PIXE and receptor models applied to remote aerosol source apportionment in Brazil
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Aerosol properties, in-canopy gradients, turbulent fluxes and VOC concentrations at a pristine forest site in Amazonia
2010, Atmospheric EnvironmentCitation Excerpt :Polycarbonate filters were analyzed for particulate mass, BCe and elemental composition (Maenhaut et al., 2002). PIXE analysis (Particle Induced X-Ray Emission) were made at University of São Paulo LAMFI (Laboratório de Análise de Materiais por Feixes Iônicos) to determine the concentration of 22 elements (Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Se, Br, Rb, Sr, Zr and Pb) (Artaxo and Orsini, 1987). BCe concentrations were obtained using a light reflectance technique.
Assessment of atmospheric metallic pollution in the metropolitan region of São Paulo, Brazil, employing Tillandsia usneoides L. as biomonitor
2007, Environmental PollutionCitation Excerpt :In many cases, the highest increase in concentration occurred in winter time (Exposure B: June–July/2002), in opposition of a period of lower enrichment in relation to the control sample observed in summer (Exposure C: Nov/2002–Jan/2003). In fact, the concentrations of pollutants in São Paulo, especially PM10, are higher in winter than in summer (Orsini et al., 1984, 1986; Artaxo and Orsini, 1987). For a better understanding of the behavior of the elements analyzed in the plants exposed in the polluted sites, a cluster analysis was applied by using Statistica software and the dendrogram obtained from the data is presented in Fig. 3.
Wintertime and summertime São Paulo aerosol source apportionment study
2001, Atmospheric EnvironmentPrecipitation chemistry in the coast of the Metropolitan Region of Rio de Janeiro, Brazil
2001, Environmental PollutionTrace elements in lake sediments measured by the PIXE technique
1999, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsAnalysis of atmospheric aerosols by PIXE: the importance of real time and complementary measurements
1999, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms