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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