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| Registros recuperados: 46 | |
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| Sampaio,Silvio C.; Cilene,Kátia; Boas,Márcio A. Vilas; Queiroz,Manoel M. F. de; Gomes,Benedito M.; Fazolo,Ajadir. |
| O objetivo do trabalho foi avaliar a perda de carga em tubulações comerciais de aço zincado, ferro galvanizado e PVC, com diferentes diâmetros, com o intuito de determinar fatores de correção para a equação de Hazen-Williams em função da concentração de sólidos totais, em águas residuárias oriundas da suinocultura. Os resultados mostraram que a perda de carga possui comportamento linear em função da concentração de sólidos totais da água residuária proveniente da suinocultura; as perdas de carga determinadas a partir dos fatores de correção parcial e global, apresentaram superestimativa e subestimativa média de 0,7 e 13%, respectivamente. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reúso de água; Irrigação; Hidráulica. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662007000100001 |
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| Doblinski,André F.; Sampaio,Silvio C.; Silva,Vanderlei R. da; Nóbrega,Lúcia H. P.; Gomes,Simone D.; Dal Bosco,Tatiane C.. |
| In order to verify the environmental impact of the application of swine farming wastewater in bean crop, an experiment was set up in the Experimental Farm of PUCPR - Toledo, PR, Brazil. Runoff and soil samples were collected at the end of the experiment. Four wastewater treatments were utilized during the experiment (50, 100, 150 and 200 m³ ha-1) and the without wastewater as the control. The results demonstrate that (i) the amounts of potassium, phosphorus, and nitrogen in runoff are exponential, (ii) that phosphorus has a seven-fold polluting potential compared to potassium and three-fold compared to nitrogen, and (iii) that the mobility of potassium in the soil profile is the largest, followed by those of nitrogen and phosphorus. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water reuse; Runoff; Environmental pollution. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662010000100012 |
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| Herrmann,Daniela da R.; Sampaio,Silvio C.; Castaldelli,Ana P. A.; Tsutsumi,Claudio Y.; Prior,Maritane. |
| ABSTRACT Swine wastewater (SW) has high organic load, becoming an important source of macro and micronutrients to plants, promoting the improvement of soil quality and development in various cultures. However, when done without agronomic and environmental criteria, it can cause soil problems, nutrient leaching, water resource damage and plant toxicity. The objective of this study was to evaluate the soil chemical properties and the leachate in face of the association of swine wastewater and mineral fertilization (MF) in oat cultivation. An experiment in drainage lysimeter was carried out, using SW applications associated to MF or not, where treatments consisted of doses of 0, 100, 200 and 300 m3ha-1 with the absence or presence of MF, under field... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil fertility; Nutrient leaching; Drainage lysimeters. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000500799 |
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| Sampaio,Silvio C.; Caovilla,Francielle A.; Opazo,Miguel A. U.; Nóbrega,Lúcia H. P.; Suszek,Morgana; Smanhotto,Adriana. |
| Neste trabalho, foi avaliada a dinâmica da lixiviação de íons em colunas de solo deformado e indeformado. O solo utilizado era proveniente de área fertirrigada com água residuária da suinocultura diluída em 0%, 25%, 50%, 75% e cultivada com soja. Foram construídas curvas de eluição para nitrato, potássio e condutividade elétrica. De acordo com os resultados obtidos nas colunas de solo deformado, e proporcionalmente aos tratamentos, o nitrato apresentou maior mobilidade, seguido pela concentração de sais totais e do potássio. A metodologia de colunas de solo indeformado não se mostrou adequada, devido, possivelmente, à compactação do solo durante a amostragem e à dificuldade no bloqueio de caminhos preferenciais ao longo de toda a coluna. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Água residuária; Meio ambiente; Dinâmica de íons. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162010000100016 |
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| Maciel,Ana P. C.; Sampaio,Silvio C.; Remor,Marcelo B.; Rosa,Danielle M.; Reis,Ralpho R. Dos. |
