Selenium removal from petroleum refinery wastewater using an electrocoagulation technique

Henrik K. Hansen*, Sebastián Franco Peña, Claudia Gutiérrez, Andrea Lazo, Pamela Lazo, Lisbeth M. Ottosen

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    In the present work, an electrocoagulation technique was tested as a possible technological alternative for the treatment of selenium in wastewater from a petroleum refinery. For this purpose, a batch airlift reactor with air stirring was used. The sacrificial electrodes were made of iron to generate the necessary ferrous ions for the process. The results indicated a selenium removal of 90% from the wastewater after 6 h of treatment, achieving a decrease in concentration from 0.30 mg L-1 to 0.03 mg L-1. The current density was found to be an important variable for the process. In conclusion, the electrocoagulation process seems to be a feasible selenium removal technique applied to petroleum refinery wastewater.
    Original languageEnglish
    JournalJournal of Hazardous Materials
    Volume364
    Pages (from-to)78-81
    ISSN0304-3894
    DOIs
    Publication statusPublished - 2018

    Keywords

    • Current density
    • Electrocoagulation
    • Iron hydroxides
    • Oxidizing medium
    • Selenium

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