Elba Teixeira - Academia.edu (original) (raw)

Papers by Elba Teixeira

Research paper thumbnail of Methodology for Acquisition of Intensity Data in Forest Targets Using Terrestrial Laser Scanner

Research paper thumbnail of Nano-mineralogy of suspended sediment during the beginning of coal rejects spill

Research paper thumbnail of Polycyclic aromatic hydrocarbons study in atmospheric fine and coarse particles using diagnostic ratios and receptor model in urban/industrial region

Environmental Monitoring and Assessment, 2013

Research paper thumbnail of Estimated atmospheric emissions from biodiesel and characterization of pollutants in the metropolitan area of Porto Alegre-RS

Anais da Academia Brasileira de Ciências, 2012

The purpose of the present study was to estimate emissions of some pollutants (CO, NOX, HC, SOX, ... more The purpose of the present study was to estimate emissions of some pollutants (CO, NOX, HC, SOX, and PM) in diesel fleet due to the addition of biodiesel in different blends, as well as to assess atmospheric pollutant concentrations in the metropolitan area of Porto Alegre (MAPA). The methodology was based on inventories from mobile sources based on US EPA's technical report. Regarding air quality the following parameters were determined: PM10, PM2.5, CO, NOX, O3, SO2, HC and PAHs. The results showed a decrease for emissions PM, CO, and HC, and a slight increase for NOX. The characterization of atmospheric pollutants in the metropolitan area of Porto Alegre showed that they are influenced by mobile sources, particularly diesel vehicles. The diagnosis of ratios analysis that was applied to facilitate the identification of sources of PAHs, indicated an influence of diesel oil.

Research paper thumbnail of Aerosols concentration in the Candiota area applying different gravimetric methods of sampling and numeric modelling

Journal of Environmental Monitoring, 2002

The main purpose of the present work is to study the concentration of atmospheric particles in th... more The main purpose of the present work is to study the concentration of atmospheric particles in the Candiota region, in the state of Rio Grande do Sul, where the Presidente Médici coal power plant is located. Aerosol samples were collected at the studied locations between December 2000 and December 2001 during 24 h periods at 15 day intervals using HV PM10 and dichotomous samplers. Then, the values obtained with the ISCST (Industrial Source Complex Term) model, with the HV PM10 sampler at all studied stations, and with the dichotomous sampler at the 8 de Agosto station were compared with each other. The results show that the values for the model had been underestimated in relation to the HV PM10 data for the studied stations, but agreed with the values obtained with the dichotomous sampler.

Research paper thumbnail of Chemical characterization, nano-particle mineralogy and particle size distribution of basalt dust wastes

The Science of the total environment, 2016

Understanding the geochemistry of basalt alteration is central to the study of agriculture system... more Understanding the geochemistry of basalt alteration is central to the study of agriculture systems. Various nano-minerals play an important role in the mobilization of contaminants and their subsequent uptake by plants. We present a new analytical experimental approach in combination with an integrated analytical protocol designed to study basalt alteration processes. Recently, throughout the world, ultra-fine and nano-particles derived from basalt dust wastes (BDW) during "stonemeal" soil fertilizer application have been of great concern for their possible adverse effects on human health and environmental pollution. Samples of BDW utilized were obtained from companies in the Nova Prata mining district in southern Brazil for chemical characterization and nano-mineralogy investigation, using an integrated application of advanced characterization techniques such as X-ray diffraction (XRD), High Resolution-Transmission Electron microscopy (HR-TEM)/Energy Dispersive Spectrosco...

