Leaching Test
Mostrando 13-24 de 31 artigos, teses e dissertações.
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13. Perdas de nitrogênio por volatilização e lixiviação provenientes de fertilizantes granulados NK e NS / Nitrogen losses by volatilization and leaching from a granulated fertilizer NK and NS
In order to evaluate the volatilization of N-NH3 and leaching of N from granulated mixtures NK (urea and potassium chloride) and NS (urea and ammonium sulfate) in two soils, two experiments were conducted in a greenhouse with controlled temperature and humidity. The experiment followed a completely randomized design, in factorial 12 x 2 x 2 + control treatme
Publicado em: 2009
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14. Quality of coffee (Coffea arabica L.) pre-processed in coconut / Qualidade de café (Coffea arabica L.) pré-processado por via seca
The maturity stage physiological of coffee fruit after their harvest may influence on the physiological quality of grains and the final quality of coffee drink, mainly because of their peculiarities. The objective of this study was to verify some aspects of pre-process of coffee in coconut, harvesting at different percentages of cherry maturation stage, rela
Publicado em: 2009
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15. Perdas nitrogenadas e recuperação aparente de nitrogênio em fontes de adubação de capim elefante / Nitrogen losses and aparent recovery of nitrogen in sources of fertilization of elephant-gass
The efficiency of nitrogen fertilization is one of the key elements to grass production. The knowledge of nitrogen losses within this practice associated with the application of alternative nitrogen sources provide efficient use and flexibility in choosing between nitrogen fertilizers. The objective of this study was to evaluate nitrate leaching, ammonium vo
Publicado em: 2008
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16. Arquitetura de interfaces funcionais em argilas e adobes
Clay is a widely used and studied material in many scientific areas. It can be called mud and it also can be used in advanced applications such as the pharmaceutical industry composites, special adsorbents etc. Adobe is basically composed of clay and it retains some of its morphological characteristics and functions. It was possible in this work to develop s
Publicado em: 2008
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17. Sorption/desorption and leaching of the herbicide ametryne in soils cultivated with sugar cane and amended with sewage sludge / Sorção/dessorção e lixiviação do herbicida ametrina em solos canavieiros tratados com lodo de esgoto
Several studies have shown the benefits of applying sewage sludge on the physical and chemical properties of the soils. However, just a few of them evaluates the impact of this practice on the behavior of pesticides in tropical soils. The main goal of this research was to evaluate the effects of applying different sources of sewage sludge (Ribeirão Preto, F
Publicado em: 2007
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18. PREDIÇÃO DO POTENCIAL DE DRENAGEM ÁCIDA DE MINAS UTILIZANDO O MÉTODO CINÉTICO DA COLUNA DE LIXIVIAÇÃO / POTENTIAL PREDICTION OF ACID MINE DRAINAGE EMPLOYING LEACHING COLUMN KINETIC METHOD
The acid rock mine drainage (ARD) arising from sulfides oxidation in mining areas is a serious environmental problem that markedly affects the quality of the surrounding water. Choosing the measure for remediation and/or preventing pollution effect depends on a suitable evaluation through a prediction program, it has principally tests of the acid generation
Publicado em: 2007
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19. Modelagem de lixiviação do herbicida picloram atraves de lisimetro de drenagem sob vegetação de Brachiaria decumbens / Modeling of picloram herbicide leaching in a lysimeter under Brachiaria decumbens vegetation
Picloram is one of the most used herbicides in the control of weeds in pastures areas, especially the ones of difficult eradication. Many are the stories of wells and springs contamination with herbicides residues as a result of its leaching in grounds. Due to the lack of knowledge and available data on the destination of the picloram in brazilian grounds, r
Publicado em: 2007
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20. Variabilidade espacial de propriedades físicas e químicas de um neossolo flúvico cultivado com cenoura irrigada com água moderamente salina
An experiment has been performed aiming to evaluate the spatial-time variation patterns of soil humidity in an irrigated area in Pesqueira PE. The experiment has been carried out in an irrigated plot with carrot, with duration of 96 days. Two irrigated sectors (1 and 2) with 900 m2 each (30 m x 30 m) have been monitored in the experiment, using microsprinkle
Publicado em: 2007
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21. Influencia del fillers calcáreo en la solidificación/estabilización de metales pesados
Portland cement plays an ever more important role in the management of hazardous industrials wastes. Cement - based solidification/stabilization (S/S) technique has been effectively demonstrated as a treatment to isolate hazardous waste especially heavy metals. In the presents work will be discuss the effect that limestone filler addition to portland cement
Matéria (Rio J.). Publicado em: 2006
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22. Study of aplication of Layered Double Hydroxides in removal and slow release of pesticides / Estudo da aplicação de hidróxidos duplos lamelares na remoção e liberação lenta de pesticidas
The extensive use of pesticides in modern agriculture has been contributing to an increase in environmental contamination. Layered Double Hydroxides (LDHs), or anionic clays, bear a layered structure, and a variety of anions can be intercalated between these layers through electrostatic interactions. These layered materials can be used in adsorption/sorption
Publicado em: 2006
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23. Drying and storage of coffee: qualitative and sanitary aspects. / Secagem e armazenamento do cafÃ: aspectos qualitativos e sanitÃrios
The present work aimed to study both quality and sanity during drying and storage of the parchment, floater, cherry and mixture coffees submitted to the natural drying on grounds with three different sorts of floors and two distinct drying layers. The experimental design of the drying step, was made up of a completely randomized design with the treatments ar
Publicado em: 2006
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24. Effect of soybean oil in the endosulfan persistence in the environment. / Efeito de óleo de soja na persistência de endosulfan no ambiente.
The pesticides make part of a technology that is associated to the agriculture modernization. With their generalized use many problems occur and are diagnosed, among others, the water and soil contamination. The persistence in the environment is related to their physical and chemical properties, as well to the environment that defined the transport, retentio
Publicado em: 2005