Publicações - engenharias
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Marcos Manfrin de Oliveira;
Paulo Henrique Trombetta Zannin
Palavra-chave:
AMBIENTE CONSRUÍDO;
conforto acústico;
tempo de reverberação
Áreas do conhecimento:
Engenharias; Engenharia Mecânica; ACÚSTICA DE EDIFICAÇÕES
resumo ...
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Didier Marie Jacques Joel Pitrat;
Maria Cristina Borba Braga
VertigO: la revue electronique en sciences de l'environnement,
n. Volume 12 Numéro 1,
p. 1-8,
2012
DOI
Home page
Palavra-chave:
metal contaminaton;
water resource;
contamination indices;
chromium;
Statistical analysis
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Telecomunicações;
Engenharias; Engenharia Sanitária; Recursos Hídricos; Planejamento Integrado dos Recursos Hídricos;
Engenharias; Engenharia Sanitária; Recursos Hídricos; Modelamento da Qualidade da Água
resumo ...
(en)
Like many watercourses close to urbanized areas in Brazil, the Passauna River and its reservoir supplying the city of Curitiba suffers from organic pollution due to growing anthropogenic pressure. However, a recent study has detected a surprising enrichment of the sediments by Pb (> 100 ppm) and Cr (> 200 ppm), despite this basin’s protection against industrial pollution. The objective of this study was to assess the reality of this pollution and to understand the nature of the polluting sources. Measurements of trace metals were performed in water and sediments sampled in this basin, using trace-metal clean techniques and supplemented by grain-size and total organic carbon (TOC) analysis for sediments samples. The interpretation of the results has been supported by the calculation of contamination indexes (Enrichment Factor, Geo-accumulation Index) and the use of statistical analysis tools (correlation, PCA). This work showed that a former municipal landfill, located along the bank of the river, had a light and localized impact on the sediments with Cu, Pb and Zn. No impact with Pb has been recorded in the rest of the study area, but a geogenic source explaining the enrichment of superficial sediments with Cr has been detected in the lower part of the river and entrance of the reservoir.
(fr)
Comme beaucoup de cours d’eau proches des régions urbanisées au Brésil, la rivière du Passauna et son réservoir d’eau alimentant la ville de Curitiba souffrent d’un problème de pollution organique sous l’effet d’une pression anthropique croissante. Par ailleurs, une étude récente a détecté un phénomène surprenant d’enrichissement des sédiments par du plomb (>100 ppm) et du chrome (>200 ppm), malgré les mesures prises pour protéger ce bassin contre la pollution industrielle. Le présent travail a cherché à vérifier la réalité de cette pollution métallique et à comprendre la nature des sources polluantes. Des mesures d’éléments traces métalliques (ETM) ont été effectuées dans l’eau et les sédiments au moyen de techniques propres, complétées par des analyses granulométriques et de carbone organique total (COT) dans les sédiments. L’interprétation des résultats s’est appuyée sur le calcul d’indices de contamination (Facteur d’enrichissement et Index de géo-accumulation) et d’outils d’analyse statistique (corrélation, ACP) pour identifier l’origine des métaux traces ayant enrichi les sédiments. Ce travail a montré qu’une ancienne décharge municipale, située en bordure de la rivière, avait un impact modéré et localisé sur les sédiments pour Cu, Pb et Zn. Sur le reste de la zone d’étude, aucun autre impact par le Pb n’a été constaté, mais les résultats obtenus indiquent l’existence d’une source géogénique diffuse enrichissant les sédiments superficiels avec du Cr dans la partie inférieure de la rivière et l’entrée du réservoir.
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Sippel, J. F.;
Ana Sofia Climaco Monteiro D'Oliveira
Palavra-chave:
Plasma Transferred Arc;
surface tailoring;
intermetallic coatings
resumo ...
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LEANDRO DOS SANTOS COELHO;
Viviana Cocco Mariani
Palavra-chave:
sistemas caóticos;
controle PID
Áreas do conhecimento:
Engenharias; Inteligência Computacional;
Engenharias; Engenharia Elétrica; Eletrônica Industrial, Sistemas e Controles Eletrônicos; Controle de Processos Eletrônicos, Retroalimentação
resumo ...
Nowadays, a variety of controllers used in process industries are still of the proportional–integral–derivative (PID) types. PID controllers have the …
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Ana Carolina Greef;
Maria do Carmo Duarte Freitas
Palavra-chave:
Fluxo enxuto de informação;
Criterios de qualidade;
mentalidade enxuta;
Avaliação de fluxo de informação
resumo ...
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Marcelo Henrique Farias de Medeiros;
Marcelo Henrique Farias de Medeiros;
Janine Alicia Groenwold;
Carlos Gustavo Nastari Marcondes;
HELENE, P
Hormigón y Acero,
v. 63,
p. 57-66,
2012
Palavra-chave:
adição mineral;
Pozolana;
Cloretos;
Durabilidade;
concreto armado
Áreas do conhecimento:
Engenharias; Construção Civil; Durabilidade;
Engenharias; Engenharia Civil; Construção Civil; Materiais e Componentes de Construção;
Engenharias; Engenharia Civil; Estruturas; Estruturas de Concreto
resumo ...
