Method, decontaminant and chemical kit for the...

Details Method, decontaminant and chemical kit for the... Method, decontaminant and chemical kit for the...

B - Operations, Transporting

09

C

B09C 1/04 (2006.01) B09C 1/02 (2006.01)

Patent

CA 2701000

The invention relates to a method for decontaminating a medium polluted by metals and hydrophobic organic compounds (COH), that comprises: (a) obtaining an acidic pulp from water, an acid, a chloride salt, a surfactant and the polluted medium; (b) making a floatation on the acidic pulp in order to form a COH-rich foam and a COH-depleted pulp; (c) recovering the foam; and (d) separating the depleted foam in order to obtain a processed solid and a liquid effluent rich in metal ions. The invention also relates to a decontaminant containing an acid, a chloride salt and a surfactant, and to a chemical kit for decontaminating a polluted medium, that comprises the decontaminant in which the acid, the chloride salt and the surfactant can be mixed with the polluted medium in the presence of water before removing a portion at least of the metals and of the COH from the polluted medium.

Image : L'invention comprend un procédé de décontamination d'un milieu pollué par des métaux et des composés organiques hydrophobes (COH), comprenant (a) obtenir une pulpe acide de l'eau, un acide, un sel de chlorure, un surfactant et le milieu pollué; (b) réaliser de flottation sur la pulpe acide pour former une mousse riche en COH et une pulpe appauvrie en COH; (c) récupérer la mousse; et (d) séparer la pulpe appauvrie pour obtenir un solide traité et un effluent liquide riche en ions métalliques. L'invention comprend aussi un décontaminant comprenant un acide, un sel de chlorure et un surfactant ainsi qu'un kit chimique pour la déconta- mination du milieu pollué comprenant le décontaminant dans lequel l'acide, le sel de chlorure et le surfactant peuvent être mélangés avec le milieu pollué en présence de l'eau avant d'enlever au moins une portion des métaux et des COH du milieu pollué.

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