Evaluation of IrO2-Ta2O5|Ti electrodes employed during the electroremediation of hydrocarbon-contaminated soil

 

Sustain. Environ. Res., 23(4), 279-284 (2013)

 

AUTHORS

Maribel Pérez-Corona, Arturo Corona, Elías Daniel Beltrán, Jesús Cárdenas and Erika Bustos

KEY WORDS

Hydrocarbons, electroremediation, DSA

ABSTRACT

Improper handling of hazardous materials and wastes such as hydrocarbons (HCs) has resulted in widespread soil contamination, a serious worldwide problem. One of the methods to remove contaminants in solid matrices is soil electroremediation (ER), which has been widely used by applying an electric field in the presence of carbon or metal, where the latter has been modified with oxides to develop dimensionally stable anodes such as IrO2-Ta2O5|Ti.

We evaluated the performance of the IrO2-Ta2O5|Ti electrode for the ER of soil contaminated with heavy and intermediate fraction of HCs. Polarization curves were developed in three different ways to obtain the density corrosion current according to the standard and they were high (around -0.89 mA cm-2) compared to the literature which differs from each another. Furthermore, the surface was characterized by scanning electron microscopy and energy dispersive spectroscopy to show no surface morphological change after electrode polarization.


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