Skip to main content
Journal cover image

Long-Term Transformation and Fate of Manufactured Ag Nanoparticles in a Simulated Large Scale Freshwater Emergent Wetland.

Publication ,  Journal Article
Lowry, GV; Espinasse, BP; Badireddy, AR; Richardson, CJ; Reinsch, BC; Bryant, LD; Bone, AJ; Deonarine, A; Chae, S; Therezien, M; Colman, BP ...
Published in: Environmental science & technology
April 2012

Transformations and long-term fate of engineered nanomaterials must be measured in realistic complex natural systems to accurately assess the risks that they may pose. Here, we determine the long-term behavior of poly(vinylpyrrolidone)-coated silver nanoparticles (AgNPs) in freshwater mesocosms simulating an emergent wetland environment. AgNPs were either applied to the water column or to the terrestrial soils. The distribution of silver among water, solids, and biota, and Ag speciation in soils and sediment was determined 18 months after dosing. Most (70 wt %) of the added Ag resided in the soils and sediments, and largely remained in the compartment in which they were dosed. However, some movement between soil and sediment was observed. Movement of AgNPs from terrestrial soils to sediments was more facile than from sediments to soils, suggesting that erosion and runoff is a potential pathway for AgNPs to enter waterways. The AgNPs in terrestrial soils were transformed to Ag(2)S (∼52%), whereas AgNPs in the subaquatic sediment were present as Ag(2)S (55%) and Ag-sulfhydryl compounds (27%). Despite significant sulfidation of the AgNPs, a fraction of the added Ag resided in the terrestrial plant biomass (∼3 wt % for the terrestrially dosed mesocosm), and relatively high body burdens of Ag (0.5-3.3 μg Ag/g wet weight) were found in mosquito fish and chironomids in both mesocosms. Thus, Ag from the NPs remained bioavailable even after partial sulfidation and when water column total Ag concentrations are low (

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Environmental science & technology

DOI

ISSN

1520-5851

Publication Date

April 2012

Related Subject Headings

  • Wetlands
  • Water Pollutants, Chemical
  • Soil
  • Silver
  • Povidone
  • Plants
  • Oxidation-Reduction
  • Nanoparticles
  • Motion
  • Insecta
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Lowry, G. V., Espinasse, B. P., Badireddy, A. R., Richardson, C. J., Reinsch, B. C., Bryant, L. D., … Wiesner, M. R. (2012). Long-Term Transformation and Fate of Manufactured Ag Nanoparticles in a Simulated Large Scale Freshwater Emergent Wetland. Environmental Science & Technology. https://doi.org/10.1021/es204608d
Lowry, G. V., B. P. Espinasse, A. R. Badireddy, C. J. Richardson, B. C. Reinsch, L. D. Bryant, A. J. Bone, et al. “Long-Term Transformation and Fate of Manufactured Ag Nanoparticles in a Simulated Large Scale Freshwater Emergent Wetland.Environmental Science & Technology, April 2012. https://doi.org/10.1021/es204608d.
Lowry GV, Espinasse BP, Badireddy AR, Richardson CJ, Reinsch BC, Bryant LD, et al. Long-Term Transformation and Fate of Manufactured Ag Nanoparticles in a Simulated Large Scale Freshwater Emergent Wetland. Environmental science & technology. 2012 Apr;
Lowry, G. V., et al. “Long-Term Transformation and Fate of Manufactured Ag Nanoparticles in a Simulated Large Scale Freshwater Emergent Wetland.Environmental Science & Technology, Apr. 2012. Manual, doi:10.1021/es204608d.
Lowry GV, Espinasse BP, Badireddy AR, Richardson CJ, Reinsch BC, Bryant LD, Bone AJ, Deonarine A, Chae S, Therezien M, Colman BP, Hsu Kim H, Bernhardt ES, Matson CW, Wiesner MR. Long-Term Transformation and Fate of Manufactured Ag Nanoparticles in a Simulated Large Scale Freshwater Emergent Wetland. Environmental science & technology. 2012 Apr;
Journal cover image

Published In

Environmental science & technology

DOI

ISSN

1520-5851

Publication Date

April 2012

Related Subject Headings

  • Wetlands
  • Water Pollutants, Chemical
  • Soil
  • Silver
  • Povidone
  • Plants
  • Oxidation-Reduction
  • Nanoparticles
  • Motion
  • Insecta