The interaction of EDTA with barium sulfate
MetadataShow full item record
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.
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.
Showing items related by title, author, creator and subject.
Jones, Franca; Rohl, Andrew (2005)Molecular modelling has been successfully used to interpret the effect of two molecules on the crystal growth of barium sulfate. The replacement energy was found to correlate with the degree of inhibition as determined ...
Goh, Ching Yong (2012)A selection of amino acid functionalised calixarenes was studied. Acidic amino acid functionalised calixarenes were investigated as crystal growth modifiers. The self-assembly behaviour of proline functionalised ...
Radomirovic, T.; Ogden, Mark; Rohl, Andrew; Jones, Franca (2019)Macrocyclic compounds such as DOTP (1,4,7,10-tetraazacyclododecanetetrakis(methylenephosphonic acid)) and NOTP (1,4,7,-triazacyclononanetri(methylenephosphonic acid)) are found to inhibit precipitation of barium sulfate ...