Estudo da dispersão atmosférica e agressividade do meio em maringá- pr por meio do modelo de dispersão aermod

• Autor(a) principal: Oliveira, Michely Patrícia de Bitencourt de
• Data de Publicação: 2012
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Estadual de Maringá (RI-UEM)
• Texto Completo: http://repositorio.uem.br:8080/jspui/handle/1/3634
• topic: Emissões veiculares; Emissões Industriais; Agressividade do meio; Modelo de dispersão; Maringá; Paraná; Brasil.; Vehicle emissions; Industrial emissions; Aggressiveness of the medium; dispersion model; Maringa; Paraná; Brazil.; Engenharias; Engenharia Química

Maringá is a city in development in the State of Paraná, wich presents significant growth of the vehicle fleet but no air quality monitoring network. Thus for evaluating dispersion and quantification of air pollutants from mobile and stationary sources distributed in the city of Maringá, with the use of Aermod atmospheric model. The study's general objectives were: to estimate the air quality in the downtown through pollutants CO, NOx e SOx ; area assess seasonality in the pollutants dispersion, and to check the environment aggressiveness to the electricity transmission grids. Emissions from mobile sources are proviment from vehicles present in the downtown area and stationary sources of emissions, from fuels combustion: wood, sugar cane bagasse, LPG, oil and neutral base oil GMP. For the use of dispersion model it is necessary to define the meteorological parameters and surface elevation, physical parameters and operational emission sources, and the distribution of receptors, in which were estimated pollutants concentrations . Regarding the objective estimation of air quality, it was found that mobile sources are the major concern of the considered pollutants in the city, especially, Duque de Caxias Avenue, which presents a large circulation of people and vehicles. The maximum estimated levels by the model did not exceed the levels of air quality regulatory standards specified by CONAMA Resolution number 03/1990, except for concentration nitrogen oxides . It was also noted at this stage of the work that vehicles in traffic lights queues are important sources of carbon monoxide, corresponding to approximately 50% of the maximum concentration estimated by the model. In the study of seasonality, it was found that the colder seasons of the year of 2009 were the most unfavourable to the dispersion of pollutants, especially for the autumn season. It was noted in the study that the maximum hourly concentrations did not occur at the peak emission of pollutant (2:00 pm), highlighting the influence of dispersive conditions in the concentration of pollutants such as wind speed and temperature. As a result of studying the aggressiveness of the environment to power line transmission, Maringá showed up corrosiveness ranging from low to medium based on data obtained from the NBR 14643, which vary depending on the concentration of SO2, surface moist and type of material considered. Therefore, it was conducted a qualitative analysis of corrosivity for pollutants NOx and SOx emitted by stationary sources, verifying that the NOx operates predominantly in the east while the SOx in the western region. Because there is no pollutants measurement data, validation of the model was not performed. However the results can be used in a qualitative way, in order to define regions where it should be interesting to carry out measurements of pollutants with purpose of determining the air quality or the environment aggressiveness.