Dispersion Of Pollutants
Mostrando 13-24 de 41 artigos, teses e dissertações.
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13. AdsorÃÃo de MolÃculas Sulfuradas AromÃticas em Adsorventes Mesoestruturados à Base de SÃlica. / Adsorption of aromatic sulfur molecules on mesostructured silica adsorbents.
The demand of a larger control in the emission of pollutants from automobiles, with a reduction in the emission of sulfur, has led to an intense research effort on techniques of sulfur removal from fuels. In the last few years, adsorption is thought to be a suitable polishing technique to achieve a deep desulfurization of streams from hydrodesulfurization (H
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/02/2011
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14. 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
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 vehicle
Publicado em: 2010
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15. Uma solução semi-analítica da dispersão de poluentes com a equação do telégrafo e fluxo contra-gradiente / Semi-analytical solution of pollutants dispersion with the telegraph equation and counter-gradient flux
Neste trabalho apresenta-se uma solução semi-analítica para a equação do telégrafo no estudo da dispersão vertical turbulenta na Camada Limite Atmosfera (CLA). A equação foi resolvida para representar uma difusão turbulenta que se processa sob velocidades finitas, associada a uma forma contra-gradiente para fluxos turbulentos. Considerando-se o car
Publicado em: 2010
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16. Avaliação da exposição da população à poluição relacionada ao tráfego no município de São Paulo / Traffic-related exposure assessment at São Paulo city
Introduction- Sao Paulo is one of the largest cities in Latin America, with almost 11 million inhabitants and around 6 million vehicles. Although traffic is the main source of air pollution, few studies investigated the relationship between vehicle pollution and health outcomes. Most studies analyzed health effects using average concentrations of environment
Publicado em: 2010
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17. Genotoxicidade e composição do material particulado emitido pela queima de Biomassa: um estudo de caso em Tangará da Serra, Região da Amazônia Brasileira
Tangara da Serra is located on southwestern Mato Grosso and is found to be on the route of pollutants dispersion originated in the Legal Amazons deforestation area. This region has also a wide area of sugarcane culture, setting this site quite exposed to atmospheric pollutants. The objective of this work was to evaluate the genotoxicity of three different co
Publicado em: 2010
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18. Evaluation of the atmospheric pollution dispersion s scenarious for the Paraíba river valley / Avaliação de cenários de dispersão de poluentes atmosféricos para o Vale do Rio Paraíba
This work was carried out a comprehensive assessment of the performance of the direction of winds, near the surface (1000 hPa), and its predominance in the region of Paraíba River Valley, from 10 cities located along the region of Paraíba River Valley. Furthermore, different scenarios were evaluated for dispersion of air pollutants for the region of Paraí
Publicado em: 2009
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19. PreparaÃÃo de carvÃo ativado a partir de borra de cafÃ: uso como adsorvente e como suporte catalÃtico para a remoÃÃo de poluentes orgÃnicos em meio aquoso. / Activated carbon production by spent coffee grounds: use as adsorbent and catalytic support for organic pollutants removal from aqueous medium
In this work, the preparation of activated carbons (AC) using spent coffee grounds and three activating agents CO2 (AC CO2), water vapor (AC H2O) and K2CO3 (ACK) were evaluated. These AC showed microporous nature with high surface area, except for AC CO2. These materials, as well the commercial AC (ACC) were tested as adorvents for the organic contaminant mo
Publicado em: 2009
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20. The sensibility of the estimative concentration of photochemical pollutants using different parameterizations of Planetary Boundary Layer with the air quality WRF/Chem model / Sensibilidade na estimativa da concentração de poluentes fotoquímicos com a aplicação de diferentes parametrizações de camada limite planetária utilizando o modelo de qualidade do ar WRF/Chem
Neste trabalho foi avaliado o impacto na simulação dos poluentes fotoquímicos do uso de diferentes parametrizações da Camada Limite Planetária (CLP) para a Região Metropolitana de São Paulo, utilizando o modelo de mesoescala não-hidrostático Weather Research and Forecasting (WRF) com o acoplamento dos módulos químicos (WRF/Chem). Para análise da
Publicado em: 2009
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21. Descrição da metodologia do cálculo de dispersão de plumas aplicada a um complexo industrial / Plume dispersion model methodology description applied to an industrial complex
The plume dispersion modeling is a tool used to estimate the pollutants distribution in the vicinities of a chimney. It has been widely used in developed countries for a long time and now is started to be used by Brazilian environmental agencies as one of the requirements to obtain the operation license. It is based on a Gaussian modeling where input data ar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/05/2008
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22. Análise crítica da utilização de modelagem matemática na avaliação da dispersão de efluentes leves no litoral da Baixada Santista ( Estado de São Paulo). / The analysis of mathematical models in the assessment of effuents dispersion in Baixada Santista coastline (State of São Paulo).
The prediction of the hydrodynamic water circulation and pollutants dispersion, mainly in coastal areas, has been a problem that engineers have been facing. This is due to the increase environmental impacts that involve coastal engineering work and management. The usage of mathematic modeling as assessment tool is necessary for these studies. The main purpos
Publicado em: 2008
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23. Avaliação de modelos fotoquímicos de qualidade do ar e estudo das circulações atmosféricas nos processos de dispersão de poluentes / Evaluation of air quality photochemical models and atmospheric circulations in the pollution dispersion processes.
Throughout numerical simulations and near to surface measurements of pollutants concentrations, in this work some meteorological situations of relevance for high ozone concentrations episodes over the Metropolitan Area of Sao Paulo (MASP) were studied., between 1999 and 2006. Firstly, two photochemical models, CIT and SPM-BRAMS, were evaluated in the sense o
Publicado em: 2008
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24. Ocean outfall of Santoss sewage: contribution on the sediment of fund to Al, Mg, K, Ca, Fe, Ti, Na, Si, Ba, Cu, Zn, Cr, Mn, Co, Ni e S / Emissário submarino de Santos: contribuição nos sedimentos de fundo para Al, Mg, K, Ca, Fe, Ti, Na, Si, Ba, Cu, Zn, Cr, Mn, Co, Ni e S
After the construction of the Ocean Outfall of Santoss sewage, all of Santoss and part of São Vicentes effluents started to be discarded in the Santos Bay after Preconditioning. In light of that aspect, CETESB began a monitoring control of the materials dumped through the emissary. In this dissertation sediments samples in the environment of that monitoring
Publicado em: 2008