Soil remediation by an advanced oxidative method assisted with ultrasonic energy

A new process for the remediation of soil contaminated with hydrocarbons is proposed. The innovation consists on coupling an advanced oxidative method, using a Fenton-type catalyst, with the application of ultrasonic energy. The use of ultrasonic energy not only assists the desorption of the contami...

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Bibliographic Details
Published in:Journal of hazardous materials 2007-02, Vol.140 (1), p.399-402
Main Authors: Flores, Roberto, Blass, Georgina, Domínguez, Vanessa
Format: Article
Language:English
Subjects:
Advanced oxidation process
Applied sciences
Catalysis
Catalytic reactions
Chemical engineering
Chemistry
Decontamination. Miscellaneous
Environmental Pollution - prevention & control
Environmental Restoration and Remediation - methods
Exact sciences and technology
Fenton-type catalysts
General and physical chemistry
Hydrocarbons
Hydrogen Peroxide
Hydroxyl Radical
Methods
Oxygen
Pollution
Reactors
Soil
Soil and sediments pollution
Soil Pollutants
Soil remediation
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Ultrasonic energy
Ultrasonics
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Summary:A new process for the remediation of soil contaminated with hydrocarbons is proposed. The innovation consists on coupling an advanced oxidative method, using a Fenton-type catalyst, with the application of ultrasonic energy. The use of ultrasonic energy not only assists the desorption of the contaminants from the soil, but also promotes the formation of OH radicals, which are the oxidant agents involved in the oxidation process. Different Fenton-like catalysts were employed in the present study; however, the highest removal of toluene and xylenes were obtained with iron sulfate and copper sulfate, respectively. Also, hydrogen peroxide was tested at different concentrations, and it was found that increasing its concentration enhanced the removal of all the contaminants. Finally, it was demonstrated that applying ultrasonic energy to the reacting system process noticeably enhanced the global efficiency of the process due to a synergistic effect in conjunction with the hydrogen peroxide concentration and type of catalyst.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2006.09.044