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Dernière mise à jour : Mai 2018

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Modélisation de la dynamique des HAPs dans les sols suivant un gradient de contamination allant d’un contexte agricole à un contexte industriel

Modélisation de la dynamique des HAPs
Fait marquant EcoSys P. Garnier 2018

Résumé :

Nous avons développé un nouveau modèle numérique basé sur le couplage des processus majeurs contrôlant la dynamique des HAP dans le sol. Ce modèle interdisciplinaire a été mis en place dans le cadre d’une collaboration en lien avec la plateforme VSoil de l’INRA (https://www6.inra.fr/vsoil/The-Project), et est applicable à l’échelle du terrain sur une large gamme de sols suivant un gradient de contamination allant d’un contexte agricole à teneur faible (environ à 30 µg/kg sol sec) à un contexte industriel à teneur forte (environ à 100 mg/kg sol sec). Nos résultats montrent que le modèle peut prédire de manière satisfaisante le devenir des HAP dans les différents contextes. Il a permis de confirmer que l’interaction physico-chimique est bien le processus majeur de limitation de la dissipation des HAP dans les sols. Le modèle prédit une diminution de 50% des HAPs dans le contexte industriel et une augmentation de 30% dans le contexte agricole.