular modelling shows that the interaction of the surface barium ions with the carboxylate group is an important one. Finally, in situ turbidity measurements provide information about the mechanism of nucleation/growth modification. It is found that the EDTA molecule inhibits barium sulfate nucleation and that this could be its primary means of inhibiting precipitation of barium sulfate.

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