Details

Autor(en) / Beteiligte

• Kelpsiene, Egle
• Rydberg, Melinda
• Ekvall, Mikael T
• Lundqvist, Martin
• Cedervall, Tommy
• Sundaramanickam, Arumugam

Titel

Prolonged survival time of Daphnia magna exposed to polylactic acid breakdown nanoplastics

Ist Teil von

• PloS one, 2023-09, Vol.18 (9), p.e0290748-e0290748

Ort / Verlag

San Francisco: Public Library of Science

Erscheinungsjahr

2023

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Polylactic acid nanoparticles (PLA NPs) according to food and drug administration are biodegradable and biocompatible polymers that have received a lot of attention due to their natural degradation mechanism. Although there is already available information concerning the effects of PLA microplastic to aquatic organisms, the knowledge about PLA NPs is still vague. In the present study, we analyzed the chemical composition of engineered PLA NPs, daily used PLA items and their breakdown products. We show that PLA breakdown products are oxidized and may contain aldehydes and/or ketones. The breakdown produces nanosized particles, nanoplastics, and possibly other small molecules as lactide or cyclic oligomers. Further, we show that all PLA breakdown nanoplastics extended the survival rate in Daphnia magna in an acute toxicity assay, however, only PLA plastic cup breakdown nanoplastics showed a significant difference compared to a control group.