Research paper thumbnail of Estimated Atmospheric Emissions from Mobile Sources and Assessment of Air Quality in The Urban Area

Research paper thumbnail of Avaliação do impacto da resolução espacial de modelos digitais de elevação sobre a estimativa de formação de ozônio superficial usando Models-3

Revista Brasileira de Medicina do Esporte, 2009

Research paper thumbnail of Análises seqüenciais de agrupamentos aplicadas ao estudo de partículas atmosféricas

Química Nova, 2002

ABSTRACT The present paper has as objective to apply a sequential Cluster Analysis to the atmosph... more ABSTRACT The present paper has as objective to apply a sequential Cluster Analysis to the atmospheric particles: Hierarchical Cluster Analysis followed by Nonhierarchical Cluster Analysis. The hierarchical cluster analysis results were used as start point for the nonhierarchical cluster analysis as an agglomerative technique. These particles were taken from two areas of the metropolitan region of Porto Alegre, Charqueadas and Sapucaia do Sul., from may /97 to may/98, using a High Volume Sampler (Hi-Vol). Around 10,000 particles were analysed by Scanning Electron Microscope with Energy-Dispersive X-Ray microanalysis (SEM-EDS). The Hierarchical Cluster Analysis allowed the identification of five groups of particles, whose amounts were differentiated according to the summer and the winter campaigns. The abundance of each type of particles inside each group according to the different sections was verified by the Nonhierarchical Cluster Analysis, resulting in information about the emissions sources. The groups of particles of Si/Al and Si and of Fe/Zn and Fe for Charqueadas were more significant in section 2 and 3 (NW and W wind directions) and in section 1 (SE wind direction), evidencing the influence of the coal power plant and steel industry, respectively located in these quadrants. In Sapucaia do Sul the data were more heterogeneous, causing a certain difficulty to identify the source as anthropogenic. Nevertheless the group of particles containing Fe was found in sectors of NW/W wind directions which shows the influence of the steel plant.

Research paper thumbnail of Evaluation of the Atmospheric Deposition in an Urban Region in South Brazil

Water, Air, and Soil Pollution, 2005

... JOSETE DANI SANCHEZ2, JANDYRA FACHEL3 and MARIANA RIBEIRO3 1Fundaç ˜ao Estadual de Proteç ˜ao... more ... JOSETE DANI SANCHEZ2, JANDYRA FACHEL3 and MARIANA RIBEIRO3 1Fundaç ˜ao Estadual de Proteç ˜ao Ambiental, Rua Carlos Chagas 55/802, 90030-020, Porto Alegre, RS, Brazil; 2Fundaç ˜ao de Ciência e Tecnologia, Rua Washington Luiz, 675, 90010-460, Porto ...

Research paper thumbnail of Composição química da precipitação atmosférica no sul do Brasil: estudo preliminar

Research paper thumbnail of Caracterização hidrogeoquímica de água subterrânea em área de influência de futuras instalações de usinas hidrelétricas: bacia hidrográfica do rio Taquari-Antas/RS, Brasil

Química Nova, 2005

*e-mail: gerpro.pesquisa@fepam.rs.gov.br ... CARACTERIZAÇÃO HIDROGEOQUÍMICA DE ÁGUA SUBTERRÂNEA E... more *e-mail: gerpro.pesquisa@fepam.rs.gov.br ... CARACTERIZAÇÃO HIDROGEOQUÍMICA DE ÁGUA SUBTERRÂNEA EM ÁREA DE INFLUÊNCIA DE FUTURAS INSTALAÇÕES DE USINAS HIDRELÉTRICAS – BACIA HIDROGRÁFICA DO RIO TAQUARI-ANTAS/RS, BRASIL

Research paper thumbnail of Estudo de aerossóis atmosféricos e aplicação de modelos numéricos

Química Nova, 2004

ABSTRACT

Research paper thumbnail of Utilização de modelagem numérica para o estudo da dispersão de poluentes emitidos pela usina termoelétrica Presidente Médici

Química Nova, 2007

*e-mail: gerpro.pesquisa@fepam.rs.gov.br ... UTILIZAÇÃO DE MODELAGEM NUMÉRICA PARA O ESTUDO DA DI... more *e-mail: gerpro.pesquisa@fepam.rs.gov.br ... UTILIZAÇÃO DE MODELAGEM NUMÉRICA PARA O ESTUDO DA DISPERSÃO DE POLUENTES EMITIDOS PELA USINA TERMOELÉTRICA PRESIDENTE MÉDICI ... Sheila Radann Paz e Rita Cássia Marques Alves Centro Estadual de ...

