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Experimental and theorical study of the air quality in a suburban industrial-residential area in Rio de Janeiro, Brazil

DOI: 10.1590/S0103-50532007000200015

Keywords: atmospheric pollution, air quality simulation, aldehydes, btex.

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Abstract:

in this work, data for criteria and non-criteria pollutants were obtained in a suburban industrial-residential area in rio de janeiro, from april to november 2002. formaldehyde and acetaldehyde concentrations were found in the ranges 25.25-231.73 ppb and 9.48-75.74 ppb, respectively. these high concentrations may be attributed to several sources: vehicular and industrial emissions, the presence of several trash incinerators, effluents and waste rejected in the faria timbó river and emissions from a methanol industry. average btex concentrations were: 1.92, 9.02, 6.37, 21.65 and 5.99 μg m-3 for benzene, toluene, ethylbenzene, m,p-xylene and o-xylene, respectively. pm10 concentrations showed maximum mean values in october, april and june. simulated concentrations were obtained for august 2002 using a trajectory model. the maximum calculated ozone concentration was 39.8 ppb, at 3:00 pm, in good agreement with experimental data (38.5 ppb). the ozone isopleths show that the local is in the high voc/nox region, typical of suburban and downwind areas.

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