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Article | REF: P4031 V1

Gaseous air pollution - Gas measurement

Authors: Gérard TOUPANCE, Alain PERSON, Yvon Le MOULLEC, Pierre MASCLET, Pascal E. PERROS

Publication date: September 10, 2004

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    3. SO2 measurement

    3.1 Properties of sulfur dioxide

    Sulfur dioxide SO 2 is a weakly acidic gaseous compound, emitted into the atmosphere during the combustion of products containing sulfur in varying proportions: biomass, oil, coal. It gradually oxidizes in the atmosphere and leads, in the presence of water, to sulfuric acid, the major culprit in atmospheric acidity and respiratory irritation. SO 2 is a respiratory irritant but, at usual atmospheric concentrations, it is above all its oxidation derivative, sulfuric acid, that presents environmental risks. The responsibility of SO 2 in air pollution has been identified for over 50 years, and it has long been measured...

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