Catalytic ozonation of industrial effluents

The directive of October, 2000 impose a « good chemical and ecological state of the aquatic systems ». These regulations have for consequence to change the vision of the industrial effluent treatment. The water pollution by Polycyclic Aromatic Hydrocarbon (PAH) is indisputable and presents real risks for the environment and the health, what led the European Commission to classify them as priority substances. The processes of advanced oxidation are adapted to degrade the bio-refractory and toxic compounds, thanks to the use of the radicals hydroxyls. These radicals, which are very efficient oxydants, can be generated in various ways and allow to treat a large number of organic pollutants.

The GPM team is interested in the development of a new treatment process of complex industrial waste water. The main idea is to use the ozone combined with new macroporous zeolitic materials to associate a property of ozone decomposition in hydroxyls radicals and a property of adsorption on these solids. This combination allows increasing the rate of degradation of the pollutants. The use of a solid with hierarchical porosity (macro, méso, microporosity) allows a preservation of adsorption and catalytic long-term properties as well as an improvement of the transfers of pollutant inside the catalyst. This work is led in association with the institute Charles Gerhardt for the synthesis of materials. The optimization of the separation of the catalyst by membrane process is also studied to operate a continuous process.

From catalyst synthesis to the oxydation of an organic pollutant

Experimental set-up for ozonation

TOC removal during ozonation of organic pollutant

Synthesis of binderless zeolite aggregates (SOD, LTA, FAU) beads of 10, 70 μm and 1 mm by direct pseudomorphic transformation, Maria Mańko, Jullian Vittenet, Jeremy Rodriguez, Didier Cot, Julie Mendret, Stephan Brosillon, Wacław Makowski, Anne Galarneau, Microporous and Mesoporous Materials 176, 145-154, 2013

Removal of 2,4-dimethylphenol pollutant in water by ozonation catalyzed by SOD, LTA, FAU-X zeolites particles obtained by pseudomorphic transformation (binderless), Jullian Vittenet, Jeremy Rodriguez, Eddy Petit, Didier Cot, Julie Mendret, Anne Galarneau, Stephan Brosillon, Microporous and Mesoporous Materials, In Press, 2013

Contacts :

Stéphan BROSILLON, Julie MENDRET