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Differential Reactivity of Copper- and Gold-Based Nanomaterials Controls Their Seasonal Biogeochemical Cycling and Fate in a Freshwater Wetland Mesocosm.

Publication ,  Journal Article
Avellan, A; Simonin, M; Anderson, SM; Geitner, NK; Bossa, N; Spielman-Sun, E; Bernhardt, ES; Castellon, BT; Colman, BP; Cooper, JL; Ho, M ...
Published in: Environmental science & technology
February 2020

Reliable predictions of the environmental fate and risk of engineered nanomaterials (ENMs) require a better understanding of ENM reactivity in complex, biologically active systems for chronic low-concentration exposure scenarios. Here, simulated freshwater wetland mesocosms were dosed with ENMs to assess how their reactivity and seasonal changes in environmental parameters influence ENM fate in aquatic systems. Copper-based ENMs (Kocide), known to dissolve in water, and gold nanoparticles (AuNPs), stable against dissolution in the absence of specific ligands, were added weekly to mesocosm waters for 9 months. Metal accumulation and speciation changes in the different environmental compartments were assessed over time. Copper from Kocide rapidly dissolved likely associating with organic matter in the water column, transported to terrestrial soils and deeper sediment where it became associated with organic or sulfide phases. In contrast, Au accumulated on/in the macrophytes where it oxidized and transferred over time to surficial sediment. A dynamic seasonal accumulation and metal redox cycling were found between the macrophyte and the surficial sediment for AuNPs. These results demonstrate the need for experimental quantification of how the biological and chemical complexity of the environment, combined with their seasonal variations, drive the fate of metastable ENMs.

Duke Scholars

Published In

Environmental science & technology

DOI

EISSN

1520-5851

ISSN

0013-936X

Publication Date

February 2020

Volume

54

Issue

3

Start / End Page

1533 / 1544

Related Subject Headings

  • Wetlands
  • Seasons
  • Nanostructures
  • Metal Nanoparticles
  • Gold
  • Fresh Water
  • Environmental Sciences
  • Copper
 

Citation

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Avellan, A., Simonin, M., Anderson, S. M., Geitner, N. K., Bossa, N., Spielman-Sun, E., … Lowry, G. V. (2020). Differential Reactivity of Copper- and Gold-Based Nanomaterials Controls Their Seasonal Biogeochemical Cycling and Fate in a Freshwater Wetland Mesocosm. Environmental Science & Technology, 54(3), 1533–1544. https://doi.org/10.1021/acs.est.9b05097
Avellan, Astrid, Marie Simonin, Steven M. Anderson, Nicholas K. Geitner, Nathan Bossa, Eleanor Spielman-Sun, Emily S. Bernhardt, et al. “Differential Reactivity of Copper- and Gold-Based Nanomaterials Controls Their Seasonal Biogeochemical Cycling and Fate in a Freshwater Wetland Mesocosm.Environmental Science & Technology 54, no. 3 (February 2020): 1533–44. https://doi.org/10.1021/acs.est.9b05097.
Avellan A, Simonin M, Anderson SM, Geitner NK, Bossa N, Spielman-Sun E, et al. Differential Reactivity of Copper- and Gold-Based Nanomaterials Controls Their Seasonal Biogeochemical Cycling and Fate in a Freshwater Wetland Mesocosm. Environmental science & technology. 2020 Feb;54(3):1533–44.
Avellan, Astrid, et al. “Differential Reactivity of Copper- and Gold-Based Nanomaterials Controls Their Seasonal Biogeochemical Cycling and Fate in a Freshwater Wetland Mesocosm.Environmental Science & Technology, vol. 54, no. 3, Feb. 2020, pp. 1533–44. Epmc, doi:10.1021/acs.est.9b05097.
Avellan A, Simonin M, Anderson SM, Geitner NK, Bossa N, Spielman-Sun E, Bernhardt ES, Castellon BT, Colman BP, Cooper JL, Ho M, Hochella MF, Hsu-Kim H, Inoue S, King RS, Laughton S, Matson CW, Perrotta BG, Richardson CJ, Unrine JM, Wiesner MR, Lowry GV. Differential Reactivity of Copper- and Gold-Based Nanomaterials Controls Their Seasonal Biogeochemical Cycling and Fate in a Freshwater Wetland Mesocosm. Environmental science & technology. 2020 Feb;54(3):1533–1544.
Journal cover image

Published In

Environmental science & technology

DOI

EISSN

1520-5851

ISSN

0013-936X

Publication Date

February 2020

Volume

54

Issue

3

Start / End Page

1533 / 1544

Related Subject Headings

  • Wetlands
  • Seasons
  • Nanostructures
  • Metal Nanoparticles
  • Gold
  • Fresh Water
  • Environmental Sciences
  • Copper