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    Improving Cr (VI) Extraction through Electrodialysis

    • Autor
      García-Delgado, Rafael AntonioAutoridad Universidad de Málaga; Nieto-Castilo, A; Villén-Guzmán, María DoloresAutoridad Universidad de Málaga; Cerrillo-Gonzalez, Maria del Mar; Gómez-Lahoz, CésarAutoridad Universidad de Málaga; Vereda-Alonso, CarlosAutoridad Universidad de Málaga; Paz-García, Juan ManuelAutoridad Universidad de Málaga; Rodríguez-Maroto, José MiguelAutoridad Universidad de Málaga
    • Fecha
      2019-10-08
    • Palabras clave
      Electrodiálisis
    • Resumen
      A laboratory study has been carried out to determine the feasibility of in situ remediation of chromium (VI) contaminated soil using electrodialysis. In a classic setup, this technique implies the application of a low intensity direct current to the soil, which is separated from the electrode compartments by ion-exchange membranes. If the pollutants are ionic compounds, they can be forced to migrate to the oppositely charged electrode by electro-migration. Membranes selectively impede the flow of ions in the electrode compartments back to the soil. If a metal species is naturally present as an anion, mobilization from the soil at alkaline pH can be realized and, at the same time, the mobilization of other metal cations that occur at low pH can be minimized. Experiments have been carried out with clayey soils (kaolinite clay and soil clay mixtures) that have been characterized and then contaminated by mixing with a potassium dichromate solution for several days. Initial Cr (VI) content ranges from 500 to 4000 mg/kg. Treatment tests were carried out in an acrylic laboratory cells consisting of a central soil compartment and two electrode compartments located at both ends of the column. Dimensionally stable titanium electrodes coated with mixed metal oxides were placed in the electrode compartments. 0.01M Na2SO4 electrolytes were recirculated through them from two 1-liter deposits using a peristaltic pump. Two commercial ion exchange membranes separated the anolyte and catholyte compartments from the soil in the standard configuration. A programmable DC: power supply was connected to the electrodes and a computer for data acquisition.
    • URI
      https://hdl.handle.net/10630/18535
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    Ficheros
    Final Abstracts to EREM 2019 - 19.pdf (86.86Kb)
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    • IQ - Contribuciones a congresos científicos

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    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA
    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA
     

     

    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA
    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA