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Coupled selective adsorption and ozonation for non biodegradable COD removal

Pic, Jean-Stéphane and Manero, Marie-Hélène and Monneyron, Pierre and Debellefontaine, Hubert Coupled selective adsorption and ozonation for non biodegradable COD removal. (2005) In: 17th Ozone Wold Congress, 2005, 22-25 Aug 2005, Strasbourg, France .

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This paper investigates a new water treatment process based on the combined use of the pollutant adsorption onto a mineral surface, and the ozonation of the adsorbed species. Dioxane has been chosen as a model compound as it is refractory towards ozone alone, and two adsorbents (a high silica zeolite FAU and a mesoporous material M) are tested. Three sets of experiments are shown: pollutant adsorption alone, pollutant ozonation alone and the coupled adsorption/ozonation process. The first results show that FAU is not a well suited adsorbent, as dioxane adsorption itself is weak and, moreover, the coupled process does not induce any benefit. On the other hand, mesoporous material M gives better results, since dioxane removal has been achieved up to 50%. The difference between the two materials is attributed to their catalytic effect: whereas FAU does not react with ozone, M probably decomposes the oxidant, generating free radical species and thus acting as an advanced oxidation process.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Other partners > Ecole Nationale Supérieure de Chimie et de Physique de Bordeaux - ENSCPB (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Université de Bordeaux 1 (FRANCE)
Laboratory name:
Deposited On:14 Nov 2008 09:50

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