Kinetics of metal-humate interactions.

Dominic M. Jones, Nick D. Bryan, Malcolm N. Jones

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Investigations have shown that the migration behavior of metals cannot be described by a thermodn. equil. approach, but kinetically governed processes need to be included. The aim of this work is to investigate the dissocn. kinetics of metals with humic acids. A cation exchange resin was used to scavenge dissocd. ions of Eu(III) complexed with humic acid as a function of pre-equilibration time, metal concn., ionic strength and humic concn. Batch expts., using radioactive tracer quantities of 152Eu were performed. Gamma spectrometry was used to measure the amt. of metal dissocd. from humic over a period of time. Rates of reaction have been calcd. Zeta potentials have been used to study the changes that occur in a humic colloid under different conditions, for example as functions of pH and ionic strength. They can provide useful structural information on the behavior of humic substances upon metal ion binding. [on SciFinder (R)]
    Original languageEnglish
    Title of host publicationAbstracts of Papers, 223rd ACS National Meeting, Orlando, FL, United States, April 7-11, 2002
    Publication statusPublished - Apr 2002

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