Technique for measuring photochemical reactions in atmospheric samples

The photochemical aspects of air pollution are reviewed through 1964. The topics covered include: nitric oxide oxidation and inorganic reactions, atomic oxygen and ozone reactions, singlet oxygen and its importance to air pollution, aldehyde and ketone photolysis, sulfur dioxide photolysis, synergistic effects, photooxidation of commercial solvents, product formation with emphasis on hydroperoxides, nitric acid and peroxybenzoyl nitrate, reactivity measurements including hydrocarbon consumption, nitric oxide oxidation, oxidant formation and eye irritation, aerosols, natural pollution, and actinometry. The effects of photochemical pollutants on plants are not covered. Suggestions for future research are also given.

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“…The presence of «-butane in the photooxidation of toluene apparently has a suppressing effect (Altshuller, Kopczynski, et al, 1970). In a 6-hr.…”

Section: Ch3 + Co [Ii]mentioning

confidence: 99%

Photochemical aspects of air pollution. Review

Altshuller¹,

Bufalini²

1971

Environ. Sci. Technol.

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140

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“…Precursors to photochemical smog, namely, the hydrocarbon and oxides of nitrogen, are measured routinely by a network of state, federal, and other governmental laboratories throughout the United States. Information of detailed hydrocarbon composition in ambient atmosphere has also been reported (1)(2)(3)(4)(5)(6)(7). With the exception of ozone, little information is available on ambient concentrations of the secondary products of photochemical smog such as peroxyacetyl nitrate (PAN).…”

mentioning

confidence: 99%

PAN and oxidant measurement in ambient atmospheres

Lonneman¹,

Bufalini²,

Seila³

1976

Environ. Sci. Technol.

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“…For NO2, it was assumed that atmospheric NO2 levels are directly proportional to NO* emission levels. This assumption is supported by photochemical smog chamber experiments [Korth et al ( 14) and Altshuller et al (15)]. It would hold exactly, by the linearity of the equation of advective diffusion, if two conditions were met: (1) if NO2 were an inert pollutant (which it certainly is not) and (2) if all sources of NO* were reduced in proportion (homogeneously) in emission level changes.…”

Section: Control Cost-emission Level Relationshipmentioning

confidence: 85%

Application of Model to Photochemical Smog in Los Angeles County in 1975-Part II

Trijonis¹

1974

Environ. Sci. Technol.

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The general least cost-air quality model of Part I is characterized for the problem of photochemical smog in Los Angeles County in 1975. Emission levels are specified by average tons/day emissions of reactive hydrocarbons (RHC) and nitrogen oxides (NO*). Air quality, also two dimensional, is specified by the expected number of days per year that oxidant and nitrogen dioxide in Central Los Angeles exceed the California 1-hr state standards. The baseline for additional control policy is the 1975 emission level with the present federal new car control program and with other sources having the degree of control existing in 1971. The least cost of reaching various emission levels is found by applying linear programming to 23 major source types and 31 potential "add-on" controls. Expected O3 and NO2 levels are found as functions of emission levels using empirical-statistical air quality models. These results are combined to yield the least cost of attaining various O3 and NO2 levels in Central Los Angeles in 1975.Costs are in addition to new car control program cost and to cost associated with 1-1-71 degree of stationary source control Volume 8, Number 9.

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Technique for measuring photochemical reactions in atmospheric samples

Cited by 24 publications

References 6 publications

Photochemical aspects of air pollution. Review

Photochemical aspects of air pollution. Review

PAN and oxidant measurement in ambient atmospheres

Application of Model to Photochemical Smog in Los Angeles County in 1975-Part II

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