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Gold nanoparticle biodissolution by a freshwater macrophyte and its associated microbiome.

Publication ,  Journal Article
Avellan, A; Simonin, M; McGivney, E; Bossa, N; Spielman-Sun, E; Rocca, JD; Bernhardt, ES; Geitner, NK; Unrine, JM; Wiesner, MR; Lowry, GV
Published in: Nature nanotechnology
November 2018

Predicting nanoparticle fate in aquatic environments requires mimicking of ecosystem complexity to observe the geochemical processes affecting their behaviour. Here, 12 nm Au nanoparticles were added weekly to large-scale freshwater wetland mesocosms. After six months, ~70% of Au was associated with the macrophyte Egeria densa, where, despite the thermodynamic stability of Au0 in water, the pristine Au0 nanoparticles were fully oxidized and complexed to cyanide, hydroxyls or thiol ligands. Extracted biofilms growing on E. densa leaves were shown to dissolve Au nanoparticles within days. The Au biodissolution rate was highest for the biofilm with the lowest prevalence of metal-resistant taxa but the highest ability to release cyanide, known to promote Au0 oxidation and complexation. Macrophytes and the associated microbiome thus form a biologically active system that can be a major sink for nanoparticle accumulation and transformations. Nanoparticle biotransformation in these compartments should not be ignored, even for nanoparticles commonly considered to be stable in the environment.

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Published In

Nature nanotechnology

DOI

EISSN

1748-3395

ISSN

1748-3387

Publication Date

November 2018

Volume

13

Issue

11

Start / End Page

1072 / 1077

Related Subject Headings

  • Water Microbiology
  • Plant Leaves
  • Nanoscience & Nanotechnology
  • Microbiota
  • Metal Nanoparticles
  • Gold
  • Fresh Water
  • Biofilms
  • Alismatales
 

Citation

APA
Chicago
ICMJE
MLA
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Avellan, A., Simonin, M., McGivney, E., Bossa, N., Spielman-Sun, E., Rocca, J. D., … Lowry, G. V. (2018). Gold nanoparticle biodissolution by a freshwater macrophyte and its associated microbiome. Nature Nanotechnology, 13(11), 1072–1077. https://doi.org/10.1038/s41565-018-0231-y
Avellan, Astrid, Marie Simonin, Eric McGivney, Nathan Bossa, Eleanor Spielman-Sun, Jennifer D. Rocca, Emily S. Bernhardt, et al. “Gold nanoparticle biodissolution by a freshwater macrophyte and its associated microbiome.Nature Nanotechnology 13, no. 11 (November 2018): 1072–77. https://doi.org/10.1038/s41565-018-0231-y.
Avellan A, Simonin M, McGivney E, Bossa N, Spielman-Sun E, Rocca JD, et al. Gold nanoparticle biodissolution by a freshwater macrophyte and its associated microbiome. Nature nanotechnology. 2018 Nov;13(11):1072–7.
Avellan, Astrid, et al. “Gold nanoparticle biodissolution by a freshwater macrophyte and its associated microbiome.Nature Nanotechnology, vol. 13, no. 11, Nov. 2018, pp. 1072–77. Epmc, doi:10.1038/s41565-018-0231-y.
Avellan A, Simonin M, McGivney E, Bossa N, Spielman-Sun E, Rocca JD, Bernhardt ES, Geitner NK, Unrine JM, Wiesner MR, Lowry GV. Gold nanoparticle biodissolution by a freshwater macrophyte and its associated microbiome. Nature nanotechnology. 2018 Nov;13(11):1072–1077.

Published In

Nature nanotechnology

DOI

EISSN

1748-3395

ISSN

1748-3387

Publication Date

November 2018

Volume

13

Issue

11

Start / End Page

1072 / 1077

Related Subject Headings

  • Water Microbiology
  • Plant Leaves
  • Nanoscience & Nanotechnology
  • Microbiota
  • Metal Nanoparticles
  • Gold
  • Fresh Water
  • Biofilms
  • Alismatales