| ABSTRACT Hog raising generates a large amount of residues that is commonly discarded into the soil as fertilizer even with environmental risks. In this context, the aim of this study was to assess the application effects of different doses of swine wastewater (SW) associated with mineral fertilization on the abundance and diversity of organisms of soil meso- and macrofauna in two soybean crops. Treatments consisted of four doses (0, 100, 200, and 300 m3 ha−1) of SW with or without mineral fertilization in two soybean crop, totaling 24 experimental units. Soil meso- and macrofauna were sampled using pitfall traps installed at each plot. Samples were sorted and the organisms were separated and identified. The highest abundances were found between groups of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mineral fertilization; Swine wastewater; Soil fauna. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300556 |
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| Cembranel,Adir S.; Frigo,Elisandro P.; Sampaio,Silvio C.; Mercante,Erivelto; Reis,Ralpho R. Dos; Remor,Marcelo B.. |
| ABSTRACT The knowledge of pesticide residual concentrations in the environment is important to understand the threats to the environment and human health, especially when natural resources are used for human consumption. In this context, this study aimed to assess the potential ecological risk and respective sources of sediment contamination by organochlorine and organophosphorus pesticides. The study site was an urban lake located in Cascavel city, western Paraná state, Brazil, where the history of land use and occupation in the urban environment is typically agricultural. Surface sediment samples were collected every three months from April 2010 to June 2013 at five different collection points, totaling 65 samples. Analyses showed that contamination by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agrochemicals; Ecological risk; Land use and occupation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601254 |
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| Conceição,Ketllin Z. da; Boas,Marcio A. Vilas; Sampaio,Silvio C.; Remor,Marcelo B.; Bonaparte,Danilo I.. |
| ABSTRACT Analyzing the physical-chemical and biological characteristics allows the evaluation of the water quality of a water body. Thus, the objective of this study was to determine the water quality index of the Passaúna and Piraquara rivers, as well as to apply statistical quality control methodologies to evaluate the data resulting from the monitoring of water quality. Therefore, a database with physico-chemical and microbiological parameters of the Passaúna and Piraquara rivers, a watershed of the Iguaçu River, belonging to the cities of Araucária and Piraquara, respectively Paraná, Brazil, was used to carry out the research. The water quality index was determined with the time series and, subsequently, these data were submitted to the statistical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water quality index; Control charts; Capacity of the process. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600951 |
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| Gonçalves,Morgana S.; Sampaio,Silvio C.; Coelho,Silvia R. M.; Suszek,Floriano L.; Cordovil,Claudia M. D. S.. |
| The effects of swine wastewater on atrazine dissipation and formation of bound residues in subtropical clay soil were investigated in this study. The experiment was carried out in laboratory, under room conditions, where samples of Rhodic Hapludox soil received 168.61 mg kg-1 of atrazine and were incubated for 60 days in the following treatments: T1 (sterilized soil + swine wastewater), T2 (sterilized soil + distilled water), T3 (Non sterilized soil + swine wastewater) and T4 (Non sterilized soil + distilled water). The extractable residues and bound residues of atrazine were extracted and analyzed by high performance liquid chromatography. The results showed no effect of swine wastewater on atrazine dissipation. However, the addition of swine wastewater... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicide; Degradation; Sorption; Organic matter. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000600017 |
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| Fruehwirth,Marcelo; Sbizzaro,Mariana; Rosa,Danielle M.; Sampaio,Silvio C.; Reis,Ralpho R. dos. |
| ABSTRACT Atrazine is a herbicide widely used in agriculture; however, because of its toxicity, alternatives are needed to remove this compound from the environment. In this study, we investigated the adsorption process and the atrazine-adsorbing ability of three biochars produced at different pyrolysis temperatures from byproducts of the wood industry. The biochars were characterized by Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), and their physical characteristics were evaluated by Brunauer-Emmett-Teller (BET) analysis. The biochar pyrolyzed at 350 °C (BM350) adsorbed 26.04% of the herbicide, showing the best performance among the three biochars tested, even though it had the lowest specific surface area (1.467 m2... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water contamination; Isotherm; Functional groups; Kinetics models. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000600769 |
