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- W1990951587 abstract "To investigate the toxicity of particles originating from coal-fired power plants it is necessary to consider the effects of both primary particles and secondary components formed in the air through atmospheric reactions. This report describes a new exposure system that can be used to expose animals to both directly emitted particles and to secondary particles. The system consists of three main components. The first is a sampling system to continuously collect and dilute power plant stack emissions. The second is a reaction laboratory that contains reaction chambers to simulate atmospheric reactions. The following atmospheric reactions were simulated: (1) the oxidation of sulfur dioxide to form sulfuric acid, (2) the neutralization of sulfuric acid by ammonia, and (3) the reaction of alpha-pinene with ozone to form secondary organic aerosol. Using these chambers with the diluted emissions, different typical atmospheric scenarios can be simulated. The final component is a mobile toxicology laboratory where animals are exposed to the resulting test aerosols. We report here the characteristics of the test aerosol exposures obtained at a coal-fired electric power plant. Particle exposures were characterized for concentrations of mass, elements, elemental carbon, organic species, inorganic ions, strong acidity, particle number, and size distributions. Mass concentrations ranged from a few micrograms per cubic meter for a scenario of primary emissions only, to about 250 microg m(-3) for the most complex scenario. We show that the different scenarios produced a large variation in the composition of the test aerosol, thus potentially changing the toxicity of the emissions." @default.
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- W1990951587 date "2007-01-01" @default.
- W1990951587 modified "2023-09-25" @default.
- W1990951587 title "Development of an Exposure System for the Toxicological Evaluation of Particles Derived from Coal-Fired Power Plants" @default.
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- W1990951587 doi "https://doi.org/10.1080/08958370701353148" @default.
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