Synthesis of isotopically modified ZnO nanoparticles and their potential as nanotoxicity tracers

Synthesis of isotopically modified ZnO nanoparticles and their potential as nanotoxicity tracers Understanding the behavior of engineered nanoparticles in the environment and within organisms is perhaps the biggest obstacle to the safe development of nanotechnologies. Reliable tracing is a particular issue for nanoparticles such as ZnO, because Zn is an essential element and a common pollutant thus present at elevated background concentrations. We synthesized isotopically enriched (89.6%) with a rare isotope of Zn (67Zn) ZnO nanoparticles and measured the uptake of 67Zn by L. stagnalis exposed to diatoms amended with the particles. Stable isotope technique is sufficiently sensitive to determine the uptake of Zn at an exposure equivalent to lower concentration range (<15gg1). Without a tracer, detection of newly accumulated Zn is significant at Zn exposure concentration only above 5000gg1 which represents some of the most contaminated Zn conditions. Only by using a tracer we can study Zn uptake at a range of environmentally realistic exposure conditions. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Environmental Pollution Elsevier

Synthesis of isotopically modified ZnO nanoparticles and their potential as nanotoxicity tracers

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Publisher
Elsevier
Copyright
Copyright © 2010 Elsevier Ltd
ISSN
0269-7491
D.O.I.
10.1016/j.envpol.2010.08.032
Publisher site
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Abstract

Understanding the behavior of engineered nanoparticles in the environment and within organisms is perhaps the biggest obstacle to the safe development of nanotechnologies. Reliable tracing is a particular issue for nanoparticles such as ZnO, because Zn is an essential element and a common pollutant thus present at elevated background concentrations. We synthesized isotopically enriched (89.6%) with a rare isotope of Zn (67Zn) ZnO nanoparticles and measured the uptake of 67Zn by L. stagnalis exposed to diatoms amended with the particles. Stable isotope technique is sufficiently sensitive to determine the uptake of Zn at an exposure equivalent to lower concentration range (<15gg1). Without a tracer, detection of newly accumulated Zn is significant at Zn exposure concentration only above 5000gg1 which represents some of the most contaminated Zn conditions. Only by using a tracer we can study Zn uptake at a range of environmentally realistic exposure conditions.

Journal

Environmental PollutionElsevier

Published: Jan 1, 2011

References

  • Comparative eco toxicity of nanoscale TiO2, SiO2, and ZnO water suspensions
    Adams, L.K.; Lyon, D.Y.; Alvarez, P.J.J.
  • Auto-catalytic ceria nanoparticles offer neuroprotection to adult rat spinal cord neurons
    Das, M.; Patil, S.; Bhargava, N.; Kang, J.-F.; Riedel, L.M.; Seal, S.; Hickman, J.J.
  • Polyol-mediated synthesis of nanoscale functional materials
    Feldmann, C.
  • Ecotoxicological responses of the mayfly Baetis tricaudatus to dietary and waterborne cadmium: implications for toxicity testing
    Irving, E.C.; Baird, D.J.; Culp, J.M.
  • Neutron activation of engineered nanoparticles as a tool for tracing their environmental fate and uptake in organisms
    Oughton, D.H.; Hertel-Aas, T.; Pellicer, E.; Mendoza, E.; Joner, E.J.
  • Structural and optical characterization of undoped, doped and clustered ZnO thin films obtained by PLD for gas sensing applications
    Ristoscu, C.; Caiteanu, D.; Prodan, G.; Socol, G.; Grigorescu, S.; Axente, E.; Stefan, N.; Ciupina, V.; Aldica, G.; Mihailescu, I.N.

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