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Tuesday, July 20, 2010

SO2 layer and the dangers to health

SO2 has a strong influence on the acute and chronic health. in the form of gas, SO2 can irritate the respiratory system; at high exposures (short time) affects lung function.

H2SO4 SO2 is a by-product that affects the respiratory system. Compounds, consisting of ammonium salts or organosulfat polinuklir, affecting the alveoli and working as a soluble chemicals, they passed through the mucous membranes of the respiratory system in living organisms.

Particulate aerosols formed by gas to particle formation was found to join with the many health effects.

Globally, the sulfur compounds in large enough quantities into the atmosphere by human activity around 100 million metric tons of sulfur each year, primarily as a SO2 from burning coal and gasoline combustion exhaust gases. Large quantities of sulfur compounds are also produced by volcanic activity in the form of H2S, the process of reform of organic matter, sulfate reduction and biological significance. The number generated by these biological processes can reach more one million metric tons of H2S per year.

Most of the H2S that reaches the atmosphere quickly changed to SO2 through the reaction:

H2S + 3 / 2 O2 + H2O SO2

reaction began with the release of hydrogen ions by hydroxyl radicals,

HO-H2S + HS-+ H2O

followed by the following reaction to produce SO2

HS-+ O2 + HO-SO

SO2 + O2 SO + O

Almost half of the sulfur contained in coal in the form pyrit, FeS2, and the other half in the form of organic sulfur. Sulfur dioxide is produced by changes pyrit through the following reaction:

4FeS2 + 11O2 2 Fe2O3 + 8 SO2

Basically, all the sulfur that enters the atmosphere changed in the form of SO2 and only 1% or 2%, just as SO2

Although SO2 generated by human activities is only a small part of the existing SO2 diatmosfer, but its influence is very serious because it directly SO2 can poison creatures around it. Existing SO2 diatmosfer pernapasandan tract irritants increase mucus secretion. People who have weak breathing is very sensitive to high SO2 content diatmosfer. With a concentration of 500 ppm of SO2 can cause death in humans.

High pollution by SO2 has caused serious havoc. As happened in the valley Nerse Belgium in 1930, reaching levels of 38 ppm SO2 in the air and cause acute toxicity. During this period caused the death of 60 people and some cows.

Sulfur dioxide is also harmful to plants. The existence of this gas at high concentrations can kill the leaf tissue. edge of the leaf and the area between the bones of leaf damage. In chronic SO2 causes chlorosis. Iniakan plant damage worsened with the increase in air humidity. SO2 air will turn into sulfuric acid. Therefore, the region with the existence of pollution by SO2 is high enough, the plants will be damaged by sulfuric acid aerosols.

Damage was also experienced by the building materials such as limestone, marble, dolomite will be destroyed by the SO2 from the air. The effects of this damage will look at his performance, structural integrity, and age of the building.

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