Pollutant Degradation
Mostrando 25-36 de 54 artigos, teses e dissertações.
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25. Impactos do lançamento de efluentes na qualidade da água do riacho Mussuré
The main purpose of this study was the investigation of impacts of the disposal of industrial and domestic effluents on the quality of the water of a hydric body, considering the probable repercussions on the environment and on the health of the user population. The delimited study area was the Mussuré stream basin, which is located in the Gramame river bas
Publicado em: 2006
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26. Impactos do lançamento de efluentes na qualidade da água do riacho Mussuré
The main purpose of this study was the investigation of impacts of the disposal of industrial and domestic effluents on the quality of the water of a hydric body, considering the probable repercussions on the environment and on the health of the user population. The delimited study area was the Mussuré stream basin, which is located in the Gramame river bas
Publicado em: 2006
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27. 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
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28. RemediaÃÃo de solos contaminados por derivados de petrÃleo utilizando processo foto-fenton
In the manipulation of petroleum derivatives may occur the contamination of soil, because of leaks, spills and other accidents during the exploration, refining, transport and storage. Those accidents have been increasing in the last years due to the growing demand of energy of the country. Many of these pollutants are highly impactants for man and environmen
Publicado em: 2005
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29. A aÃÃo do Estado no (des)controle ambiental : o conflito entre as condiÃÃes operacionais e a ampliaÃÃo das atribuiÃÃes legais do ÃrgÃo estadual de meio ambiente de Pernambuco (a trajetÃria da CPRH)
When the United Nations held, in 1972, the Conference about Human Environment, the central capitalist Countries confront themselves with the crisis of the FordistâKeynsian model of development. From the 1970s on, it was seen the institutionalization of the environmental concern concomitant to the productive restoration process, which among other factors, im
Publicado em: 2004
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30. Evaluation of Nb2O5 and Ag/Nb2O5 in the photocatalytic degradation of dyes from textile industries
The textile industries are distinguished by the use of dyes that are applied to textiles. Dyes are pollutant materials that are difficult to decompose by microbiological treatment. An alternative way to prevent contamination of the environment by dyes is the oxidation of these materials through photocatalysis, a process by which illumination of an oxide semi
Brazilian Journal of Chemical Engineering. Publicado em: 2002-12
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31. Fungos degradadores de compostos organicos recalcitrantes sob condições microaerobia e anaerobia
The industrial activities of modern society produce great amounts of toxic compounds, which persist in rivers, soils and oceans, causing disturbance to ecosystems. Owing to an extracellular and non-specificenzymatic system produced by whiterot fungi, degradation of these xenobióticos became a viable alternative for environmental bioremediation. Such lignino
Publicado em: 2002
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32. Degradação fotoquímica de hidrocarbonetos da gasolina em efluentes aquosos / Photochemical degradation of the gasoline of hydrocarbons in wastewaters
Photo-oxidation processes of toxic organic compounds have been widely studied. This work seeks the application of the photo-Fenton process for the degradation of hydrocarbons in water. The gasoline found in the refinery, without additives and alcohol, was used as the model pollutant. The effects of the concentration of the following substances have been prop
Publicado em: 2002
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33. Crisotila na degradação de dodecilbenzenosulfonato de sodio
Catalytic properties of chrysotile, a mineral fibrous magnesium-silicate, were studied for sodium dodecylbenzenesulfonate (DBS) degradation, a typical pollutant in wastewater. AlI experiments were performed at least in sample and measurement triplicates. Preliminary results showed a depletion of 85% in the surfactant concentration ([DBS]0: 0.16x10 mol/L; 250
Publicado em: 1999
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34. A Previously Unexposed Forest Soil Microbial Community Degrades High Levels of the Pollutant 2,4,6-Trichlorophenol
2,4,6-Trichlorophenol (2,4,6-TCP) is a hazardous pollutant that is efficiently degraded by some aerobic soil bacterial isolates under laboratory conditions. The degradation of this pollutant in soils and its effect on the soil microbial community are poorly understood. We report here the ability of a previously unexposed forest soil microbiota to degrade hig
American Society for Microbiology.
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35. Microbial degradation of xenobiotic, aromatic pollutants in humic water.
The microbial degradation of a number of 14C-labeled, recalcitrant, aromatic pollutants, including trichloroguaiacol and di-, tri-, and pentachlorophenol, was investigated in aquatic model systems in the laboratory. Natural, mixed cultures of microorganisms in the water from a brown-water lake with a high content of humic compounds mineralized all of the tes
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36. Quantitation of fungal mRNAs in complex substrates by reverse transcription PCR and its application to Phanerochaete chrysosporium-colonized soil.
Thorough analysis of fungi in complex substrates has been hampered by inadequate experimental tools for assessing physiological activity and estimating biomass. We report a method for the quantitative assessment of specific fungal mRNAs in soil. The method was applied to complex gene families of Phanerochaete chrysosporium, a white-rot fungus widely used in