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Pd Particles as Standardized Test Material for Bioavailability Studies of Traffic Related Pd Emissions to Barley Plants

  • Kerstin LeopoldEmail author
  • Michael Schuster
Chapter
Part of the Environmental Science and Engineering book series (ESE)

Abstract

Model palladium particles similar to those emitted from catalytic car exhaust converters were prepared and characterized with the intention of providing standardized material for investigation of the chemical behaviour and bioavailability of traffic related Pd emissions. Three types of Pd particles—Pd nanoparticles dispersed on silica support particles (Pd/SiO2), Pd only nanoparticles (Pd-NPs) and Pd micrometer particles (Pd-MPs)—were prepared and characterized in detail by transmission electron microscopy (TEM), high resolution (HR)-TEM, selective area diffraction (SAD), laser granulometry and graphite furnace atomic absorption spectrometry (GFAAS). The optimized preparation procedures yield in elemental particles with narrow size distributions of 2–4 nm (on SiO2-support), 5–10 nm or 0.5–5 μm, respectively for Pd particle. These particles were applied in uptake studies with barley plants raised for 2 weeks in culture medium spiked with different Pd concentrations. Highest Pd uptake was observed with plants exposed to Pd-NPs, lowest uptake with plants exposed to Pd/SiO2. With increasing Pd exposure concentration significant decrease in the plant growth and in the potassium and calcium content of the plants was found.

Keywords

Ultra Pure Water Selective Area Diffraction Barley Plant Graphite Furnace Atomic Absorption Spectrometry Nutrient Salt 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors are very grateful to Dr. Florian Battke (German Research Center for Environmental Heath, Institute of Biochemical Plant Pathology, Neuherberg, Germany) for raising the barley plants.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  1. 1.Arbeitsgruppe Analytische ChemieTechnische Universität MünchenGarchingGermany

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