O objetivo deste trabalho é estudar a dispersão dos principais poluentes NOx (Óxidos de Nitrogêni... more O objetivo deste trabalho é estudar a dispersão dos principais poluentes NOx (Óxidos de Nitrogênio), SOx (Óxidos de Enxofre), CO (Monóxido de Carbono) e MP (Material Particulado) presentes na atmosfera do município de Paulínia – SP (São Paulo), Brasil no período de 01 a 31 de agosto de 2009, no intuito de identificar as regiões mais afetadas pela poluição atmosférica. Neste estudo foram consideradas as emissões de fontes veiculares e industriais, visando verificar a contribuição de cada tipo de fonte na concentração total de poluentes na atmosfera. O programa computacional utilizado foi o ISCST3 (Industrial Source Complex, Short Term, 3ª geração). A comparação das máximas concentrações horárias de NOx simuladas com as observadas nas estações de monitoramento da qualidade do ar Paulínia-Centro e Paulínia-Sul, administradas pela CETESB (Companhia Ambiental do Estado de São Paulo), mostra uma diferença relativa de 53% e 57%, respectivamente. Para as concentrações médias de NOx simulada...
The most used statistical model to evaluate the relation between air pollution and population's h... more The most used statistical model to evaluate the relation between air pollution and population's health is regression analysis, as it is able to relate one or more explanatory variables with one response variable. This research aims to present the generalized linear model with Poisson regression. Every assessment step, from data collection and analysis to the verification of the chosen model adjustment, will be presented.
The aim of this investigation was to quantify organic and inorganic gas emissions from a four-cyl... more The aim of this investigation was to quantify organic and inorganic gas emissions from a four-cylinder diesel engine equipped with urea-SCR system. Using a bench dynamometer, the emissions from the following mixtures were evaluated using an FTIR spectrometer: low sulfur diesel (LSD), ultra-low sulfur diesel (ULSD) and a blend of 20 % soybean biodiesel and 80% ULSD (B20). For all studied fuels, the use of the SCR system yielded statistically significant (p<0.05) lower NOx emissions. In the case of the LSD and ULSD fuels, the SCR system also significantly reduced emissions of compounds with high photochemical ozone creation potential, such as formaldehyde. However, for all tested fuels, the SCR system produced significantly (p<0.05) higher emissions of N2O. In the case of LSD, the NH3 emissions were elevated and in the case of ULSD and B20 fuels, the non-methane hydrocarbon (NMHC) and total hydrocarbon (HCD) emissions were significantly higher.
O objetivo deste trabalho é estudar a dispersão dos principais poluentes NOx (Óxidos de Nitrogêni... more O objetivo deste trabalho é estudar a dispersão dos principais poluentes NOx (Óxidos de Nitrogênio), SOx (Óxidos de Enxofre), CO (Monóxido de Carbono) e MP (Material Particulado) presentes na atmosfera do município de Paulínia – SP (São Paulo), Brasil no período de 01 a 31 de agosto de 2009, no intuito de identificar as regiões mais afetadas pela poluição atmosférica. Neste estudo foram consideradas as emissões de fontes veiculares e industriais, visando verificar a contribuição de cada tipo de fonte na concentração total de poluentes na atmosfera. O programa computacional utilizado foi o ISCST3 (Industrial Source Complex, Short Term, 3ª geração). A comparação das máximas concentrações horárias de NOx simuladas com as observadas nas estações de monitoramento da qualidade do ar Paulínia-Centro e Paulínia-Sul, administradas pela CETESB (Companhia Ambiental do Estado de São Paulo), mostra uma diferença relativa de 53% e 57%, respectivamente. Para as concentrações médias de NOx simulada...
The most used statistical model to evaluate the relation between air pollution and population's h... more The most used statistical model to evaluate the relation between air pollution and population's health is regression analysis, as it is able to relate one or more explanatory variables with one response variable. This research aims to present the generalized linear model with Poisson regression. Every assessment step, from data collection and analysis to the verification of the chosen model adjustment, will be presented.
The aim of this investigation was to quantify organic and inorganic gas emissions from a four-cyl... more The aim of this investigation was to quantify organic and inorganic gas emissions from a four-cylinder diesel engine equipped with urea-SCR system. Using a bench dynamometer, the emissions from the following mixtures were evaluated using an FTIR spectrometer: low sulfur diesel (LSD), ultra-low sulfur diesel (ULSD) and a blend of 20 % soybean biodiesel and 80% ULSD (B20). For all studied fuels, the use of the SCR system yielded statistically significant (p<0.05) lower NOx emissions. In the case of the LSD and ULSD fuels, the SCR system also significantly reduced emissions of compounds with high photochemical ozone creation potential, such as formaldehyde. However, for all tested fuels, the SCR system produced significantly (p<0.05) higher emissions of N2O. In the case of LSD, the NH3 emissions were elevated and in the case of ULSD and B20 fuels, the non-methane hydrocarbon (NMHC) and total hydrocarbon (HCD) emissions were significantly higher.
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