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Ecotoxicity testing of micro- and nano-plastics

Date:
October 10, 2023
Source:
University of Eastern Finland
Summary:
An international team of researchers has published the first harmonized exposure protocol for ecotoxicity testing of microplastics and nanoplastics.
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Published in Nature Protocols and led by the University of Eastern Finland, an international team of researchers has published the first harmonized exposure protocol for ecotoxicity testing of microplastics and nanoplastics.

Plastic pollution has become a significant environmental and human health issue at a global scale. Yet, despite increasing concern over the harmful effects of micro- and nano-plastics (MNPs), no harmonized guidelines or protocols for their ecotoxicity testing have been available to date. Current ecotoxicity studies often use commercial spherical particles as models for MNPs, but in nature, MNPs occur in variable shapes, sizes and chemical compositions. Moreover, protocols developed for chemicals that dissolve or form stable dispersions are currently used for assessing the ecotoxicity of MNPs, but these protocols are not optimal for studying MNPs, as plastic particles do not dissolve and also show dynamic behaviour in the exposure medium, depending on, for example, MNP physicochemical properties and the medium's ionic strength.

The new exposure protocol considers the particle-specific properties of MNPs and their dynamic behaviour in exposure systems. The protocol enables, e.g., the production of more realistic MNPs that resemble those occurring in nature. The protocol also describes exposure system development for short- and long-term toxicity tests for soil and water organisms.

The researchers provide examples of using the protocol to test, for example, MNP toxicity in marine rotifers, freshwater mussels, daphnids and earthworms. The present protocol takes between 24 h and 2 months, depending on the test of interest, and can be applied by students, academics, environmental risk assessors and industries.


Story Source:

Materials provided by University of Eastern Finland. Note: Content may be edited for style and length.


Journal Reference:

  1. Fazel Abdolahpur Monikh, Anders Baun, Nanna B. Hartmann, Raine Kortet, Jarkko Akkanen, Jae-Seong Lee, Huahong Shi, Elma Lahive, Emilia Uurasjärvi, Nathalie Tufenkji, Korinna Altmann, Yosri Wiesner, Hans-Peter Grossart, Willie Peijnenburg, Jussi V. K. Kukkonen. Exposure protocol for ecotoxicity testing of microplastics and nanoplastics. Nature Protocols, 2023; DOI: 10.1038/s41596-023-00886-9

Cite This Page:

University of Eastern Finland. "Ecotoxicity testing of micro- and nano-plastics." ScienceDaily. ScienceDaily, 10 October 2023. <www.sciencedaily.com/releases/2023/10/231010105320.htm>.
University of Eastern Finland. (2023, October 10). Ecotoxicity testing of micro- and nano-plastics. ScienceDaily. Retrieved April 13, 2024 from www.sciencedaily.com/releases/2023/10/231010105320.htm
University of Eastern Finland. "Ecotoxicity testing of micro- and nano-plastics." ScienceDaily. www.sciencedaily.com/releases/2023/10/231010105320.htm (accessed April 13, 2024).

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