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Fate, uptake, and distribution of nanoencapsulated pesticides in soil–earthworm systems and implications for environmental risk assessment


Mohd Anuar, Mohd Firdaus and Agatz, Annika and Hodson, Mark E. and Al-Khazrajy, Omar S. A. and Boxall, Alistair B. A. (2018) Fate, uptake, and distribution of nanoencapsulated pesticides in soil–earthworm systems and implications for environmental risk assessment. Environmental Toxicology and Chemistry, 37 (5). pp. 1420-1429. ISSN 0730-7268; ESSN: 1552-8618


Nanopesticides are novel plant protection products offering numerous benefits. Because nanoparticles behave differently from dissolved chemicals, the environmental risks of these materials could differ from conventional pesticides. We used soil-earthworm systems to compare the fate and uptake of analytical-grade bifenthrin to that of bifenthrin in traditional and nanoencapsulated formulations. Apparent sorption coefficients for bifenthrin were up to 3.8 times lower in the nano treatments than in the non-nano treatments, whereas dissipation half-lives of the nano treatments were up to 2 times longer. Earthworms in the nano treatments accumulated approximately 50% more bifenthrin than those in the non-nano treatments. In the non-nano treatments, most of the accumulated material was found in the earthworm tissue, whereas in the nano treatments, the majority resided in the gut. Evaluation of toxicokinetic modeling approaches showed that models incorporating the release rate of bifenthrin from the nanocapsule and distribution within the earthworm provided the best estimations of uptake from the nano-formulations. Overall, our findings indicate that the risks of nanopesticides may be different from those of conventional formulations. The modeling presented provides a starting point for assessing risks of these materials but needs to be further developed to better consider the behavior of the nanoencapsulated pesticide within the gut system.

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Official URL or Download Paper: https://pubmed.ncbi.nlm.nih.gov/29341233/

Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
DOI Number: https://doi.org/10.1002/etc.4094
Publisher: Wiley
Keywords: Earthworms; Eisenia fetida; Lumbricus terrestris; Nanoencapsulation; Nanopesticides; Synthetic pyrethroids; Toxicokinetic modeling
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 30 Jan 2021 02:11
Last Modified: 30 Jan 2021 02:11
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1002/etc.4094
URI: http://psasir.upm.edu.my/id/eprint/72739
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