Research paper thumbnail of Characterization of wet precipitation by X-ray diffraction (XRD) and scanning electron microscopy (SEM) in the metropolitan area of Porto Alegre, Brazil

Journal of Hazardous Materials, 2009

Research paper thumbnail of Geochemical distribution of trace elements in Leao coal, Brazil

Research paper thumbnail of Metallic elements and isotope of Pb in wet precipitation in urban area, South America

Atmospheric Research, 2012

Research paper thumbnail of Study of nitro-polycyclic aromatic hydrocarbons in fine and coarse atmospheric particles

Atmospheric Research, 2011

RefDoc Bienvenue - Welcome. Refdoc est un service / is powered by. ...

Research paper thumbnail of Study of the chemical elements and polycyclic aromatic hydrocarbons in atmospheric particles of PM10 and PM2.5 in the urban and rural areas of South Brazil

Atmospheric Research, 2008

The purpose of this work is to study the chemical elements and PAHs associated with atmospheric p... more The purpose of this work is to study the chemical elements and PAHs associated with atmospheric particulate in samples of PM10 collected in the Metropolitan Area of Porto Alegre—MAPA, Rio Grande do Sul, Brazil. In addition, to study the chemical elements associated with particles of different fractions of PM10–2.5 and PM2.5 using dichotomous sampling, in urban (MAPA) and rural areas.

Research paper thumbnail of Polycyclic aromatic hydrocarbons in atmospheric particles in the metropolitan area of Porto Alegre, Brazil

Atmospheric Environment, 2005

... Martin d'H`eres, France * Now at: LaMP, CNRS, Université Blaise Pascal, 14 avenue des Lan... more ... Martin d'H`eres, France * Now at: LaMP, CNRS, Université Blaise Pascal, 14 avenue des Landais, 63177 Aubi`ere, France ... This fraction is composed of many compounds which constitute the organic carbon (OC) and elemental carbon (EC) (Penner and Novakov, 1996). ...

Research paper thumbnail of Methodology for Acquisition of Intensity Data in Forest Targets Using Terrestrial Laser Scanner

Research paper thumbnail of Nano-mineralogy of suspended sediment during the beginning of coal rejects spill

Research paper thumbnail of Polycyclic aromatic hydrocarbons study in atmospheric fine and coarse particles using diagnostic ratios and receptor model in urban/industrial region

Environmental Monitoring and Assessment, 2013

Research paper thumbnail of Estimated atmospheric emissions from biodiesel and characterization of pollutants in the metropolitan area of Porto Alegre-RS

Anais da Academia Brasileira de Ciências, 2012

The purpose of the present study was to estimate emissions of some pollutants (CO, NOX, HC, SOX, ... more The purpose of the present study was to estimate emissions of some pollutants (CO, NOX, HC, SOX, and PM) in diesel fleet due to the addition of biodiesel in different blends, as well as to assess atmospheric pollutant concentrations in the metropolitan area of Porto Alegre (MAPA). The methodology was based on inventories from mobile sources based on US EPA's technical report. Regarding air quality the following parameters were determined: PM10, PM2.5, CO, NOX, O3, SO2, HC and PAHs. The results showed a decrease for emissions PM, CO, and HC, and a slight increase for NOX. The characterization of atmospheric pollutants in the metropolitan area of Porto Alegre showed that they are influenced by mobile sources, particularly diesel vehicles. The diagnosis of ratios analysis that was applied to facilitate the identification of sources of PAHs, indicated an influence of diesel oil.

