The shape and speciation of Ag nanoparticles drive their impacts on organisms in a lotic ecosystem

Melanie Auffan; Catherine Santaella; L Brousset; M Tella; E Morel; P Ortet; M Barakat; C Chaneac; J Issartel; B Angeletti; C Levard; J-L Hazemann; M Wiesner; J Rose; A Thiéry; J-Y Bottero

doi:10.1039/d0en00442a

Journal articles

The shape and speciation of Ag nanoparticles drive their impacts on organisms in a lotic ecosystem

Melanie Auffan ¹ Catherine Santaella ² L Brousset ³ M Tella ^{4, 5} E Morel ¹ P Ortet ² M Barakat ² C Chaneac ⁶ J Issartel ³ B Angeletti ¹ C Levard ¹ J-L Hazemann ⁷ M Wiesner ⁸ J Rose ^{1, 8} A Thiéry ³ J-Y Bottero ^{1, 8}

1 CEREGE - Centre européen de recherche et d'enseignement des géosciences de l'environnement

2 LEMIRE - Laboratoire d'Ecologie Microbienne de la Rhizosphère et d'Environnements Extrêmes

BIAM - Institut de Biosciences et Biotechnologies d'Aix-Marseille (ex-IBEB) : DRF/BIAM

3 IMBE - Institut méditerranéen de biodiversité et d'écologie marine et continentale

4 US Analyses - Analyses des eaux, sols et végétaux

5 Cirad-PERSYST - Département Performances des systèmes de production et de transformation tropicaux

6 LCMCP - Laboratoire de Chimie de la Matière Condensée de Paris

7 MRS - Matériaux, Rayonnements, Structure

NEEL - Institut Néel

8 Duke University [Durham]

Abstract : Silver nanomaterials with different shapes (spheres, plates, wires, rods, cubes) are valued by industries and scientists for their shape-dependent properties which make them useful for diverse applications. In a saferby-design perspective, controlling the shape of Ag nanomaterials could be an option to increase their properties while lowering either their hazard or their exposure potentials. Nine indoor aquatic mesocosms reproducing a lotic ecosystem were contaminated with chronic low-level additions of Ag nanospheres (Sp-Ag) and nanoplates (Pl-Ag) for a month. A shape-dependent impact under such environmentally relevant exposure conditions was observed. Pl-Ag induced a moderate oxidative stress in adult Gammarus fossarum (after molting) and a hormesis effect on planktonic microbial communities, while Sp-Ag had no effect. In an environmental risk perspective, our results highlight which ecological niches of a lotic ecosystem would be more impacted by Pl-Ag: (i) >72% of the total Ag was found fully sulfidized in surficial sediment and had only a moderate impact on benthic macro-organisms, (ii) only 11% to 15% of the Ag remained in the water column after 1 month, but Ag was under a more reactive speciation that impacts the planktonic community.

Document type :

Journal articles

Domain :

Environmental Sciences

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https://hal-amu.archives-ouvertes.fr/hal-03065323
Contributor : Catherine Santaella <>
Submitted on : Tuesday, December 15, 2020 - 4:11:32 PM
Last modification on : Monday, March 29, 2021 - 1:38:03 PM
Long-term archiving on: : Tuesday, March 16, 2021 - 7:36:52 PM

The shape and speciation of Ag nanoparticles drive their impacts on organisms in a lotic ecosystem

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The shape and speciation of Ag nanoparticles drive their impacts on organisms in a lotic ecosystem

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