A Novel System for Source Characterization and Controlled Human Exposure to Nanoparticle Aggregates Generated During Gas-Metal Arc Welding

The aim of this study was to achieve a method to perform detailed characterization and human exposure studies of nanosized and nanostructured aerosol particles. The source chosen was mild steel, active gas, arc welding fume. The setup consisted of a generation chamber, where welding can be performed...

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Bibliographic Details
Published in:Aerosol science and technology 2013-01, Vol.47 (1), p.52-59
Main Authors: Isaxon, C., Dierschke, K., Pagels, J., Löndahl, J., Gudmundsson, A., Hagerman, I., Berglund, M., Wierzbicka, A., Assarsson, E., Andersson, U. B., Jönsson, B. A. G., Messing, M. E., Nielsen, J., Bohgard, M.
Format: Article
Language:English
Subjects:
Aerosols
Aggregates
Arc welding
Atmospheric aerosols
Chambers
Chemical Sciences
Chemistry
Colloidal state and disperse state
Exact sciences and technology
Exposure
Fysikalisk kemi
General and physical chemistry
Human
Human exposure
Kemi
Medicin och hälsovetenskap
Microbalances
Nanoparticles
Nanostructure
Natural Sciences
Naturvetenskap
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Physical Chemistry
Scanning electron microscopy
Stainless steel
Stainless steels
Transmission electron microscopy
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Summary:The aim of this study was to achieve a method to perform detailed characterization and human exposure studies of nanosized and nanostructured aerosol particles. The source chosen was mild steel, active gas, arc welding fume. The setup consisted of a generation chamber, where welding can be performed, connected to an airtight stainless steel 22 m 3 exposure chamber. Instrumentation, consisting of a tapered element oscillating microbalance, a scanning mobility particle sizer, and a sampler for electron microscopy and particle-induced X-ray emission analysis was connected to the stainless steel chamber. The feasibility of the system for human exposure studies was evaluated by exposing 31 human volunteers, in groups of three, to a test aerosol containing 1 mg/m 3 welding fumes and to conditioned, filtered air. The results show that an aerosol that accurately represents dilute welding fume exposures that occur in workplaces can be produced in a controlled manner, and that the experimental setup can be used for 6 h, double-blind, exposures of human subjects. Particle mass concentration levels could be varied from
ISSN:0278-6826
1521-7388
1521-7388
DOI:10.1080/02786826.2012.724733