ALMEDA, Rodrigo; GUNAALAN, Kuddithamby; ALONSO-LÓPEZ, Olalla; VILAS, Alejandro; CLERANDEAU, Christelle; LOISEL, Tara; NIELSEN, Torkel Gissel; CACHOT, Jérôme; BEIRAS, Ricardo

doi:10.1016/j.chemosphere.2023.138894

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Article de revue

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Chemosphere. 2023-08-01, vol. 333, p. 138894

Résumé en anglais

Plastics contain various types and amounts of additives that can leach into the water column when entering aquatic ecosystems. Some leached plastic additives are hazardous to marine biota at environmentally relevant concentrations. Disparate methodological approaches have been adopted for toxicity testing of plastic leachates, making comparison difficult. Here we propose a protocol to standardize the methodology to obtain leachates from microplastics (MPs) for aquatic toxicity testing. Literature reviewing and toxicity tests using marine model organisms and different types of MPs were conducted to define the main methodological aspects of the protocol. Acute exposure to leachates from the studied plastics caused negative effects on the early life stages of sea urchins and marine bacteria. We provide recommendations of key factors influencing lixiviation of MPs , such as particle size (<250 μm), solid-to-liquid ratio (1-10 g/L), mixing conditions (1-60 rpm), and lixiviation time (72 h). The proposed methodology was successful to determine the toxicity of leachates from different micronized plastics on marine biota. Our recommendations balance sensitivity, feasibility and environmental relevance, and their use would help ensure comparability amongst studies for a better assessment of the toxicity of plastic leachates on aquatic biota.< Réduire

Mots clés en anglais

Plastics

Ecosystem

Water Pollutants

Chemical

Microplastics

Aquatic Organisms

Toxicity Tests

URI

https://oskar-bordeaux.fr/handle/20.500.12278/201267

DOI

http://dx.doi.org/10.1016/j.chemosphere.2023.138894

Unités de recherche

EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805

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A protocol for lixiviation of micronized plastics for aquatic toxicity testing.

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Résumé en anglais

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