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LECTURE NOTES. For Environmental Health Science Students. Air Pollution. Mengesha Admassu,. Mamo Wubeshet. University of Gondar. In collaboration with the Ethiopia Public Health Training Initiative, The Carter Center, the Ethiopia Ministry of Health, and the Ethiopia Ministry of Education. August 2006
eration and control of air pollutants at their source, which we refer to as air pollution engineering. 1.1 AIR POLLUTANTS. Table 1.1 summarizes species classified as air pollutants. By and large our focus in this book is on the major combustion-generated compounds, such as the oxides of nitrogen, sulfur dioxide, carbon
Full-text (PDF) | Dispersion and emission of pollutants into the air is controlled by the prevaling meteorological conditions like wind profile, temperature profile and stability of the atmosphere. Air pollution dispersion models attempt to express the interrelationships of these factors in terms
gases, liquid drops, or solid particles. • Measurable effects on humans and environment due to: • 'indoor' air pollutants ,. • air toxics, radioactivity. • urban photochemical smog,. • acid rain, visibility reduction,. • greenhouse warming,. • depletion of the ozone layer,. • climate forcing due to anthropogenic atmospheric aerosols. 3.
(2) anthropogenic (i.e., those produced by human activ- ities); and (3) secondary (i.e., those formed in the atmo- sphere from natural and anthropogenic air pollutants). Each of these three categories of air pollutants can be further subdivided. For example, anthropogenic pollutant sources can be classified as stationary, (e.g.,
Classification of air pollutants : The air pollutants are classified according to chemical composition. The main primary pollutants in photochemical smog are nitric oxide and hydrocarbons, which are rapidly coverted to secondary pollutants, Ozone, Organic nitrates, S.
Gravity removes coarse and supercoarse particles. Stoke's law: rate of settling is proportional to the density of the particle and the square of it's radius. • “Fine particulates can remain suspended for weeks and can be transported thousands of kilometers." (Federal Register). • Developing showers and thunderstorms consume
Classification of Air Pollution: 8 Marks. Primary and Secondary Pollutants. Primary Pollutant: Air Pollution can be classified as primary and secondary pollutants. Primary pollutants are substances that are directly emitted into the atmosphere from sources. The main primary pollutants known to cause harm in high enough
An air pollutant is a substance in the air that can have adverse effects on humans and the ecosystem. The substance can be solid particles, liquid droplets, or gases. A pollutant can be of natural origin or man-made. Pollutants are classified as primary or secondary. Primary pollutants are usually produced from a process,
Air pollutants can be arbitrarily classified according to chemical composition as (1) inorganic air pollutants and (ii) organic air pollutants. • The following inorganic air pollutants are discussed in this chapter. • Oxides of carbon (eg., CO and CO2) even though carbondioxide is a natural and essential constituent of atmosphere,

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March 2018