Measurements of atmospheric carboxylic acids and carbonyl compounds in Sao Paulo City, Brazil

Article Abstract:

Air samples are taken at two sites in the city of Sao Paulo, Brazil during the wintertime at morning, noon, and night. Levels of formaldehyde and acetaldehyde are graphed, showing vehicle emmissions and photochemical production of the pollutants.

Motor vehicles and car bodies, Motor Vehicles, Automobile and Light Duty Motor Vehicle Manufacturing, Brazil, Formaldehyde, Acetaldehyde, Automobile industry, Sao Paulo, Brazil (City)

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Formation and emission of volatile polonium compound by microbial activity and polonium methylation with methylcobalamin

Article Abstract:

This study undertakes the evaluation of biologically mediated emission of polonium (Po) from culture solution inoculated sea sediment extract. Sterilization of the culture medium with antibiotics demonstrated that biological activity of microorganisms was responsible for the emissions and formation of volatile Po compound, as well as the use of seawater as a culture medium. This shows that it is possible that atmospheric Po may originate from biotic sources instead of abiotic ones.

Japan, Water Pollution Control R&D, Organic Chemicals NEC, Pollution, Chemical industry, Organic compounds, Volatile organic compounds, Water pollution research

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Release of CFC-11 from disposal of polyurethane foam waste

Article Abstract:

Chlorofluorocarbons (CFCs), which are often used for industrial purposes such as propellant in spraying cans, blowing agents for insulation foams and air conditioning and refrigeration fluid, are one of the biggest factors in the depletion of the Ozone. The following research examines CFC-11, the halocarbon used extensively as a blowing agent for polyurethane insulation foams in home appliances and construction. CFC-11 is one of the more important compounds to focus on compared to other CFCs because of its widespread use.

United States, Industrial Organic Chemicals, Halogenated Hydrocarbons, Prevention, Halocarbons, Ozone layer depletion, Chlorofluorocarbons

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