Removal of phenol from contaminated kaolin using electrokinetically enhanced in situ chemical oxidation

Prapisala Thepsithar, Edward P L Roberts

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The application of electrokinetic treatment to phenol contaminated soil combined with the addition of a chemical oxidant (permanganate) to the catholyte has been evaluated. It was found that the counter-current flow of the phenol (by electrosmosis) and permanganate (by electromigration) leads to a rapid oxidation of the phenol in the soil. After 5 days of treatment over 90% of the phenol (initial concentration 1 g kg-1 dry soil) in a 15 cm long container of kaolin was removed by electrokinetic treatment with a voltage gradient of 1 V cm-1 and an initial concentration of KMnO4 of 9 g L-1 in the catholyte. This level of treatment was achieved with an electrical energy consumption of less than 15 kWh per m3 of soil treated. © 2006 American Chemical Society.
    Original languageEnglish
    Pages (from-to)6098-6103
    Number of pages5
    JournalEnvironmental Science and Technology
    Volume40
    Issue number19
    DOIs
    Publication statusPublished - 1 Oct 2006

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