Composição Multielementar e Fontes de Emissão de Aerossóis Atmosféricos em Cuiabá de 1992 à 1995

Carlos César Wyrepkowski, Edilberto Ojeda de Almeida Filho, Alfredo Jorge, Carlo Ralph De Musis, José de Souza Nogueira

Abstract


The atmospheric aerosol samples had been collected continuouslyof July of 1992 the December of 1995 in the city of Cuiabá, located in theBrazilian, south open pasture of the tropical forest of the Amazonian basin,Brazil. The sampling device consisted of a amostrador of particulado materialof finishes and thick (AFG), which separates the thick fraction (2,5-10μm of aerodynamic diameter equivalent) of the fine fraction of aerosol (<2,5 μm). The fine and thick particulado material of all the showed filters(180 in the total) had been analyzed for the particulado material (MP),black carbon (BC) and for 47 chemical elements. The analyses of mainmain and component components absolute had been used for identificationof the emission sources. The multielementary analysis was carried throughwith a combination of PIXE and INAA. Three main types of aerosol sourceshad been identified: burning of biomass, emissions of natural biogênicoand ressuspensão of dust of the ground. During the dry station the finefraction of aerosol originated predominantly from the emissions of thebiomass burning (they had been responsible for about 64% of the mass ofthe fine fraction), while the thick fraction was dominated by particles ofdust of the ground (50 60% of the aerosol mass). During the humid stationthe biogênicos aerosols had been the types of predominant particles.



DOI: https://doi.org/10.5902/2179460X9811

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