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posted by janrinok on Tuesday September 20 2022, @04:02PM   Printer-friendly
from the nanoplastics-for-every-organism dept.

A new study from the University of Eastern Finland shows that lettuce can take up nanoplastics from the soil and transfer them into the food chain:

The concern about plastic pollution has become widespread after it was realised that mismanaged plastics in the environment break down into smaller pieces known as microplastics and nanoplastics. It is likely that nanoplastics, due to their small size, can pass through physiological barriers and enter organisms.

Despite the growing body of evidence on the potential toxicity of nanoplastics to plants, invertebrates and vertebrates, our understanding of plastic transfer in food webs is limited. For instance, little is known about nanoplastics in soil ecosystems and their uptake by soil organisms, despite the fact that agricultural soil is potentially receiving nanoplastics from different sources such as atmospheric deposition, irrigation with wastewater, application of sewage sludge for agricultural purposes, and use of mulching film. [...]

Researchers at the University of Eastern Finland have developed a novel, metallic fingerprint-based technique to detect and measure nanoplastics in organisms and, in this new study, they applied it to a model food chain consisting of three trophic levels, i.e., lettuce as a primary producer, black soldier fly larvae as a primary consumer, and the insectivorous fish (roach) as a secondary consumer. The researchers used commonly found plastic waste in the environment, including polystyrene (PS) and polyvinyl chloride (PVC) nanoplastics.

Lettuce plants were exposed to nanoplastics for 14 days via contaminated soil, after which they were harvested and fed to insects (black soldier fly larvae, which are used as a source of proteins in many countries). After five days of feeding with lettuce, the insects were fed to the fish for five days.

Using scanning electron microscopy, the researchers analysed the dissected plants, larvae and fish. The images showed that nanoplastics were taken up by the roots of the plants and accumulate in the leaves. Then, nanoplastics were transferred from the contaminated lettuce to the insects. [...] When the fish fed on the contaminated insects, particles were detected in the gills, liver and intestine tissues of the fish, whereas no particles were found in the brain tissue.

Journal Reference:
Fazel Abdolahpur Monikh, Sille Holm, Raine Kortet, et al. Quantifying the trophic transfer of sub-micron plastics in an assembled food chain [open]. Nano Today, 46, 2022. DOI: 10.1016/j.nantod.2022.101611


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  • (Score: 3, Informative) by DeathMonkey on Wednesday September 21 2022, @08:36PM (2 children)

    by DeathMonkey (1380) on Wednesday September 21 2022, @08:36PM (#1272871) Journal

    Yeah the new 'Crimes of the Future." (and I intended to post under the one about evolving to eat plastic)

    So multiple fails on that one!

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  • (Score: 2) by JoeMerchant on Wednesday September 21 2022, @08:56PM (1 child)

    by JoeMerchant (3937) on Wednesday September 21 2022, @08:56PM (#1272883)

    Looks worth the time, but maybe not worth the effort... probably not coming to Netflix :-(

    --
    🌻🌻 [google.com]
    • (Score: 3, Informative) by DeathMonkey on Wednesday September 21 2022, @09:29PM

      by DeathMonkey (1380) on Wednesday September 21 2022, @09:29PM (#1272886) Journal

      I'm sure it will eventually.

      Obviously I liked it. I was rolling my eyes a bit about the Cronenbergness at the beginning but they did a good job of explaining all the wackiness I thought.