A Radiotracer Studyof theProductionofFormaldehydein thePhoto-OxidationofEthylenein theAtmosphere

Photochemical aspects of air pollution. Review

“…This indicates that a synergistic effect is taking place and that some product (or products) is being formed from the more reactive olefins, a product that reacts further with ethylene. Altshuller, Klosterman, et al (1966) also investigated the photooxidation of ethylene; their results essentially agree with those of Nicksic, Harkins, et al (1964). When 0.5 p.p.m.…”

“…Synergistic Effects in the Photooxidation of Organic Substances A synergistic effect is one in which the reactivity or the amount of product produced by a given compound is affected by the presence of a second. Some indications of this effect were observed by Nicksic, Harkins, et al (1964) with the photooxidation of ethylene. When ethylene was irradiated in the presence of oxygenates and certain aromatics, more formaldehyde was produced.…”

Studies on the Role of Sulfur Dioxide in Visibility Reduction

“…26 The air for the experiment was purified by filtration through activated carbon followed by 13 X molecular sieve. The background level was on the average 25 Mg/M 3 compared to 150-170 Mg/M 3 for the atmosphere in Los Angeles.…”

Diversity of Carbonyl Compounds in Biogas and Natural Gas Revealed Using High-Resolution Mass Spectrometry and Nontarget Analysis

“…Airborne carbonyl compounds such as formaldehyde, acrolein, and methyl ethyl ketone have long been chemicals of concern in the environment. Carbonyls are common as both primary pollutants formed by incomplete combustion and secondary pollutants formed as intermediates during photo-oxidation of other organic compounds . A number of carbonyl compounds have been shown to be toxic and/or carcinogenic. , Carbonyls play an important role in atmospheric chemistry as a major source of free radicals, in forming secondary pollutants including ozone and peroxyacyl nitrates (PANs), , and in the formation and growth of secondary organic aerosols (SOAs) …”