Sonication treatment of polychlorinated biphenyl...

B - Operations – Transporting – 09 – C

Patent

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B09C 1/02 (2006.01) A62D 3/00 (2006.01)

Patent

CA 2482535

The invention consists of a method for treating polychlorinated biphenyl (PCB) contaminated media by: a) combining the media with a fluid containing one or more liquid hydrocarbons to form a media/fluid mixture; b) sonicating the mixture at audio frequency to extract PCB from the media into the fluid; and c) treating the fluid with sodium-containing alkali metal. The method may include additional steps to reduce the size of the media. Alternatively, the fluid can be decanted from the media after sonication and treated separately with sodium-containing alkali metal.

L'invention se rapporte à un procédé de traitement d'un milieu contaminé par du biphényle polychloré (PCB), qui consiste à: a) combiner le milieu avec un fluide contenant un ou plusieurs hydrocarbures liquides de manière à former un mélange milieu/fluide; b) effectuer une sonification du mélange à une fréquence sonore de manière à extraire le PCB du milieu et à le faire passer dans le fluide; et c) traiter le fluide avec un métal alcalin contenant du sodium. Le procédé de l'invention peut également inclure des étapes supplémentaires de réduction de la taille du milieu. Une autre possibilité consiste à procéder à une décantation du fluide à partir du milieu après sonification et à traiter séparément le fluide avec un métal alcalin contenant du sodium.

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