Investigation Of The

Abstract

As the second phase of our study of the atmospheric ozone formation potentials of constituents of aluminum rolling mill emissions, a series of environmental chamber experiments and computer model simulations were carried out to assess the atmospheric ozone formation potentials of the selected cycloalkanes hexyl cyclohexane and octyl cyclohexane. The experiments consisted of determining the effects on NO oxidation, ozone formation and OH radical levels when adding the compounds to varying simulated model photochemical smog systems. The chamber experiments employed both blacklight and xenon arc light sources. These data supplemented similar experiments carried out previously on C 12 - C 16 normal alkanes. Like the C 12 normal alkanes, these cycloalkanes were found to be strong inhibitors of radical levels, inhibited rates of NO oxidation and O 3 formation in experiments that are sensitive to radical effects, but had only relatively small effects on O 3 in experiments more representative of atmospheric conditions