Centre National De La Recherche Scientifique

Veolia Eau, Compagnie Generale Des Eaux

Arnaud Bucaille

Roger Guilard

Franck Denat

Cyrille Lemoine

Michel Meyer

Francois Cuenot

Frédéric Boschetti

Marie-Pierre Denieul

Olivier Daniel

François Cuenot

The present invention relates to a material notably adapted for the extraction of metal cations in an aqueous medium, comprising a solid support on which are attached polyazacycloalkane compounds having a ring including at least 4 nitrogen atoms, and wherein the nitrogen atoms of the ring are substituted with coordinating groups, which each are independently: The invention also relates to methods for preparing the aforementioned materials and to different uses thereof, notably for the extraction of Pbcations in an aqueous medium.

Materials for the solid/liquid extraction of heavy metal ions, containing supported N-functionalized polyazacycloalkanes

The invention relates to a method of qualifying the variability of the composition of an effluent, in which method a series of measurements is effected over time of at least one first and one second parameter of the effluent. The invention is characterized in that, in each time step, first and second derivatives of the parameters are determined, first and second logical domains are defined, probabilities of the first derivatives belonging to the first logical domains are assigned, probabilities of the second derivatives belonging to the second logical domains are assigned, global logical domains are defined, global probabilities of belonging to the global logical domains are assigned, and the variability of the composition of the effluent is qualified on the basis of these global probabilities of belonging to the global logical domains.

Method for qualifying the variability of an effluent composition

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Colombes, France

Arnaud Bucaille