Recovery of metal contamination from soil

Details Recovery of metal contamination from soil Recovery of metal contamination from soil

B - Operations, Transporting

09

C

B09C 1/02 (2006.01) B09C 1/08 (2006.01) C22B 7/00 (2006.01)

Patent

CA 2169286

The invention is a process and an apparatus for removing metal contamination from soil. In the method, the soil is treated (2) to produce soil with a small particle size. The particulate soil is then separated (4) into a coarse fraction (9) and a fine fraction (3). The coarse fraction (9) and the fine fraction (3) are contacted with a leach solution in separate contacting zones (8 and 14) to remove the metal contamination from the soil the metal is removed from the leach solution and the leach solution recycled to the leaching zones.

Procédé et appareil destinés à éliminer la contamination métalliqur d'un sol. Ledit procédé consiste à traiter (2) le sol pour produire du sol à petite taille de particules, à séparer (4) le sol en une partie à particules grossières (9) et en une partie à particules fines (3), à mettre en contact la partie à particules grossières (9) et la partie à particules fines (3) avec une solution de lessivage dans des zones (8 et 14) de contact séparées afin de supprimer le contaminant métallique du sol, à séparer le métal de la solution de lessivage et à recycler ladite solution de lessivage vers les zones de lessivage.

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