The Effects Of Air Pollution On Human Health And The Natural Environment

1280 Words Jul 4th, 2015 6 Pages
INTRODUCTION
Worldwide, air pollution is a growing threat to human health and the natural environment. One of the major effects of air pollution is acid rain and it is caused by sulfur dioxide (SO2) and nitrogen oxides (NOx) gases. The combustion of high sulphur content fossil fuels can release harmful toxic gases into the air and therefore pose serious environmental problems. Coal, oil and natural gas are major energy resources available in environment where as fuel combustion processes and power plants are the largest contributor of these gases in the form of flue gas. Since coal and petroleum often contain sulphur compounds, their combustion generates SO2 unless the sulphur compounds are removed before burning the fuel. The gas exiting to the atmosphere through a flue, which is a pipe or channel for conveying exhaust gases from a fireplace, oven, furnace, boiler or steam generator. The flue gas refers to the combustion exhaust gas produced at power plants. It contains a small percentage of a number of pollutants, such as particulate matter, carbon monoxide, carbon dioxide, NOx and SO2. A typical composition of coal-fired power plant flue gas contains about 500–2000 ppm of SO2 and over 125 ppm of NOx1. Coal is the most common solid fuel for worldwide energy production. Table 1 shows the typical compositions of the components generally found in coal, which depends on the geological transformation degree of the organic matter 2.

Sulphur Dioxide and Sulphuric Acid Vapor…

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