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 language | English |
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Journal | Journal of Hazardous Materials |
Volume | 364 |
Pages (from-to) | 78-81 |
ISSN | 0304-3894 |
DOIs | |
Publication status | Published - 2018 |
Keywords
- Current density
- Electrocoagulation
- Iron hydroxides
- Oxidizing medium
- Selenium