Research paper thumbnail of Aerosols concentration in the Candiota area applying different gravimetric methods of sampling and numeric modelling

Journal of Environmental Monitoring, 2002

The main purpose of the present work is to study the concentration of atmospheric particles in th... more The main purpose of the present work is to study the concentration of atmospheric particles in the Candiota region, in the state of Rio Grande do Sul, where the Presidente Médici coal power plant is located. Aerosol samples were collected at the studied locations between December 2000 and December 2001 during 24 h periods at 15 day intervals using HV PM10 and dichotomous samplers. Then, the values obtained with the ISCST (Industrial Source Complex Term) model, with the HV PM10 sampler at all studied stations, and with the dichotomous sampler at the 8 de Agosto station were compared with each other. The results show that the values for the model had been underestimated in relation to the HV PM10 data for the studied stations, but agreed with the values obtained with the dichotomous sampler.

Research paper thumbnail of Chemical characterization, nano-particle mineralogy and particle size distribution of basalt dust wastes

The Science of the total environment, 2016

Understanding the geochemistry of basalt alteration is central to the study of agriculture system... more Understanding the geochemistry of basalt alteration is central to the study of agriculture systems. Various nano-minerals play an important role in the mobilization of contaminants and their subsequent uptake by plants. We present a new analytical experimental approach in combination with an integrated analytical protocol designed to study basalt alteration processes. Recently, throughout the world, ultra-fine and nano-particles derived from basalt dust wastes (BDW) during "stonemeal" soil fertilizer application have been of great concern for their possible adverse effects on human health and environmental pollution. Samples of BDW utilized were obtained from companies in the Nova Prata mining district in southern Brazil for chemical characterization and nano-mineralogy investigation, using an integrated application of advanced characterization techniques such as X-ray diffraction (XRD), High Resolution-Transmission Electron microscopy (HR-TEM)/Energy Dispersive Spectrosco...

Research paper thumbnail of Estimated Atmospheric Emissions from Mobile Sources and Assessment of Air Quality in The Urban Area

Research paper thumbnail of Avaliação do impacto da resolução espacial de modelos digitais de elevação sobre a estimativa de formação de ozônio superficial usando Models-3

Revista Brasileira de Medicina do Esporte, 2009

Research paper thumbnail of Análises seqüenciais de agrupamentos aplicadas ao estudo de partículas atmosféricas

Química Nova, 2002

ABSTRACT The present paper has as objective to apply a sequential Cluster Analysis to the atmosph... more ABSTRACT The present paper has as objective to apply a sequential Cluster Analysis to the atmospheric particles: Hierarchical Cluster Analysis followed by Nonhierarchical Cluster Analysis. The hierarchical cluster analysis results were used as start point for the nonhierarchical cluster analysis as an agglomerative technique. These particles were taken from two areas of the metropolitan region of Porto Alegre, Charqueadas and Sapucaia do Sul., from may /97 to may/98, using a High Volume Sampler (Hi-Vol). Around 10,000 particles were analysed by Scanning Electron Microscope with Energy-Dispersive X-Ray microanalysis (SEM-EDS). The Hierarchical Cluster Analysis allowed the identification of five groups of particles, whose amounts were differentiated according to the summer and the winter campaigns. The abundance of each type of particles inside each group according to the different sections was verified by the Nonhierarchical Cluster Analysis, resulting in information about the emissions sources. The groups of particles of Si/Al and Si and of Fe/Zn and Fe for Charqueadas were more significant in section 2 and 3 (NW and W wind directions) and in section 1 (SE wind direction), evidencing the influence of the coal power plant and steel industry, respectively located in these quadrants. In Sapucaia do Sul the data were more heterogeneous, causing a certain difficulty to identify the source as anthropogenic. Nevertheless the group of particles containing Fe was found in sectors of NW/W wind directions which shows the influence of the steel plant.

Research paper thumbnail of Evaluation of the Atmospheric Deposition in an Urban Region in South Brazil

Water, Air, and Soil Pollution, 2005

... JOSETE DANI SANCHEZ2, JANDYRA FACHEL3 and MARIANA RIBEIRO3 1Fundaç ˜ao Estadual de Proteç ˜ao... more ... JOSETE DANI SANCHEZ2, JANDYRA FACHEL3 and MARIANA RIBEIRO3 1Fundaç ˜ao Estadual de Proteç ˜ao Ambiental, Rua Carlos Chagas 55/802, 90030-020, Porto Alegre, RS, Brazil; 2Fundaç ˜ao de Ciência e Tecnologia, Rua Washington Luiz, 675, 90010-460, Porto ...

