Process for the treatment of contaminated material

Details Process for the treatment of contaminated material Process for the treatment of contaminated material

A - Human Necessities

62

D

A62D 3/02 (2007.01) A62D 3/36 (2007.01) B09C 1/02 (2006.01) B09C 1/10 (2006.01) C02F 3/34 (2006.01) C02F 11/00 (2006.01) C22B 3/00 (2006.01) C22B 3/18 (2006.01)

Patent

CA 2183583

A process for the decontamination of a medium comprising a material contaminated with one or more organic species and one or more metal species comprises the steps of treating a body of the said medium by a process which breaks down the organic contaminant(s) by or through the action of microbial agents followed by treating the same body with microbially produced sulphuric acid so as to solubilise and leach the metal species as a metal sulphate and treating the leached metal sulphate by a bioprecipitation process which converts the said sulphate to one or more insoluble metal sulphides.

Ce procédé de décontamination d'un milieu comprenant un matériau contaminé par une ou plusieurs espèces organiques et par une ou plusieurs espèces métalliques comprend les étapes consistant à traiter un corps dudit milieu à l'aide d'un procédé de dissociation du (des) contaminant(s) organique(s) par ou à travers l'action d'agents microbiens, à traiter ensuite ce même corps avec de l'acide sulfurique produit par voie microbienne de façon à dissoudre et lessiver l'espèce métallique afin d'obtenir un sulfate de métal, et enfin à traiter le sulfate de métal lessivé à l'aide d'un procédé de précipitation biologique transformant ledit sulfate en un ou plusieurs sulfures métalliques insolubles.

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