Understanding Acidic Precipitation or Acid Rain

About acid rain and acid rain Our atmosphere is the life ecology of chemical reactions. With the help of water circulation, chemical substances pass through the atmosphere and eventually are absorbed by soil, surface water or organic matter. Man has greatly increased the burden on the atmosphere of many toxic substances. The most obvious evidence is the presence of acid rain: sediments and particles that become acidic due to air pollution. Acid rain is a direct effect of atmospheric self-cleaning process.

Acid, usually nitric acid and sulfuric acid are released from the atmosphere to form a precipitate, acid rain precipitates. This brings the pH of the precipitate below the normal level. Acid rain is mainly caused by human influence on the earth, but there are also some natural sources. About two thirds of sulfur dioxide and one quarter of nitrous oxide are released into the atmosphere by combustion of fossil fuels such as coal, oil and natural gas. Acid rain occurs when these chemical contaminants react with oxygen and water vapor in the air to form nitric acid and sulfuric acid. These acids can be combined directly with the precipitation of their sources. However, they usually follow the prevailing wind and return to the ground through acid rain hundreds of miles away.

Acid rain is the product of the interaction between nitric acid and sulfuric acid air and atmospheric water molecules. The term "acid rain" or "acid precipitation" refers to a wet deposition process that precipitates acid from the atmosphere in the form of rain or snow in a manner that allows the acid to fall onto the surface of the earth. Alternatively, atmospheric acids may be present at the surface level without any acid from wet deposition where they adhere to plants, ground structures or man-made structures. Dry film formation

When sulfur dioxide and nitrogen oxides mix with atmospheric water, oxygen and other chemicals, acidic dioxide falls, causing a mild acidic deposit such as rain. Acid rain increases the acidity of lakes and streams. It is harmful to fish and other aquatic life. It can also destroy trees and weaken the forest ecosystem. Particulate matter (soot) causes chronic bronchitis, exacerbates asthma and releases haze that can cause premature death. It is estimated that in 2010, particulate contamination of US coal-fired power plants caused 13,200 deaths, 9,700 hospitalizations, and 20,000 heart attacks. The influence of young people, elderly people and people with respiratory illness is particularly serious. Estimated annual gross medical expenses exceed $ 100 billion