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Electro ultrasonic remediation of polycyclic aromatic hydrocarbons from contaminated soil

Authors
  • Shrestha, Reena Amatya1
  • Pham, Thuy Duong1
  • Sillanpää, Mika1
  • 1 University of Kuopio, Laboratory of Applied Environmental Chemistry, Department of Environmental Sciences, Patteristonkatu 1, Mikkeli, FI-50100, Finland , Mikkeli (Finland)
Type
Published Article
Journal
Journal of Applied Electrochemistry
Publisher
Springer Netherlands
Publication Date
Apr 16, 2010
Volume
40
Issue
7
Pages
1407–1413
Identifiers
DOI: 10.1007/s10800-010-0117-7
Source
Springer Nature
Keywords
License
Yellow

Abstract

The polycyclic aromatic hydrocarbons (PAHs) with high molecular mass are renown for their high persistence in the soil, hydrophobic and toxicity. Remediation of these pollutants is still an unsolved task and needs more researches to be performed. The coupling of electrokinetics (EK) with ultrasonic energy (US) has advantages on desorbing and migrating PAHs from contaminated soil. US and EK work together to destroy PAHs. The objective of this study was to treat PAHs contaminated soil by using EK and ultrasonication. The contaminated oil contained about 100 mg kg−1 chrysene. Experiments with US, EK and combined EK and ultrasound were conducted in reactors and pans with and without iron anodes. Results indicated that the removal was more effective with lower concentrations of chrysene. The average removal was better in experiment with combined EK and ultrasound using iron anode. This might be due to increase in electroconductivity by iron ions.

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