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Stealth microplastics pollutants: Toxicological evaluation of polyethylene terephthalate-based glitters on the microalga Desmodesmus sp. and its color effect

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Abstract

Polyethylene terephthalate-based glitters (PET glitters) are a potential source of primary microplastics in the environment. However, the bioeffects of PET glitters and the associated leachates remain largely unknown. In this study, we investigated the individual and combined toxicity of five colors (silver, black, red, green, and blue) of PET glitters and their corresponding leachates on the cellular responses of Desmodesmus sp. The results indicated that the photosynthesis of Desmodesmus sp. could be partly affected by PET glitters through the shading effect, but not that of growth. Conversely, the leachates of red and green PET glitters significantly inhibited the growth of the microalga, suggesting a higher risk associated with additives leached from these colors of PET glitters. Furthermore, the adverse effects of the co-occurrence of PET glitters and leachates were closely related to oxidative stress responses in the microalgal cells, along with a color effect, which could be mainly attributed to variations in the composition and abundance of toxic additives in different colors of PET glitters. Overall, our findings provide insights into the ecological risks posed by glitters in aquatic environments and emphasize the importance of considering color factors in assessing microplastics toxicity.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 32171625 and No. 42076138).

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Chun Wang: Investigation, Writing-Original Draft.

Lijuan Jiang: Investigation.

Yaru Zhang: Investigation.

Changhai Wang: Conceptualization, Funding acquisition, Project administration, Writing-Review & Editing.

Meilin He: Conceptualization, Funding acquisition, Supervision, Writing-Review & Editing.

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Correspondence to Meilin He.

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Wang, C., Jiang, L., Zhang, Y. et al. Stealth microplastics pollutants: Toxicological evaluation of polyethylene terephthalate-based glitters on the microalga Desmodesmus sp. and its color effect. Environ Sci Pollut Res 30, 95975–95987 (2023). https://doi.org/10.1007/s11356-023-29147-8

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  • DOI: https://doi.org/10.1007/s11356-023-29147-8

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