Abatement
Mostrando 13-24 de 42 artigos, teses e dissertações.
-
13. TiO2-Photocatalyzed degradation of phenol in saline media in an annular reactor: hydrodynamics, lumped kinetics, intermediates, and acute toxicity
The photocatalytic degradation of phenol in aqueous suspensions of TiO2 under different salt concentrations in an annular reactor has been investigated. In all cases, complete removal of phenol and mineralization degrees above 90% were achieved. The reactor operational parameters were optimized and its hydrodynamics characterized in order to couple mass bala
Brazilian Journal of Chemical Engineering. Publicado em: 2009-03
-
14. Hydrological regionalization of flows and loads of total suspend solids for the program Producers of Water and the payment of environmental services. Case study of river basin Benevente, ES / Regionalização hidrológica de vazões e de cargas difusas de sólidos suspensos totais para o programa ProdutorES de Água e o pagamento de serviços ambientais. Estudo de caso: bacia hidrográfica do rio Benevente, ES
Systems of payment for environmental services of a catchment area can be economically attractive and ecologically important. Programs such as Producers of Water economically compensate owners upstream of the basin using the proper management of land use, and reforestation to prevent erosion, increased pollution loads diffuse and increase the availability and
Publicado em: 2009
-
15. Perovskitas contendo lantânio, ferro e cobalto - melhoramento de propriedades texturais via síntese por nanomoldagem e avaliação como catalisadores na redução de NO com CO
Mixed oxides with perovskite structure have high potential as catalysts in gas depollution processes and particularly in the abatement of nitrogen oxides (NOx). Such solids could be considered as a promising alternative for the replacement of noble metals based catalysts, whose use is predominant. Great flexibility of composition, easy synthesis, low cost an
Publicado em: 2008
-
16. CONCEPÇÃO, CONSTRUÇÃO E AVALIAÇÃO DE FOTORREATORES CATALISADOS NA DEGRADAÇÃO DE CARGA POLUENTE E AMOXICILINA EM EFLUENTE HOSPITALAR
The focus of this study was the application of advanced oxidation photoprocesses, heterogeneous photocatalysis and photo-Fenton, in the degradation of pollutant load and amoxicillin in wastewater from the University Hospital of Santa Maria (HUSM), evaluating the photoreactors performance in the degradation efficiency. In the hospital wastewater there is a wi
Publicado em: 2008
-
17. Potencial de aplicação do processo foto-fenton/solar como pré-tratamento de efluente da indústria de laticínios
Dairy wastewater is characterized by frequent episodes of drastic increases of organic content, giving rise to bulking filamentous bacteria and compromising the biological treatment process. This study reports the reduction of organic content of such wastewater by the application of the solar photo-Fenton process. For a wastewater containing 335, 2627 or 540
Química Nova. Publicado em: 2007
-
18. Cascatas de incertezas, impactos climáticos perigosos e negociações internacionais sobre mudança de clima global - um modelo exploratório / Cascatas de Incertezas, Impactos Climáticos Perigosos e Negociações Internacionais sobre Mudança de Clima Global : Um Modelo Exploratório
The problem of the global climate change only can to be solved through a long term process of international political coordination which the principal actors are the governments of the National States. The Kyoto Protocol is the first international agreement to control the greenhouse gas (GHG) emissions, and the others rounds of negotiations will happen throu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/06/2006
-
19. O duplo grau e os recursos
The present work aims to delimit the essential aspects of double degree of jurisdiction, analyzing it since its creation, in Brazil, up to the current stage of development. Double degree of jurisdiction will be studied in light of constitutional principles. Furthermore, this study will investigate whether or not the possibility of its extinction causes losse
Publicado em: 2006
-
20. Análise ambiental : reflexões sobre os processos de degradação ambiental no município de Bela Vista do Paraíso
Bela Vista do Paraíso borough, as well as others counties that make up the Paraná State?s North region, originated to do emphasis at coffee?s cultivation, what dispersed quickly around this space, become the great sensation of that moment. The quality of lands brought to this place poor families and contractors of industrial estates who didn?t linger to st
Publicado em: 2006
-
21. Public finances in Brazilian states: an evaluation of budget execution from 1995 to 2004 / As finanças públicas nos estados brasileiros: uma avaliação da execução orçamentária, no período de 1995 a 2004
In despite of the Federal Government has been sustaining the articulation of the federative pact by means of financial support of states, the 1988 Constitution consolidated the weak budget restrictions in national fields that contributed to an ineffective fiscal administration resulting in primary deficits and continuous growth of state debts participating i
Publicado em: 2006
-
22. Removal of heavy metal from polluted river water using aquatic macrophytes Salvinia sp
Concentrations of trace metallic element as well as macronutrients were measured in water and plants from pond water. The aquatic macrophyte Salvinia sp. was evaluated for its trace metals removal potential in river water under laboratory conditions. The experiment were performed using several healthy acclimatized plants Salvinia sp. The water and grown plan
Brazilian Journal of Physics. Publicado em: 2005-09
-
23. A Cu/Al-MCM-41 mesoporous molecular sieve: application in the abatement of no in exhaust gases
Propane oxidation and reduction of NO to N2 with propane under oxidative conditions on a Cu-Al-MCM-41 mesoporous molecular sieve and Cu-ZSM-5 zeolites were studied. Both types of catalysts were prepared by ion exchange in aqueous solutions of copper acetate and characterised by X-ray diffraction (XRD), nitrogen sorption measurement, diffuse reflectance ultra
Brazilian Journal of Chemical Engineering. Publicado em: 2005-09
-
24. Análise da eficiência da várzea do ribeirão Parelheiros na melhoria de qualidade das águas que afluem à represa do Guarapiranga, São Paulo / Analysis of the performance of the wetlands of the Parelheiros creek in the improvement of the quality of the waters before they enter the Guarapiranga reservoir, São Paulo
The wetlands formed by Parelheiros creek were the focal point of this study. The creek is a water body that receives waters imported from Billings reservoir into Guarapiranga reservoir. The referred creek and associated wetlands also receive waters with diffuse source pollutants from inside and outside of the Guarapiranga watershed. This applied research wor
Publicado em: 2005