Remediation material and remediation process for sediments

Details Remediation material and remediation process for sediments Remediation material and remediation process for sediments

B - Operations, Transporting

09

C

B09C 1/08 (2006.01) E01H 12/00 (2006.01) B01J 20/02 (2006.01) C02F 1/42 (2006.01) C02F 1/58 (2006.01) C02F 11/00 (2006.01)

Patent

CA 2284766

A material and method for removal of environmental oxyanions (and especially phosphates), the material comprising a substrate such as a clay modified with complexing elements selected from Group IIIB. Group IVB, and lanthanide elements (or a mixture of such elements). The resultant modified substrate can bind oxyanions and make them unavailable for utilisation in the environment; in the case of phosphates, by algae and the like. The method includes forming a capping of material at the sediment/water interface, applying the material in the form of pellets at the sediment/water interface, or injecting the pellets into the sediment.

L'invention porte sur un matériau et un procédé utilisés pour éliminer les oxyanions dans l'environnement (et notamment les phosphates). Ce matériau comprend un substrat tel qu'une argile modifiée par des éléments complexants sélectionnés dans les groupes IIIB, IVB, et des éléments des lanthanides (ou un mélange de ces éléments). Le substrat modifié obtenu peut lier les oxyanions et les rendre inutilisables dans l'environnement; dans le cas des phosphates, par des algues et autres. Ce procédé consiste à former une structure de liaison de ce matériau à l'interface sédiment/eau, à appliquer le matériau se présentant sous forme de boulettes au niveau de l'interface sédiment/eau ou à injecter les boulettes dans le sédiment.

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