Résumé:
This thesis falls within the general framework of the treatment of wastewater by
conventional and emerging processes. Three nano-materials were utilized to develop the aim
of this work. The three materials were characterized by SEM, BET, XRD and FTIR
techniques.
The grape marc considered as a vegetal waste was valorized thermochemically to be used for
the adsorption of two azo dyes in aqueous solution. The titanium oxide in its anatase phase
was used to degrade the same dyes. To reconcile the two processes, treatment of these
molecules was performed in the presence of a hybrid material synthesized by impregnating
(coating) the activated carbon by TiO2-anatase.
Both molecules AO7 and RB5 dyes were make in reactions in the presence of the three
materials to verify their adsorptive and photocatalytic properties. The valorized materials and
synthesized one have showed significant adsorption and heterogeneous photocatalysis
capacities. This offers a great advantage for wastewater treatment since the hybrid material
regenerates itself after contact with the pollutant. This feature applies only in the presence of a
low cost energy source to guarantee the perpetuity of activated carbon.
