Contrasted fate of zinc sulfide nanoparticles in soil revealed by a combination of X-ray absorption spectroscopy, diffusive gradient in thin films and isotope tracing

Le Bars Maureen, Legros Samuel, Levard Clément, Chevassus-Rosset Claire, Montes Mélanie, Tella Marie, Borschneck Daniel, Guihou Abel, Angeletti Bernard, Doelsch Emmanuel. 2022. Contrasted fate of zinc sulfide nanoparticles in soil revealed by a combination of X-ray absorption spectroscopy, diffusive gradient in thin films and isotope tracing. Environmental Pollution, Part B:118414, 9 p.

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Incidental zinc sulfide nanoparticles (nano-ZnS) are spread on soils through organic waste (OW) recycling. Here we performed soil incubations with synthetic nano-ZnS (3 nm crystallite size), representative of the form found in OW. We used an original set of techniques to reveal the fate of nano-ZnS in two soils with different properties. 68Zn tracing and nano-DGT were combined during soil incubation to discriminate the available natural Zn from the soil, and the available Zn from the dissolved nano-68ZnS. This combination was crucial to highlight the dissolution of nano-68ZnS as of the third day of incubation. Based on the extended X-ray absorption fine structure, we revealed faster dissolution of nano-ZnS in clayey soil (82% within 1 month) than in sandy soil (2% within 1 month). However, the nano-DGT results showed limited availability of Zn released by nano-ZnS dissolution after 1 month in the clayey soil compared with the sandy soil. These results highlighted: (i) the key role of soil properties for nano-ZnS fate, and (ii) fast dissolution of nano-ZnS in clayey soil. Finally, the higher availability of Zn in the sandy soil despite the lower nano-ZnS dissolution rate is counterintuitive. This study demonstrated that, in addition to nanoparticle dissolution, it is also essential to take the availability of released ions into account when studying the fate of nanoparticles in soil.

Mots-clés Agrovoc : pollution du sol, nanoparticules, chimie du sol, dissolution, spectroscopie aux rayons x, analyse isotopique

Mots-clés géographiques Agrovoc : Sénégal, La Réunion, France

Mots-clés complémentaires : Sulfure de zinc

Mots-clés libres : Dissolution, Availability, Clay, Sand, Speciation

Classification Agris : P33 - Chimie et physique du sol
P02 - Pollution

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Agences de financement européennes : European Commission

Programme de financement européen : H2020

Projets sur financement : (EU) SPEciation and dynamiCs of TRace Elements

Auteurs et affiliations

• Le Bars Maureen, Aix-Marseille université (FRA) - auteur correspondant
• Legros Samuel, CIRAD-PERSYST-UPR Recyclage et risque (SEN) ORCID: 0000-0001-7081-6679
• Levard Clément, CNRS (FRA)
• Chevassus-Rosset Claire, CIRAD-PERSYST-UPR Recyclage et risque (FRA)
• Montes Mélanie, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0002-0678-0541
• Tella Marie, CIRAD-PERSYST-US Analyses (FRA)
• Borschneck Daniel, CNRS (FRA)
• Guihou Abel, Aix-Marseille université (FRA)
• Angeletti Bernard, Aix-Marseille université (FRA)
• Doelsch Emmanuel, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0002-7478-4296

Source : Cirad-Agritrop (https://agritrop.cirad.fr/599597/)

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