A two-year monitoring program of aromatic hydrocarbons in Rio de Janeiro downtown area

Journal of the Brazilian Chemical Society

Universidade do Estado do Rio de Janeiro, Resende, Brazil¹  Arbilla, Graciela¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil¹  Corrêa, Sérgio M.¹ 

关键词: air pollution monitoring;    hydrocarbons emision;    BTEX;    Rio de Janeiro;   

DOI  :  10.1590/S0103-50532007000300007

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Benzene, toluene, ethylbenzene, m+p+o-xylene (BTEX) and two trimethylbenzenes (BTEXT) were monitored in Rio de Janeiro downtown area during 2004 and 2005. Some criteria pollutants and meteorological parameters were also determined in order to assess the main data correlations. 94 samples were collected, using activated charcoal cartridges, between 9:00 am and 3:00 pm. The mean concentrations obtained were: 14.5, 22.8, 9.19, 19.3, 8.5, 10.4 and 12.1 µg m-3 for benzene, toluene, ethylbenzene, m+p-xylene, o-xylene, 1,2,3-trimethylbenzene and 1,3,5-trimethylbenzene, respectively. These values are similar to mean concentrations obtained in the Brazilian cities of Porto Alegre, Volta Redonda and São Paulo, which use the same type of fuel. Multivariate analyses showed that individual BTEXT are emitted by the same source and are not well correlated with other primary pollutants. These results may be due to the contribution of evaporative losses of the BTEXT and to the formation of secondary volatile organic compounds in the atmosphere.

【 授权许可】

Unknown