ENSC 201 Lecture Notes - Lecture 12: National Ambient Air Quality Standards, Tetraethyllead, Air Quality Index
13 Apr 2017
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Document Summary
Working definition of atmospheric pollution: substances that are released into the atmosphere, deliberately or inadvertently, from natural or anthropogenic sources and that have the potential to be toxic or cause harm. Types of compounds that contribute to air pollution. Gases - ch4 co co2 so2 nox vocs - some chlorinated hydrocarbons and btex dimethylmercury. Aersols - sulphates, fine droplets of organic material. Particles - soot (carbon), various oxides and salts of metals and other inorganics, chemical mixtures of particles with organic substances adsorbed onto them. Goals for regulation and risk management for atmospheric pollutants. In order to control, regulate or remove sources of atmospheric pollution, a clear scientific understanding of the physical, chemical and biological processes involved is essential with assessment and management of risk. In ecotoxicology, any assessment of the ultimate effect of an environment pollutants must involve a four-part process. Transport into biota - with or without chemical transformation.
