Pollutant Inorganic
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Analysis of Composite Membranes in the Separation of Emulsions Sunflower oil/water
Oil is a major pollutant of water resources, affects aquatic life, causing environmental degradation. Currently there is an increase in studies of membrane applied to separation of oil-water. Among these membranes, there are composite membranes, which show as main characteristic an association of organic and inorganic membrane properties. In a tangential flo
Mat. Res.. Publicado em: 18/05/2017
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2. Method for determining the photocatalytic potential of portland cement mortar containing TiO2 for decomposing the pollutant nitrogen monoxide
Photocatalytic materials can minimize atmospheric pollution by decomposing certain organic and inorganic pollutants using sunlight as an energy source. In this paper, the development of a methodology to measure the photocatalytic potential of mortar containing TiO2 nanoparticles is reported. The results indicate that up to 40% of NOx can be degraded by Portl
Quím. Nova. Publicado em: 2014-07
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3. Determinação da concentração de elementos químicos potencialmente tóxicos em aerossóis presentes no interior de uma pequena indústria de fundição de metais, utilizando amostrador temporal e a técnica de fluorescência de raios X / Toxic inorganic elements content in suspended particulate matter inside a small foundry plant by streaker sampler and energy dispersive X-ray fluorescence technique
The aim of this work was to evaluate the chemical concentration of some potentially toxic inorganic chemical elements and the time profiles in fine (PM2.5, particles up to 2.5 m) and coarse (PM2.5-10, particles from 2.5 to 10 m) suspended particulate matter (SPM) inside a small foundry plant - bronze, iron and aluminium -, in which at high concentrations tur
Publicado em: 2009
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4. Migration of pollutant inorganic through composite liners / Migração de poluentes inorgânicos em liners compostos
This research analyzes the behavior of two sets of liners subjected to the percolation of KCLsolution. Samples of compacted soil from Corumbataí Formation, combined with a geosynthetic clay liner (GCL) of brazilian manufacture were used. Column percolation tests were used in two specimens, in the settings: compacted soil above the GCL and compacted soil bel
Publicado em: 2009
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5. Preparation, characterization and aplication of anodes of nominal composition Ti/RuyTi(1-y-x)SnxO2 in the degradation electrochemical of chlorophenols / Preparação, caracterização e aplicação de ânodos de composição nominal Ti/RuyTi(1-y-x)SnxO2 na degradação eletroquímica de clorofenóis
In this work oxides electrodes of nominal composition Ti/RuyTi(1-y-x)SnxO2 were prepared by thermal decomposition (400 °C) by three different routes: Traditional Method using inorganic precursors dissolved in either Isopropanol (MT/ISO) or a solution of HCl 1:1 (v/v) (MT/HCl) and the Polymeric Precursors Method (MPP).Oxides coatings were characterized by Sc
Publicado em: 2007
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6. Estudo da remoção de nitrogênio via nitrito e via nitrato em sistemas de lodo ativado alimentados por despejo com elevada concentração de fenol. / Study of nitrogen removal via nitrite and via nitrate in activated sludge systems fed by wastewater with high phenol concentration.
Wastewaters containing high phenol and ammonium concentrations present a great pollutant potential to the environment. An example of this kind of effluent is the discharge of coke-plants, which presents, quantitatively, the phenols as the main organic compound. Inorganic compounds are also present in these wastewaters and are mainly cyanide, thiocyanate, sul
Publicado em: 2007
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7. Caracterization and oxidation of organic compounds in wastewater from wet processing of coffee berries. / CaracterizaÃÃo e oxidaÃÃo de compostos orgÃnicos nas Ãguas residuÃrias da despolpa Ãmida dos frutos do cafeeiro.
The wet processing of coffee berry is one of the most pollutant activities in brazilian agriculture. The main disadvantage of this method is the large volume of water used, wich returns to the environment with low quality. The goal of this work was to study the organic composition of the wastewater, as well as to prepare and test catalysts in order to oxidiz
Publicado em: 2006
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8. Acumulação de Poluentes Inorgânicos por Macrófitas Aquáticas nos Reservatórios de Santana e Vigário, Barra do Piraí-RJ / Accumulation of Pollutant Inorganic for Aquatic Macrophytes in Santana and Vigario Reservoir, Barra do Pirai-RJ
Paraíba do Sul River (1,145 km long) crosses three of the most important and developed states of Brazil: Minas Gerais, São Paulo and Rio de Janeiro. It is the main water supply for more than 11 million people in Rio de Janeiro City, and it is also used extensively as a waste disposal system by industrial facilities in all three states. Moreover it receives
Publicado em: 2004
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9. Níveis de ocorrência de Hg total em peixes carnívoros das represas de Barra Bonita e Bariri, em função da variação de parâmetros biológicos e da presença de selênio.
The Barra Bonita and Bariri reservoirs, Medium river Tietê, São Paulo, Brazil, are used with several purposes as transport, provisioning, electric power generation, professional fishery and leisure. The region is surrounded by an industrial developed pole, receiving sewer of domestic and industrial origin, as well as the effluents of agricultural activitie
Publicado em: 2004
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10. ASSESSMENT OF MERCURY (II) SPECIES BIOAVAILABILITY USING A BIOLUMINESCENT BACTERIAL BIOSENSOR
Mercury and its compounds are highly toxic, especially methylmercury - a potent neurotoxin. It has caused a significant number of human fatalities in several accidents around the world. Due to its wide dispersion through the atmosphere, mercury is considered a global pollutant, being deposited even in remote pristine aquatic systems, where it is biomagnified
Publicado em: 2003
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11. Eletrochemical treatament of the cyanide wastewater using commercial noble metal oxide electrodes / Tratamento eletroquimico de efluentes cianidricos usando eletrodos comerciais de oxidos de metais nobres
Inorganic cyanide is still in use in the metal finishing industry and in the mining activities of noble metals extraction and refining. Gold and silver are extracted from its ores as cyanidric complexes. The intensive industrial use of cyanide complexes is responsible for the generation of high toxicity aqueous streams, which present high oxygen demand. The
Publicado em: 2001