AAAR 31st Annual Conference
October 8-12, 2012
Hyatt Regency Minneapolis
Minneapolis, Minnesota, USA
Abstract View
Nanoparticle Emission from Engineered Nanostructured Materials Leading to Exposure and Risk
HEINZ FISSAN, Burkhard Stahlmecke, Christof Asbach, Thomas Kuhlbusch, Institute of Energy and Environmental Technology
Abstract Number: 80 Working Group: Aerosol Exposure
Abstract Nanostructured materials are increasingly incorporated in new products. They may release nanostructured materials into the environment during synthesis of nanostructured materials, product manufacturing and use as well as waste. Engineered nanoobjects are discussed to potentially cause adverse (health) effects, especially if they are released into the air and cause exposure of humans. Inhalation is seen as the major uptake route.
The starting point for balancing of released material flows is the amount of released nanoparticles per mass unit of nanostructured material. It can be considered to be a material property. Techniques with the capability of being standardized, based on different stress (energy input) situations have to be developed in order to reduce the tremendous variability of material stress cases. Besides defined stress cases, measurement techniques allowing for quantitative determination of nanoparticle release have to be used. The measures of interest (number, surface area, volume (mass)) depend on the physical and chemical processes occurring during the transport of the nanoparticles in the environment and in the effect system, and the kind of effect considered to be risky. Release is followed by the changes occurring during transport to the exposure point, described by the nanoparticle release-exposure relationship. This relationship can be modeled taking into account different exposure scenarios. Modeled material balances can be evaluated or controlled by measurements at different points of the material pathway.
We will report about a strategy towards measuring nanoparticle release properties of nanostructured materials to derive nanoparticle emission as a starting point for environmental material balancing towards exposure and dose. The measurement of the different needed concentration measures (number, surface area, volume(mass)) in form of size distributions will be critically considered.