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Etude d'un procédé de dépollution basé sur le couplage ozone/charbon actif pour l'élimination des phtalates en phase aqueuse

Abstract : In order to comply with the standards governing the discharge of industrial effluents (Water Framework Directive, target date 2021) concerning micropollutants, in particular phthalates, innovative wastewater treatment processes have to be used. The present research addresses this issue through a study of ozone/activated carbon coupling. After determining the textural and chemical properties of several activated carbons, the efficiency of this coupling for the removal of phthalates was tested according to the following criteria: degradation kinetics of the target pollutants and evolution of both toxicity and mineralization during the process. Compared to the classical methods (ozonation or adsorption used separately), coupling proved to be highly efficient. It enables the fast removal of pollutants with a significant decrease in mineralization and toxicity. Coupling also proved to be efficient for the treatment of more complex matrices such as municipal wastewater treatment outflow. Moreover, the activated carbon properties which favour the process have also been determined. It is shown that, in this coupling, the material acts as a radical initiator and promoter (the reactions are mainly radical in nature) and as a reaction support. Lastly, the study also shows that in situ regeneration of the activated carbon, which would be economically attractive, could be achieved during the process.
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Submitted on : Tuesday, February 28, 2012 - 11:17:18 AM
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Tatianne Ferreira de Oliveira Ferreira de Oliveira Penalver. Etude d'un procédé de dépollution basé sur le couplage ozone/charbon actif pour l'élimination des phtalates en phase aqueuse. Alimentation et Nutrition. Université d'Orléans, 2011. Français. ⟨NNT : 2011ORLE2029⟩. ⟨tel-00674791⟩

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