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    Influence of chemical reaction kinetics on electrokinetic remediation modelling results

    • Autor
      Masi, Matteo; Paz-García, Juan ManuelAutoridad Universidad de Málaga; Gómez-Lahoz, CésarAutoridad Universidad de Málaga; Villén-Guzmán, María DoloresAutoridad Universidad de Málaga; Ceccarini, Alessio; Iannelli, Renato
    • Fecha
      2017-10-11
    • Palabras clave
      Electrocinética
    • Resumen
      A numerical model describing transport of multiple species and chemical reactions during electrokinetic treatment is presented. The transport mechanisms included in the model were electromigration and electroosmosis. The chemical reactions taken into account were water electrolysis at the electrodes, aqueous species complexation, precipitation, and dissolution. The model was applied to simulate experimental data from an acid-enhanced electrokinetic treatment of a Pb-contaminated calcareous soil. The kinetics of the main pH buffering process (i.e., calcite dissolution) was taken into account and its time-dependent behavior was described by a rate law. The influence of kinetics was evaluated by comparing the results from a set of simulations in which calcite dissolution was implemented considering thermodynamic equilibrium and another set in which the same reaction was described by the rate law. The results show that the prediction capability of the model significantly improves when the kinetic rate is taken into account.
    • URI
      http://hdl.handle.net/10630/14619
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    Ficheros
    EREM 2017 publicacion.pdf (898.3Kb)
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    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA
    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA