期刊
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
卷 18, 期 2, 页码 342-351出版社
SOC BRASILEIRA QUIMICA
DOI: 10.1590/S0103-50532007000200015
关键词
atmospheric pollution; air quality simulation; aldehydes; BTEX
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 Timbo river and emissions from a methanol industry. Average BTEX concentrations were: 1.92, 9.02, 6.37, 21.65 and 5.99 mu m(-3) for benzene, toluene, ethylbenzene, m,p-xylene and o-xylene, respectively. PM 10 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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