Comportement d'un herbicide dans l'environnement. Etude de la volatilisation et de la dégradation de l'atrazine

Atrazine is one of the most common herbicide used in corn culture in France. The aim of this work is to study atrazine volatilization and degradation after soil deposition. in order to quantify this pollution source. In this way, the Atrazine driving when the water evaporation occures was shown in laboratory and its presence in the atmosphere vas demonstrated in real setting. As a matter of fact, a similarity appears between water and atrazine "volatilisation" profiles. As for its volatilisation, that's clear that in the absence of humidity, Atrazine after soil deposition doesn't volatilize directly or indirectly. At last, its degradation was studied in adsorbed and aqueous phases. It appears that atrazine degradation doesn't occure on soil but probably in water droplets after atrazine driving in the atmosphere. Deethylatrazine, deisopropylatrazine, didealkylatrazine, and hydroxyatrazine are the most common metabolites found.