Electrokinetic transfer of contaminants from a thin layer of...

B - Operations – Transporting – 09 – C

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B09C 1/00 (2006.01)

Patent

CA 2172016

To decontaminate soil, a generally thin porous medium is used. A cathode is applied to one face of the porous medium and an anode is spaced apart from the other face of that porous medium to define a generally thin spacing for receiving a generally thin layer of soil to be decontaminated. An electric potential is applied to the first and second electrodes in view of transferring the contaminants from the thin layer of soil to the porous medium. A porous membrane may be positioned between the thin layer of soil and the anode. The system may be of the conveyor type to enable displacement of the porous medium, the porous membrane, and the layer of soil between the anode and the cathode. Also, the system may comprises a series of at least two pairs of anode and cathode supplied with electric potentials of different amplitudes.

Substrat poreux généralement de faible épaisseur pour la décontamination de sol. Une cathode est placée sur une des faces du substrat poreux, et une anode est placée de l'autre côté du substrat, à une distance de la surface laissant un faible espace pour le passage du sol à décontaminer. Un potentiel électrique est induit dans les deux électrodes afin de transférer les contaminants du sol au substrat poreux. Une membrane poreuse peut être placée entre la couche de sol et l'anode. Ce système peut prendre la forme d'un transporteur, déplaçant le substrat poreux, la membrane poreuse et la couche de sol entre l'anode et la cathode. Il peut aussi comporter une série de deux paires et plus d'électrodes dont les potentiels électriques sont d'amplitudes différentes.

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