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Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Marine & Wildlife Sign in to save

Towards improved predictions of dispersal of weathering microplastics in the aquatic environment by numerical modelling

Flanders Marine Institute (Flanders Marine Institute) 2018
Toorman, Erik, Hans Peter H. Arp, Elena Gorokhova, Dieter Issler, Kathrin Oelschlägel, Annegret Potthoff, Samor Wongsoredjo, Manon Hussenot, Eric McGivney

Summary

Scientists found that regular plastic (polystyrene) particles harmed water fleas more than plant-based biodegradable plastic (PLA), which caused effects similar to natural clay particles rather than something uniquely toxic. This suggests that switching to biodegradable plastics might reduce harm to aquatic life, though researchers still need to figure out exactly why conventional plastics are more toxic before drawing firm conclusions.

effects were not caused by toxic monomers of styrene or additives leaching out of the polymer, which was demonstrated in a follow-up test with the PS leachates.By contrast, no significant effects were found in the daphnids exposed to PLA compared to the reference treatment.Thus, a significantly higher toxicity of the conventional polymer was observed, whereas effects of the biodegradable microplastics were similar to those caused by the ubiquitously occurring clay particles.More studies are needed to identify the mechanisms of PS toxicity and to confirm the observed ecotoxicological differences between the polymer types using different test materials and natural particulates.

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