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| Kolling,Evandro M.; Souza,Samuel N. M. de; Ricieri,Reinaldo P.; Sampaio,Silvio C.; Dallacort,Rivanildo. |
| O bombeamento de água é uma das atividades mais difundidas quanto ao emprego da energia solar fotovoltaica. Porém, apesar de se apresentar como alternativa interessante, o alto custo, a baixa eficiência dos sistemas e os projetos inadequados restringem sua aplicação. O uso racional, baseado na utilização mais eficiente de seus equipamentos, está vinculado ao conhecimento do comportamento operacional desses sistemas. No presente trabalho, teve-se o objetivo de avaliar o comportamento de um sistema fotovoltaico de bombeamento de água diretamente acoplado, sob diferentes condições de irradiância solar, por meio da montagem de uma bancada de testes, submetendo-o a diferentes alturas manométricas e determinando-se a vazão fornecida. A análise dos resultados... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irradiância solar; Carga de bombeamento; Vazão do sistema. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162004000300005 |
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| Cembranel,Adir S.; Sampaio,Silvio C.; Remor,Marcelo B.; Gotardo,Jackeline T.; Rosa,Pábolla M. Dalla. |
| ABSTRACT Geochemical background establishment is indispensable to determine the actual state of contamination of soils and sediments. However, no scientific consensus exists regarding the methodology for determining these values. In this context, this study aimed to establish the geochemical background in an Oxisol (Rhodic Hapludox) by means of an integrated method that uses direct and indirect soil analyses to identify the most appropriate calculation methodology. Soil samples were collected in a permanent preservation area of the Cascavel River watershed, PR, Brazil. The elements Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, and Zn present in soil samples were quantified by flame atomic absorption spectrometry. The use of a permanent preservation area is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trace elements; Heavy metals; Sediment; Soil. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300565 |
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| Justi,André L; Vilas Boas,Marcio A; Sampaio,Silvio C. |
| Analisar a qualidade da irrigação, além de avaliar seu bom funcionamento, é uma forma de verificar a viabilidade de sua implantação e operação. Como a uniformidade de distribuição é um dos parâmetros mais utilizados para essa avaliação, este trabalho objetivou utilizar técnicas de engenharia de qualidade, usando o índice de capacidade do processo (Cpl) para avaliar a uniformidade de distribuição de água em um sistema de irrigação por aspersão convencional. Os ensaios foram conduzidos no Núcleo Experimental de Engenharia Agrícola, UNIOESTE, com dois aspersores modelo Super10, marca NAANDAN, espaçados 9 m entre si, durante 25 irrigações de 1 h cada. Os dados climáticos foram coletados a cada 10 min, por uma estação meteorológica sem fio. Encontraram-se um... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Controle de qualidade; Velocidade do vento; Uniformidade de distribuição. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162010000200008 |
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| Soncela,Rosimaldo; Sampaio,Silvio C.; Vilas Boas,Marcio A.; Tavares,Maria H. F.; Smanhotto,Adriana. |
| The determination of volumetric water content of soils is an important factor in irrigation management. Among the indirect methods for estimating, the time-domain reflectometry (TDR) technique has received a significant attention. Like any other technique, it has advantages and disadvantages, but its greatest disadvantage is the need of calibration and high cost of acquisition. The main goal of this study was to establish a calibration model for the TDR equipment, Trase System Model 6050X1, to estimate the volumetric water content in a Distroferric Red Latosol. The calibration was carried out in a laboratory with disturbed soil samples under study, packed in PVC columns of a volume of 0.0078m³. The TDR probes were handcrafted with three rods and 0.20m... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apparent dielectric constant; Time-domain reflectometry; Soil water content. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000500004 |
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| Registros recuperados: 46 | |
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