Estudo de compostos orgânicos voláteis na atmosfera da região metropolitana de Campinas / Study of volatile organic compounds in the atmosphere of metropolitan area of Campinas

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

This work presents a study of volatile organic compounds (VOC) found in the atmosphere of Metropolitan Area of Campinas (Campinas, SP). The first step was to perform a vehicular emissions inventory of the study area. Vehicular emissions were estimated using emission factors from new vehicles and bottom-up approach, considering different categories of vehicles and kinds of fuel used. The inventory results showed that over 80 % of the total pollutants are emitted by vehicles. These estimatives were used in the dispersion study of the pollutants, as well as industrial source emissions. The simulations were performed with ISC-Aermod View software (Lakes Environmental). The results of the dispersion model indicated that the plume of pollutants is concentrated over the urban region of Campinas and also over the industrial region of Paulínia. Isoconcentration curves of hydrocarbon dispersion were used to select the sites for monitoring VOC. Passive sampling with adsorbent tubes with Tenax TA were used and collected samples were analyzed by thermal desorption coupled with GC-FID. Higher VOC concentrations, 47.60 and 21.19 µg m-3, were found in the site of the oil refinery and Campinas ceter region , respectively. The most abundant compounds found in all sites were BTEX, mainly toluene and xylenes. The monitoring results were evaluated with principal component and cluster analysis, which showed that VOC come from the same emission sources, which are mainly vehicular in the area

ASSUNTO(S)

compostos orgânicos voláteis ar - poluição poluentes - dispersão emissão atmosférica monitoramento ambiental volatile organic compounds air pollution pollutants dispersion air emission monitoring

ACESSO AO ARTIGO

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