title: Increased zinc and copper availability in organic waste amended soil potentially involving distinct release mechanisms.
abstract: This study aimed at determining the fate of trace elements (TE) following soil organic waste (OW) application. We used a unique combination of X-ray absorption spectroscopy analyses, to determine TE speciation, with incubation experiments for in situ monitoring of TE availability patterns over a time course with the technique of the diffusive gradients in thin films (DGT). We showed that copper (Cu) and zinc (Zn) availability were both increased in OW-amended soil, but their release was controlled by distinct mechanisms. Zn speciation in OW was found to be dominated by an inorganic species, i.e. Zn sorbed on Fe oxides. Zn desorption from Fe oxides could explain the increase in Zn availability in OW-amended soil. Cu speciation in OW was dominated by organic species. Cu release through the mineralization of organic carbon from OW was responsible for the increase in Cu availability.
authors: CIRAD, UPR Recyclage et risque, F-34398, Montpellier, France; Aix-Marseille Univ., CNRS, IRD, CEREGE UMR 7330, F-13545, Aix en Provence cedex 4, France.
authors: Marie
authors: M
authors: Tella
authors: CIRAD, UPR Recyclage et risque, F-97408, Saint-Denis, Réunion, France.
authors: Matthieu N
authors: MN
authors: Bravin
authors: CIRAD, UPR Recyclage et risque, F-97408, Saint-Denis, Réunion, France.
authors: Laurent
authors: L
authors: Thuriès
authors: CIRAD, UPR Recyclage et risque, F-34398, Montpellier, France.
authors: Patrick
authors: P
authors: Cazevieille
authors: CIRAD, UPR Recyclage et risque, F-34398, Montpellier, France.
authors: Claire
authors: C
authors: Chevassus-Rosset
authors: Aix-Marseille Univ., CNRS, IRD, CEREGE UMR 7330, F-13545, Aix en Provence cedex 4, France; CEA, IBEB, Laboratory of Microbial Ecology of the Rhizosphere and Extreme Environments, Saint-Paul-lez-Durance, F-13108, France.
authors: Blanche
authors: B
authors: Collin
authors: Aix-Marseille Univ., CNRS, IRD, CEREGE UMR 7330, F-13545, Aix en Provence cedex 4, France.
authors: Perrine
authors: P
authors: Chaurand
authors: CIRAD, UPR Recyclage et risque, F-34398, Montpellier, France.
authors: Samuel
authors: S
authors: Legros
authors: CIRAD, UPR Recyclage et risque, F-34398, Montpellier, France. Electronic address: doelsch@cirad.fr.
authors: Emmanuel
authors: E
authors: Doelsch
mesh_terms: D003300:Copper / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D014131:Trace Elements / Q000032:analysis; D018505:Waste Management / Q000379:methods*; D014866:Waste Products / Q000032:analysis*; D056928:X-Ray Absorption Spectroscopy; D015032:Zinc / Q000032:analysis*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D014131:Trace Elements; D014866:Waste Products; D003300:Copper; D015032:Zinc
keywords: Bioavailability; Metals; Municipal solid waste compost; Pig manure; Sewage sludge