Effect Of Heavy Metals On
Mostrando 25-36 de 80 artigos, teses e dissertações.
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25. Application of vinasse in soils: effect on soil charges and particle dispersion / AplicaÃÃo de vinhaÃa em solos: efeito no balanÃo de cargas e dispersÃo de partÃculas
The vinasse is the main byproduct of the ethanol and sugarcane brand production; these activities are in large expansion in Brazil. For a long time the vinasse was launched into water courses, generating negative environmental impacts. One of the alternatives for producers to get rid of vinasse is its addition in soils as fertilizer. Although the effects of
Publicado em: 2009
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26. Competitive biosorption of nickel and copper ions on alginae and algae Sargassum filipendula / Bioadsorção competitiva dos ions niquel e cobre em alginato e alga marinha Sargassum filipendula
Environmental biotechnology studies have been conducted using alternative materials in order to eliminate heavy metal ions from industrial effluents. Brown algae are an attractive materials, due to their large availability and their reduced participation in the vital functions of marine ecosystems. The main structural polysaccharide of the brown algae is alg
Publicado em: 2009
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27. CASCA DE ARROZ COMO ADSORVENTE PARA ÍONS DE METAIS PESADOS: Caracterização e modificação química / RICE HUSK AS ADSORBENTS FOR HEAVY METAL IONS: characterization and chemical modification
Adsorption of some metal ions (Co2+, Ni2+, Cu2+ e Zn2+) from aqueous solutions (pH 5.0) onto in nature rice husk (0.088 < <0.177 mm) was investigated. All experiments were conducted by the batch adsorption techniques at room temperature (28 1C) and under constant stirring. The adsorption amounts were determined using atomic absorption spectr
Publicado em: 2009
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28. Sewage sludge application in cane-plant as nitrogen and phosphorus source and its environmental effects / Aplicação de lodo de esgoto em cana-planta como fonte de nitrogênio e fósforo e seu impacto ambiental
The potential agricultural use of the sewage sludge is due to their organic matter and nutrients contents, mainly nitrogen and phosphorus, the most important constituint. However, there is a lack of research to adequate the nitrogen and phosphate fertilizer doses to be applied in agricultural fields treated with this residue. Despite the evident benefits of
Publicado em: 2009
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29. Ecophysiological aspects of Astyanax fasciatus and Pimelodus maculatus from Furnas dam (MG): morpho-functional evaluation of the gills and hematological variables / Aspectos fisioecológicos de Astyanax fasciatus e Pimelodus maculatus (teleósteos) do reservatório da UHE de Furnas, MG : avaliação morfofuncional das brânquias e variáveis hematológicas
The aim of this study was to evaluate the morphofunctional structure of the gills and the hematological variables of Astyanax fasciatus and Pimelodus maculatus living on Furnas Dam Reservoir (Minas Gerais State, Brazil) and analyses the influence of water quality on these parameters. The fishes were collected in five sites (FU10: Turvo; FU20: Guapé; FU30: B
Publicado em: 2008
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30. Efeito da aplicação de percolado de resíduo sólido urbano em solo cultivado com capim-tifton 85 / Effect from the application of the municipal refuse percolate on the soil cropped with Tifton-85 grass
The effects from the application of different percolate rates of municipal solid waste (RSU) on the chemical characteristics of the soil, productivity and mineral composition of the tifton- 85 grass (Cynodon spp) were evaluated. The experiment was conducted in the Experimental Area for Treatment of Residues pertaining to the Department of Agricultural Engine
Publicado em: 2008
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31. Use of ion-exchange resins in wastewater from electroplanting process. / Utilização de resinas de troca-iônica em efluentes de galvanoplastia.
The increasing industrialization carried out with the use of heavy metal in industrial processes over the last decades resulted in increasing environmental contamination, mainly in aquatic environments. Thus, as water is an extremely important natural resource for life, effluent treatment methods become essential for effluent generating companies. This work
Publicado em: 2008
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32. Avaliação da genotoxicidade das águas do lençol freático sob a Universidade Federal do Rio Grande do Norte
The groundwater represents the most important freshwater supply of planet. Dailly, in all world a great amount of toxic and genotoxic material reaches the aquatic systems, mainly the aquifers. The Barreiras aquifer through of five water wells is responsible for the supplying of Universidade Federal do Rio Grande do Norte (UFRN). All water wells are polluted
Publicado em: 2007
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33. Antioxidative responses of water hyacinth under cadmium stress / Resposta antioxidativa de aguapé sob estresse por cádmio
Plants of hyancinth were treated during 8 days in water containing 0,05 and 0,50 mM of CdCl2 under natural light in a glasshouse maintained at 25-32°C with a 16 h photoperiod. The effect of cadmium on oxidative enzymes and nitrogen metabolism was studied. After 8 days an alteration on SOD activity was observed when the pattern of bands was analyzed by e
Publicado em: 2007
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34. Response to different concentrations of cadmium on the Aspergillus sp CadG1 strain / Respostas enzimáticas da linhagem superior CadG1 de Aspergillus sp. à exposição ao cádmio
In the last decades there has been a great deal of concerning towards environmental pollution levels, due to the problems it has caused to the human health and also contributing to agricultural yield decreasing. Contamination of the environment with heavy metals is becoming a serious global problem, threatening seriously different ecosystems, particularly th
Publicado em: 2006
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35. Uso de lodo de esgoto na cana-de-açúcar como fonte de nitrogênio e fósforo: parâmetros de fertilidade do solo, nutrição da planta e rendimentos da cultura / Use of sewage sludge on soil planted with sugarcane as nitrogen and phosphorus source: soil fertility attributes, plant nutrition and yield
The use of sewage sludge on land can improve soil fertility considering nitrogen, phosphorus and organic matter inputs. The aim of these experiments was to evaluate the effect of sewage sludge on soil, sugarcane plants and sugarcane yield in substitution to nitrogen and phosphorus from mineral fertilizers. The effect of the sewage sludge as a source of nitro
Publicado em: 2006
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36. Efeito do cobre sobre fungos micorrÃzicos e trevo vermelho (Trifolium pratense L.)
The effects of copper on arbuscular mycorrhizal (AMF) and ectomycorrhizal fungi (EMF) and on the symbiosis between AMF and plants of Trifolium pratense L were evaluated. Species diversity, most probable number (MPN) of propagules and production of glomalin by AMF were estimated in a copper mining area (a- waste product area; b- interface between the waste pr
Publicado em: 2006