Sulfur dioxide or sulphur dioxide (British English) is the chemical compound with the formula SO 2. The largest sources of SO2 emissions are from fossil fuel combustion at power plants andother industrial facilities. It is produced from the burning of fossil fuels (coal and oil) and the smelting of mineral ores (aluminum, copper, zinc, lead, and iron) that contain sulfur. Smaller sources of SO2 emissions include: industrial processes such as extracting metal from ore; natural sources such as volcanoes; and locomotives, ships and other vehicles and heavy equipment that burn fuel with a high sulfur content. CAS Registry No. Other gaseous SOx (such as SO3) are found in the atmosphere at concentrations much lower than SO2. Appearance: Colourless gas. In its chemical form it's used as a preservative for instant potatoes, wine, dried fruits and applesauce—and also as a fungicide on grapes. Alternatively, sulfur dioxide can be reduced to solid elemental sulfur through catalysis — a chemical reaction brought on by a catalyst and usually a reducing agent such as hydrogen, methane, or carbon monoxide — and then used as a raw material for such things as fertilizer. Sulfur dioxide is a foul-smelling, colorless gas that's emitted when sulfur-containing fuel, including diesel and fuel oil, are burned. Control measures that reduce SO2 can generally be expected to reduce people’s exposures to all gaseous SOx. 3. Sulfuric acid is a major component of acid rain. People with asthma, particularly children, are sensitive to these effects of SO2. The combustion of pure solid sulfur in the presence of oxygen that results in the formation of sulfur dioxide gas is represented using the balanced chemical equation shown below. Man-made source – Combustion of fossil fuels (coal, petroleum, natural gas) in motor engines and industries. Sulfur dioxide dissolves easily in water to form sulfuric acid. Chemical equation: SO 2 (g) + H 2 O (l) → H 2 SO 3 (aq) Sulfurous acid is then oxidised to sulfuric acid by atmospheric oxygen. Volcanoes with sulfur appear to run with blue lava. Waste gases are produced when fossil fuels undergo combustion. Sulfur dioxide is a pungent, chocking and colourless gas. This may have the important co-benefit of reducing the formation of particulate sulfur pollutants, such as fine sulfate particles. Acid rain react with aluminium hydroxide in the soil to produce Al3+ ions, which are toxic to plants. If you capture this SO2 gas in water, you will end up with Sulfurous Acid (H2SO3), which is a weak acid. At high concentrations, gaseous SOx can harm trees and plants by damaging foliage and decreasing growth. If you burn sulfur in plenty of air, you will convert it to sulfur dioxide gas (SO2). United States Environmental Protection Agency, EPA’s national and regional rules to reduce emissions of SO, EPA identifies areas where the air quality does not meet EPA SO, Learn more about visibility and regional haze, Learn about how air quality standards help reduce SO, Secondary NO2 and SO2 Standard Regulatory Actions, Primary SO2 Standard Implementation Actions, SIP Training Presentations and Assistance. Volcanoes that spew molten sulfur display another interesting feature of the element: It burns with a blue flame from the sulfur dioxide that is produced. Sulfur dioxide, SO2, is a colorless gas or liquid with a strong, choking odor. How to pronounce sulfur dioxide. SO2 is the component of greatest concern and is used as the indicator for the larger group of gaseous sulfur oxides (SOx). How to say sulfur dioxide. Most commonly, it can be inhaled from air pollution. This could be one of the reasons grapes frequently make the Environmental Working Group's Dirty Dozen list of produce that's most likely to be … to dissolve into solution. SO. The largest source of SO2 in the atmosphere is the burning of fossil fuels by power plants and other industrial facilities. Sulfur is generally an allowed pesticide in organic gardening.