期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 364, 期 -, 页码 78-81出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2018.09.090
关键词
Selenium; Electrocoagulation; Oxidizing medium; Current density; Iron hydroxides
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.
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