Research paper thumbnail of Composição química da precipitação atmosférica no sul do Brasil: estudo preliminar

Research paper thumbnail of Caracterização hidrogeoquímica de água subterrânea em área de influência de futuras instalações de usinas hidrelétricas: bacia hidrográfica do rio Taquari-Antas/RS, Brasil

Química Nova, 2005

*e-mail: gerpro.pesquisa@fepam.rs.gov.br ... CARACTERIZAÇÃO HIDROGEOQUÍMICA DE ÁGUA SUBTERRÂNEA E... more *e-mail: gerpro.pesquisa@fepam.rs.gov.br ... CARACTERIZAÇÃO HIDROGEOQUÍMICA DE ÁGUA SUBTERRÂNEA EM ÁREA DE INFLUÊNCIA DE FUTURAS INSTALAÇÕES DE USINAS HIDRELÉTRICAS – BACIA HIDROGRÁFICA DO RIO TAQUARI-ANTAS/RS, BRASIL

Research paper thumbnail of Estudo de aerossóis atmosféricos e aplicação de modelos numéricos

Química Nova, 2004

ABSTRACT

Research paper thumbnail of Utilização de modelagem numérica para o estudo da dispersão de poluentes emitidos pela usina termoelétrica Presidente Médici

Química Nova, 2007

*e-mail: gerpro.pesquisa@fepam.rs.gov.br ... UTILIZAÇÃO DE MODELAGEM NUMÉRICA PARA O ESTUDO DA DI... more *e-mail: gerpro.pesquisa@fepam.rs.gov.br ... UTILIZAÇÃO DE MODELAGEM NUMÉRICA PARA O ESTUDO DA DISPERSÃO DE POLUENTES EMITIDOS PELA USINA TERMOELÉTRICA PRESIDENTE MÉDICI ... Sheila Radann Paz e Rita Cássia Marques Alves Centro Estadual de ...

Research paper thumbnail of Characterization of wet precipitation by X-ray diffraction (XRD) and scanning electron microscopy (SEM) in the metropolitan area of Porto Alegre, Brazil

Journal of Hazardous Materials, 2009

Research paper thumbnail of Geochemical distribution of trace elements in Leao coal, Brazil

Research paper thumbnail of Metallic elements and isotope of Pb in wet precipitation in urban area, South America

Atmospheric Research, 2012

Research paper thumbnail of Study of nitro-polycyclic aromatic hydrocarbons in fine and coarse atmospheric particles

Atmospheric Research, 2011

RefDoc Bienvenue - Welcome. Refdoc est un service / is powered by. ...

Research paper thumbnail of Study of the chemical elements and polycyclic aromatic hydrocarbons in atmospheric particles of PM10 and PM2.5 in the urban and rural areas of South Brazil

Atmospheric Research, 2008

The purpose of this work is to study the chemical elements and PAHs associated with atmospheric p... more The purpose of this work is to study the chemical elements and PAHs associated with atmospheric particulate in samples of PM10 collected in the Metropolitan Area of Porto Alegre—MAPA, Rio Grande do Sul, Brazil. In addition, to study the chemical elements associated with particles of different fractions of PM10–2.5 and PM2.5 using dichotomous sampling, in urban (MAPA) and rural areas.

Research paper thumbnail of Polycyclic aromatic hydrocarbons in atmospheric particles in the metropolitan area of Porto Alegre, Brazil

Atmospheric Environment, 2005

... Martin d'H`eres, France * Now at: LaMP, CNRS, Université Blaise Pascal, 14 avenue des Lan... more ... Martin d'H`eres, France * Now at: LaMP, CNRS, Université Blaise Pascal, 14 avenue des Landais, 63177 Aubi`ere, France ... This fraction is composed of many compounds which constitute the organic carbon (OC) and elemental carbon (EC) (Penner and Novakov, 1996). ...