Pollutant Atmospheric
Mostrando 13-24 de 33 artigos, teses e dissertações.
-
13. 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
-
14. Caracterização do ozônio próximo à superfície em são josé dos campos
- In the last few decades, the city of São José dos Campos presented a great commercial, industrial and urban development, being considered currently, as one of the great cities of São Paulo State. With a fleet to propagate around 200 thousand light vehicles. With development, the city faces problems of atmospheric pollution. As the surface ozone is consi
Publicado em: 2008
-
15. Modelagem numérica da camada limite atmosférica com validação experimental
This work presents the modeling of the atmospheric boundary layer to get the wind speed and wind direction profile over a complex terrain. The study of the atmospheric boundary layer is very important for the power lines project, determination of power cables insulating chain oscillation, power line limit load project and study of atmosphere pollutant disper
Publicado em: 2007
-
16. Simulação do vento atmosférico e dos processos de dispersão de poluentes em túnel de vento / Wind tunnel simulation of the atmospheric boundary layer and of the pollutant dispersion processes
O estudo experimental dos processos de dispersão atmosférica de poluentes permite a análise de problemas específicos e a avaliação dos modelos teórico-numéricos. Os custos da experimentação de campo conduzem à realização de estudos de laboratório em modelos reduzidos. Este trabalho tem por objetivo principal a reprodução dos ventos atmosféri
Publicado em: 2007
-
17. THE SEASONAL VARIATION IN THE CONCENTRATION OF POLYCYCLIC AROMATIC HYDROCARBONS AND PARTICULATE MATTER PM10 IN THE ATMOSPHERE OF SÃO PAULO / "A variação sazonal na concentração de hidrocarbonetos policíclicos aromáticos e material particulado MP10 na atmosfera de São Paulo"
The seasonal influences on the concentrations of polycyclic aromatic hydrocarbons (PAH) and n-alkanes in the particulate matter PM10 were studied in this work from November 2001 to June 2002 (n = 23), and between April 2003 and May 2004 (n=31), in continuity to the studies accomplished in the winter of 2000 in the metropolitan area of São Paulo (MASP). Atmo
Publicado em: 2006
-
18. "Óxidos do tipo Perovskitas para reações de decomposição direta de NO e redução de NO com CO" / "Reduction of NO by CO and direct decomposition of NO on perovskite-type oxide"
A important technology to reduce the atmospheric pollution is the use of catalysts, to transform high pollutant as NO in other inoffensive gases to the environment. In this work, the perovskite oxides La2CuO4, LaNiO3, LaMnO3, La1,4Sr0,6CuO4, La0,7Sr0,3NiO3 e La0,7Sr0,3MnO3 were prepared through co-precipitation method and characterized by X-ray diffraction a
Publicado em: 2006
-
19. Studies of air pollution in the municipal district of Sete Lagoas, MG using nuclear techniques / Estudos da poluição do ar do município de Sete Lagoas, MG utilizando técnicas nucleares
Toxic metals, such as Ni, V, Zn, Cu, Cr, Mn and metalloids as As and Se and their compositions are associated mainly with the smaller diameter particulates present in the atmospheric aerosols. This fact is important, principally, when it concerns public health, because this is considered the breathable fraction of particles that can penetrate deeply into the
Publicado em: 2006
-
20. INVERSE PROBLEM IN ATMOSPHERIC PHISICS / PROBLEMAS INVERSOS EM FÍSICA DA ATMOSFERA
Techniques for estimating unknown terms - such as eddy diffusivity and counter-gradient - in atmospheric flow are presented in this study. The methos is also used to identify the source term in atmospheric pollution. The scheme adopted is based on inverse problem methodology. The inverse problem is formulated as a non-linear optimization problem, where the o
Publicado em: 2005
-
21. Study abaout the determination of benzene and ammonia in air using quartz piezoeletric sensor. / Estudo sobre a determinação de benzeno e amônia no ar, utlizando sensor piezelétrico de quartzo
The objective of this work was to study, develop and evaluate coatings for detecting benzene and ammonia in atmospheric air, by using a piezoelectric quartz sensor. Nowadays, piezoelectric quartz sensors are very important in Analytical Chemistry due to their numerous aplications (in gaseous fase or in solution). This method is based on the fact that the qua
Publicado em: 2005
-
22. A model of the carbon monoxide transport in the respiratory system of the human body. / Um modelo do transporte de monóxido de carbono no sistema respiratório do corpo humano.
This work is about the transport of carbon monoxide in the human body. The carbon monoxide is a colorless, odourless and tasteless gas and the main cause of accidental deaths for poisoning. It is responsible for the biggest amount of pollutant launched in the atmosphere. When inspired, it occupies places destined to the oxygen transport, with affinity about
Publicado em: 2005
-
23. Vegetal bioindicators of atmospheric pollution: a contribution to community health / "Bioindicadores vegetais de poluição atmosférica: uma contribuição para a saúde da comunidade"
Air quality in urban and industrial areas tends to present undesirable concentrations of contaminants, without the availability of a broad monitoring system, given the sophistication of conventional physical-chemical methods, which require high expenditure for implantation, operation and maintenance. These costs can be reduced by the adoption of the compleme
Publicado em: 2004
-
24. COMPUTATIONAL INVESTIGATION ON THE FLOW AND ATMOSPHERIC POLLUTANT DISPERSION OVER COMPLEX TOPOGRAPHY / INVESTIGAÇÃO COMPUTACIONAL DO ESCOAMENTO E DA DISPERSÃO DE POLUENTES ATMOSFÉRICOS SOBRE TOPOGRAFIAS COMPLEXAS
O objetivo principal do presente trabalho foi investigar computacionalmente o escoamento e a dispersão de poluentes atmosféricos sobre topografias complexas tridimensionais em escala de laboratório. Foram realizadas simulações numéricas de escoamentos neutros e estavelmente estratificados sobre colinas e também sobre terreno plano. A modelagem matemá
Publicado em: 2004