B - Operations – Transporting – 09 – C
Patent
B - Operations, Transporting
09
C
B09C 1/00 (2006.01) B09C 1/08 (2006.01)
Patent
CA 2659831
A procedure for the on-site reduction to a predetermined level of the concentration of hexavalent chromium in a saturated or unsaturated contaminated area or ground, in which an in-depth treatment of this area or ground is carried out with a predetermined quantity of a gaseous mixture consisting of hydrogen and another inert gas in order to chemically reduce the hexavalent chromium to a state of lower valence, in particular to the state of trivalent chromium.
L'invention concerne un procédé pour la réduction sur site de la concentration en chrome hexavalent à un niveau prédéterminé, dans une zone ou un sol contaminé saturé ou non saturé. Ce procédé consiste à réaliser un traitement en profondeur de cette zone ou ce sol au moyen d'une quantité prédéterminée d'un mélange gazeux renfermant de l'hydrogène et un autre gaz inerte, de façon à réduire chimiquement le chrome hexavalent à un état de valence inférieure, et notamment à l'état de chrome trivalent.
Longoni Fabio
Mccarthy Tetrault Llp
LandOfFree
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