A novel method for assessing microplastic effect in suspension through mixing test and reference materials.
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The occurrence of microplastic in the environment is of global concern. However, the microplastic hazard assessment is hampered by a lack of adequate ecotoxicological methods because of conceptual and practical problems with particle exposure. In the environment, suspended solids (e.g., clay and cellulose) in the same size range as microplastic, are ubiquitous. Therefore, it must be established whether the addition of microplastic to these background levels of particulate material represents a hazard. We present a novel approach employing a serial dilution of microplastic and reference particles, in mixtures, which allows disentangling the effect of the microplastic from that of the other particulates. We demonstrate the applicability of the method using an immobilization test with Daphnia magna exposed to polyethylene terephthalate (test microplastic; median particle diameter ~5 μm) and kaolin clay (reference material; ~3 μm). In the range of the suspended solids test concent.....
Sustainable Development Goals (SDG)14
Maturity LevelTRL 4 Component/subsystem validation in laboratory environment
Best Practice TypeManual (incl. handbook, guide, cookbook etc)
CitationGerdes, Z.; Hermann, M.; Ogonowski, M. et al. (2019) A novel method for assessing microplastic effect in suspension through mixing test and reference materials. Scientific Reports, 9:10695, 9pp. DOI: https://doi.org/10.1038/s41598-019-47160-1
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