Electrodialytic remediation of heavy metal polluted soil: treatment of water saturated or suspended soil

Lisbeth M. Ottosen, Pernille Erland Jensen, Gunvor Marie Kirkelund, Celia Dias-Ferreira, Henrik K. Hansen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    Electrodialytic soil remediation is a method for removal of heavy metals. Good results have previously been obtained with both treatment of a stationary, water saturated soil matrix and with remediation of a stirred suspension of soil in water. The two different setups have different uses. The first as in-situ or on-site treatment when there is no requirement for fast remediation, as the removal rate of the heavy
    metals are dependent on the distance between the electrodes (everything else equal) and in such application the electrode spacing must have a certain distance (often meters). In the stirred setup it is
    possible to shorten the transport route to few mm and to have a faster and continuous process. The present paper for the first time reports a direct comparison of the two options. The remediation of the
    stirred suspension showed faster than remediation of the water saturated soil even without a short distance between the membranes. The acidification of the suspended soil was fastest and following the
    mobilization of heavy metals. This may indicate that water splitting at the anion exchange membrane is used more efficiently in the stirred setup.
    Original languageEnglish
    Title of host publicationChemical Engineering Transactions
    Publication date2012
    ISBN (Print)978-88-95608-19-8
    Publication statusPublished - 2012
    EventBosicon: 3rd International Conference on Contaminated Sites Remediation - Rome, Italy
    Duration: 12 Jun 201214 Jun 2012
    Conference number: 3




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