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Effect of hydro carbon and nitrogen oxygen mixtures on photochemical smog formation under simulated transport conditions


, : Effect of hydro carbon and nitrogen oxygen mixtures on photochemical smog formation under simulated transport conditions. Journal of the Air Pollution Control Association 31(11): 1169-1172

The effect of urban pollution on downwind areas was studied. Concern was expressed over the appropriate hydrocarbon and NOx control strategy to be used in minimizing the effects of O3 and NO2 on urban population centers and their downwind environs. O3 and NO2 formation were studied in smog chamber irradiations as a function of the initial NOx concentration at 3 hydrocarbon concentrations. By carrying out the irradiations for a period of time equivalent to 1 solar day in a continuously diluting system, smog formation in a chemically reacting pollutant system under transport was simulated. The results of this experimental simulation suggested that hydrocarbon reduction reduced O3 in urban and downwind areas while NOx reduction increased O3 in the urban area and had little effect on O3 in downwind areas. Hydrocarbon and NOx reduction reduced atmospheric NO2 levels, with the effect of NOx reduction generally being more pronounced.

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