Nitrogen dioxide sources

What are the main sources of nitrogen oxides? Where does nitrogen dioxide come from? What is the source of nitrogen oxide? It is one of several nitrogen oxides. NO primarily gets in the air from the burning of fuel.

Nitrogen Dioxide ( NO) Pollution. NO forms from emissions from cars, trucks and buses, power plants, and off-road equipment. NOforms when fossil fuels such as coal, oil, gas or diesel are burned at high temperatures.

NOand other nitrogen oxides in the outdoor air contribute. The major source of nitrogen dioxide in Australia is the burning of fossil fuels: coal, oil and gas. Most of the nitrogen dioxide in cities comes from motor vehicle exhaust (about ). Other sources of nitrogen dioxide are petrol and metal refining, electricity generation from coal-fired power stations, other manufacturing industries and food processing. Its presence in air contributes to the formation and modification of other air pollutants, such as ozone and particulate matter, and to acid rain. However, nitric oxide (NO) and nitrogen dioxide (NO 2) are the two principal nitrogen oxides associated with combustion sources.

Nitrous oxide is a by-product of fuel combustion in mobile and stationary sources. When any fossil fuel is burnt, part of the nitrogen that is in the fuel and surrounding air gets oxidized creating nitrous oxide emissions. The majority of stationary emissions come from coal fired power plants. A natural source of nitrogen oxides occurs from a lightning stroke.

The very high temperature in the vicinity of a lightning bolt causes the gases oxygen and nitrogen in the air to react to form nitric oxide. The nitric oxide very quickly reacts with more oxygen to form nitrogen dioxide. Burning of fossil fuels such as coal, oil and natural gas are the main source of sulfur dioxide emissions. Coal fired power stations, in particular, are major sources of sulfur dioxide , with coal burning accounting for percent of annual emissions, as explained by the Tropospheric Emission Monitoring Internet Service (TEMIS).

Coal- and gas-fired power plants and vehicles constitute the major anthropogenic (human-produced) sources. NO is comprised of one atom of nitrogen and two atoms of oxygen, and is a gas at ambient temperatures. It has a pungent smell, and is brownish red in color. The major mechanism for the formation of nitrogen dioxide in the atmosphere is the oxidation of the primary air pollutant nitric oxide. The two major emission sources of nitrogen oxides are automobiles and stationary fuel combustion sources such as electric utility and industrial boilers.

Level - Source on Air Pollution. It transforms in the air to form gaseous nitric acid and toxic organic nitrates. NO also plays a major role in atmospheric reactions that produce ground-level ozone, a major component of smog. The main source of nitrogen dioxide resulting from human activities is the combustion of fossil fuels (coal, gas and oil) especially fuel used in cars.

All of these sources burn fossil fuels. People who live or work near busy roadways can experience high exposures. Two of the most toxicologically significant compounds are nitric oxide (NO) and nitrogen dioxide (NO ). Other gases belonging to this group are nitrogen monoxide (or nitrous oxide, N O), and nitrogen pentoxide (NO ). Sulfur dioxide is a gas released by both human and natural sources.