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Leonardo Trigueiro dos Santos;
Edgar Leite dos Santos Filho;
LEANDRO DOS SANTOS COELHO
Palavra-chave:
máquinas de vetor de suporte
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Identificação de Sistemas
resumo ...
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Flávio Issao Kubota;
Leandro Cantorski da Rosa
Palavra-chave:
Theory of Inventive Problem Solving;
Cleaner Production;
Dairy Industry;
Productive Processes
Áreas do conhecimento:
Engenharias; Produção mais limpa e Eco-Eficiência
resumo ...
The search for innovative solutions to support the growing need for cleaner industrial operations is an example of a problem solving process. Because …
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Froehner, S.;
Daniele Botelho de Souza;
Karina Scurupa Machado;
Falcão, F.;
Cristovão Vicente Scapulatempo Fernandes;
Bleninger, T.;
Neto, D. M.
Palavra-chave:
organic matter;
surface sediments;
sediments quality
Áreas do conhecimento:
Engenharias; Engenharia Sanitária; Saneamento Ambiental; Qualidade do Ar, das Águas e do Solo;
Engenharias; Engenharia Sanitária; Recursos Hídricos; Planejamento Integrado dos Recursos Hídricos;
Engenharias; Engenharia Civil; Engenharia Hidráulica; Hidrologia
resumo ...
The evaluation of potential environmental impacts from polycyclic aromatic hydrocarbon is a subject that requires investigation, especially related to emission sources from highway roads with high traffic. In this paper, the distribution of polycyclic aromatic hydrocarbons was investigated in the surface sediments from a subtropical lake, located in the south of Brazil and away from urban areas. The results showed that all sediments presented such compounds in significant concentration, ranging from 9.50 to 29.88 μg/g. The highest total concentration was found in those sites close to the highway (bridges) and the deepest area of the lake. Moreover, a high concentration of polycyclic aromatic hydrocarbons of high molecular weight, such as benzo(a)anthracene and dibenzo(a,h)anthracene was found. It was laso found that high concentrations might be related to asphalt and coal tar pavement used in the highway construction close to the lake. In addition, the potential capacity of sediment toxicity was compared with values of the interim sediment quality guidelines values. The results indicate that most of the sediment presents concentrations of hydrocarbons above these limits. Only fluoranthene and chrysene were found in concentrations below the guideline values. The concentrations of most of the polycyclic hydrocarbons are higher than the quality guidelines. However, the main concern is associated with the presence of benzo(a)anthracene whose concentration is 416 times higher than the limit establisehed by guidelines. The same observation can be done to traces of benzo(a)pyrene and dibenz(a,h)anthracene, with concentration values of 13 and 1,993 times higher.
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Sandro Froehner;
Daniele Botelho de Souza;
Karina Scurupa Machado;
Falcão, F.;
Cristovão Vicente Scapulatempo Fernandes;
Tobias Bernward Bleninger;
Neto, D. M.
Palavra-chave:
Hidrocarbonetos de petróleo;
óleo diesel;
Sedimentos
Áreas do conhecimento:
Ciências Exatas e da Terra; Química Ambiental;
Engenharias; Engenharia Sanitária; Saneamento Ambiental; Qualidade do Ar, das Águas e do Solo
resumo ...
The evaluation of potential environmental impacts from polycyclic aromatic hydrocarbon is a subject that requires investigation, especially related to emission sources from highway roads with high traffic. In this paper, the distribution of polycyclic aromatic hydrocarbons was investigated in the surface sediments from a subtropical lake, located in the south of Brazil and away from urban areas. The results showed that all sediments presented such compounds in significant concentration, ranging from 9.50 to 29.88 μg/g. The highest total concentration was found in those sites close to the highway (bridges) and the deepest area of the lake. Moreover, a high concentration of polycyclic aromatic hydrocarbons of high molecular weight, such as benzo(a)anthracene and dibenzo(a,h)anthracene was found. It was laso found that high concentrations might be related to asphalt and coal tar pavement used in the highway construction close to the lake. In addition, the potential capacity of sediment toxicity was compared with values of the interim sediment quality guidelines values. The results indicate that most of the sediment presents concentrations of hydrocarbons above these limits. Only fluoranthene and chrysene were found in concentrations below the guideline values. The concentrations of most of the polycyclic hydrocarbons are higher than the quality guidelines. However, the main concern is associated with the presence of benzo(a)anthracene whose concentration is 416 times higher than the limit establisehed by guidelines. The same observation can be done to traces of benzo(a)pyrene and dibenz(a,h)anthracene, with concentration values of 13 and 1,993 times higher.
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