Combining X-ray absorption spectroscopy (XAS) and diffusive gradients in thin films (DGT) to probe speciation and dynamic of heavy metals in soils amended with organic wastes

Tella Marie, Proux Olivier, Hazemann Jean-Louis, Briois Valérie, Bravin Matthieu, Doelsch Emmanuel. 2013. Combining X-ray absorption spectroscopy (XAS) and diffusive gradients in thin films (DGT) to probe speciation and dynamic of heavy metals in soils amended with organic wastes. In : 15 ème Conférence internationale RAMIRAN: Recyclage des résidus organiques pour l'agriculture: de la gestion des déchets aux services écosystémiques, Versailles, France, 3 au 5 juin 2013. INRA. s.l. : INRA, 4 p. International Ramiran Conference. 15, Versaille, France, 3 Juin 2013/5 Juin 2013.

Résumé : Applications of so-called organic wastes are recommended in agricultural fields where soil organic matter content is low. However, these materials could pose some hazard to humans, animals, or to the environment through the assessment of the dynamic of potential pollutants such as trace metals. This study thus aimed at evaluating the speciation of copper (Cu) and zinc (Zn) in various organic wastes exhibiting moderate to high levels of trace metals, their dynamic in a soil after amendment and their mutual correlation. Trace metals speciation was determined by X-ray absorption spectroscopy (XAS) while the temporal dynamic remobilization in soil/waste mixtures was monitored using the diffusive gradient in thin films (DGT) technique. Results indicated that predominant pools of species in wastes were inorganic for Zn (>60%) and organic for Cu (>50%). During mineralization, we detected an increase in the remobilization of trace elements in soil/waste mixtures, which was more noticeable for Zn than for Cu.

Classification Agris : Q70 - Traitement des déchets agricoles
U30 - Méthodes de recherche
P02 - Pollution
P33 - Chimie et physique du sol

Auteurs et affiliations

• Tella Marie
• Proux Olivier, OSUG (FRA)
• Hazemann Jean-Louis, Institut Néel (FRA)
• Briois Valérie, SOLEIL synchrotron (FRA)
• Bravin Matthieu, CIRAD-PERSYST-UPR Recyclage et risque (REU) ORCID: 0000-0002-1436-7837
• Doelsch Emmanuel, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0002-7478-4296

Source : Cirad - Agritrop (https://agritrop.cirad.fr/570572/)

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