Stable isotopes analysis combined with X-ray absorption spectroscopy reveal the fate of organic waste-borne copper and zinc in amended soils

Pappoe Abraham Nii Akwei, Fekiacova-Castanet Zuzana, Guihou Abel, Bosch-Serra Angela D., Deschamps Pierre, Feder Frédéric, Magid Jakob, Morvan Thierry, Testemale Denis, Doelsch Emmanuel. 2024. Stable isotopes analysis combined with X-ray absorption spectroscopy reveal the fate of organic waste-borne copper and zinc in amended soils. Journal of Hazardous Materials, 480:136039, 10 p.

Résumé : Copper (Cu) and zinc (Zn), two potentially toxic trace elements, are commonly abundant in organic wastes (OWs) recycled in soils as fertilizer. Yet current knowledge on the long-term behavior and fate of Cu and Zn in soil following OW spreading is scant. We addressed this issue by studying the fate of OW-borne Cu and Zn in amended soils from four different long-term field experiments. By combining the stable isotope analysis and X-ray absorption spectroscopy, we identified changes in Cu and Zn concentrations, speciation and isotopic compositions in the amended soils only when OW had been applied at high rates over long periods. Under these conditions, we highlighted that: (i) all OW-derived Cu and Zn had accumulated in the topsoil layer regardless of the soil and OW type; (ii) the amended soil isotopic signatures were the result of the mixing of OW-borne and natural Cu and Zn; and (iii) Cu and Zn exhibited distinct speciation patterns in amended soils. Indeed, the unprecedented persistence of OW-borne crystallized Cu(I)-sulfide in the amended soils contrasted with the complete transformation of pig slurry-borne nanosized Zn-sulfide or household compost-derived amorphous Zn phosphate and Zn complexed by organic matter.

Mots-clés Agrovoc : spectroscopie aux rayons x, déchet organique, amendement organique, analyse de sol, oligo-élement, lisier, amendement du sol, isotope du zinc, engrais organique, expérimentation au champ, zinc, cuivre

Mots-clés géographiques Agrovoc : France, La Réunion

Mots-clés libres : Agricultural recycling, Isotopes, Speciation, Trace element

Agences de financement européennes : European Commission

Agences de financement hors UE : Agence Nationale de la Recherche

Programme de financement européen : H2020

Projets sur financement : (EU) DEcentralised Citizens Owned Data Ecosystem, (FRA) ANAEE-Services

Auteurs et affiliations

• Pappoe Abraham Nii Akwei, CIRAD-PERSYST-UPR Recyclage et risque (FRA)
• Fekiacova-Castanet Zuzana, Université Aix-Marseille (FRA)
• Guihou Abel, Université Aix-Marseille (FRA)
• Bosch-Serra Angela D., Universitat de Lleida (ESP)
• Deschamps Pierre, Université Aix-Marseille (FRA)
• Feder Frédéric, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0001-8434-5193
• Magid Jakob, UCPH (DNK)
• Morvan Thierry, Agrocampus Rennes (FRA)
• Testemale Denis, CNRS (FRA)
• Doelsch Emmanuel, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0002-7478-4296 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/610531/)

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