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Combined toxicity of polyethylene microplastics and nickel oxide nanoparticle on earthworm (Eisenia andrei): oxidative stress responses, bioavailability and joint effect

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Abstract

The co-occurrence of heavy metals and microplastics (MPs) is an emerging issue that has attracted considerable attention. However, the interaction of nickel oxide nanoparticle (nano-NiO) combined with MPs in soil was poorly researched. Here, experiments were conducted to study the influence of nano-NiO (200 mg/kg) and polyethylene (PE) MPs with different concentrations (0.1, 1, and 10%) and sizes (13, 50, and 500 µm) on earthworms for 28 days. Compared to control, the damage was induced by PE and nano-NiO, which was evaluated by biomarker Integrated Biomarker Response index: version 2 (IBRv2) based on six biomarkers including SOD, POD, CAT, MDA, AChE, Na+/K+-ATPase and cellulase. The majority of the chosen biomarkers showed significant but complicated responses with increasing contaminant concentrations after 28 days of exposure. Moreover, the joint effect was assessed as antagonism by the effect addition index (EAI). Overall, this work expands our understanding of the combined toxicity of PE and nano-NiO in soil ecosystems.

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Data availability

The data that support the findings of this study are available from the corresponding author (Zaifu Yang) upon reasonable request.

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Acknowledgements

The authors declare they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. This work was supported by the China Huadian Corporation LTD. (NO: JS-BT-FW/QT-006).

Funding

This work was supported by the China Huadian Corporation LTD. (NO: JS-BT-FW/QT-006).

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Contributions

Xinyue Tian has drafted the work and revised it critically for important intellectual content. Zaifu Yang has made substantial contributions to the conception or design of the work. Wenjun Shu, Yiran Yang, Jingyao Xu and Simeng Kan provided technical support in chart making and helped prepare the experimental materials. All authors read and approved the final manuscript.

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Correspondence to Zaifu Yang.

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Ethical approval

No human trials were involved in this study. Authors thank earthworms for their sacrifice. All applicable international, national, and institutional guidelines for the care and use of animals were followed.

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All authors agreed to participate in this experiment.

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All authors agreed to publish this article.

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The authors have no relevant financial or non-financial interests to disclose.

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Yang, Z., Tian, X., Shu, W. et al. Combined toxicity of polyethylene microplastics and nickel oxide nanoparticle on earthworm (Eisenia andrei): oxidative stress responses, bioavailability and joint effect. Environ Sci Pollut Res (2024). https://doi.org/10.1007/s11356-024-33512-6

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  • DOI: https://doi.org/10.1007/s11356-024-33512-6

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