Sulfur dioxide nitrogen oxides

Human-made sources cover a wide spectrum of chemical and physical activities and are the major contributors to urban air pollution. Air pollutants in the United States pour out from over 10 million vehicles, the refuse of over 250 million people, the generation of billions of kilowatts of electricity, and the production of innumerable products demanded by eveiyday living. Hundreds of millions of tons of air pollutants are generated annu ly in the United States alone. The five main classes of pollutants are particulates, sulfur dioxide, nitrogen oxides, volatile organic compounds, and carbon monoxide. Total emissions in the United States are summarized by source categoiy for the year 1993 in Table 25-10. 

Gaseous. True gases such as sulfur dioxide, nitrogen oxide, ozone, carbon monoxide, etc. vapors such as gasoline, paint solvent, diy cleaning agents, etc. 

Source category Particulate (PM-10) Sulfur dioxide Nitrogen oxides Volatile organic compounds Carbon monoxide... 

The sum of indicator values obtained when multiplying all emissions assigned to that impact category by their respective characterization factors is called the category indicator result. The indicator moles of may, for instance, be the sum of contributions from sulfur dioxide, nitrogen oxides, and hydrogen chloride, and there is a characterization factor for each of them relative to the indicator. 

The remaining. SO percent or less ot supply must have an average emission rate below the system average for fossil-fuel-emitted sulfur dioxide, nitrogen oxide, and carbon dioxide. 

In Mexico City, several air quality parameters are measured continuously by an Automated Monitoring Network operated by the Under Secretariat of Ecology. Carbon monoxide, particulate matter, sulfur dioxide, nitrogen oxide, and ozone are the contaminants exceeding Air Quality Standards. Emissions produced by 2.7 million vehicles and 35,000 commercial and industrial outfits are not easily dispersed in a Valley located at 2240 m and surrounded by two mountain chains which hinder air circulation. An Integral Program, recently established to alleviate pollution, is briefly described. 

Carbon monoxide Sulfur dioxide Nitrogen oxides Ozone... 

Air pollution is still of crucial importance in South Korea. Emission of sulfur dioxide, nitrogen oxides and ammonia that have been rising in recent decades are responsible for air pollution in many places of the country. The amount of sulfur dioxide emitted... 

Sulfur dioxide Nitrogen oxides Carbon dioxide Sulfur dioxide Nitrogen oxides Carbon dioxide Nitrogen oxides Carbon dioxide Sulfur dioxide Nitrogen oxidess Carbon dioxide 1... 

The above material is expected to have excellent diffusion resistance to gases such as sulfur dioxide, nitrogen oxides and saturated water vapour and outstanding chemical resistance to mineral acids, bases, aqueous phases and polar solvents and weatherproof. 

Irritant gases (eg, chlorine, ammonia, sulfur dioxide, nitrogen oxides) Corrosive effect on upper and lower airways Cough, stridor, wheezing, pneumonia... 

Emissions from the combustion of fossil fuels have become an increasing concern to society over the past several decades. The amounts of sulfur dioxide, nitrogen oxides, and particulates placed... 

Properties of the air pollutants sulfur dioxide, nitrogen oxides, peroxyacyl nitrates, and ozone have been considered from chemical, biochemical, and physiological points of view. Physiological observations cannot demonstrate the chemical mode of toxicity. Chemical and in vitro biochemical studies may be irrelevant at the physiological level. Consideration of all three approaches indicates which hypotheses of toxicity are more plausible and suggests new areas of investigation. 

Matros, Y.S. Noskov, A.S. Chumachenko, V.A. Goldman, O.V. Theory and application of unsteady catalytic detoxication of effluent gases from sulfur dioxide, nitrogen oxides and organic compounds. Chem. Eng. Sci. 1988, 43 (8), 2061-2066. 

Ammonium (NH " Calcium Sulfur dioxide Nitrogen oxides Hydrochloric acid Organic acids Hydrogen peroxide Ozone... 

Air pollution is an emerging important environmental problem in Asia as a whole, and especially in East Asia. Evergrowing emissions of sulfur dioxide, nitrogen oxides, ammonia and ground level ozone concentration in many big cities in this region make the people worry about the synergetic effects of various pollutants. 

---