Sediment Remediation
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Influência da adição de nitrato de cálcio e de PhoslockTM no abatimento dos fluxos de nutrientes e metais na interface sedimento-coluna de água em um sistema lacustre eutrofizado
Este projeto avaliou a capacidade de abatimento dos fluxos de metais e nutrientes na interface sedimento-coluna de água da represa de Ibirité (MG), comparando-se duas diferentes tecnologias de remediação de sistemas lacustres, a adição de PhoslockTM e de nitrato de cálcio. Os experimentos foram realizados in situ, com montagem de mesocosmos na citada
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2012
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2. Remediação de sedimentos eutróficos da Represa Ibirité (MG) pela adição de nitrato e Phoslock: experimentos em laboratório / Remediation of Eutrophic Sediments by the Addition of Nitrate and Phoslock: Laboratory experiments
Ibirité Reservoir (Ibirité/Sarzedo, MG) receives untreated effluents and raw sewage from the city of Ibirité and surroundings, which are the main cause of the eutrophication of this ecosystem. Past studies have shown that sediment is a significant internal source of nutrients (ammonium and orthophosphate ions) to the water column. Within this context, the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2010
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3. Transformações na matéria orgânica nos sedimentos e águas eutrofizados da Represa Ibirité (Ibirité-Sarzedo, MG) tratados com nitrato de cálcio em microcosmos
Due to the growing concern with the environment and the welfare of future generations the search for the restoration of degraded areas and the reestablishment of equilibrium between the anthropogenic and natural environments are nowadays highlighted. The Ibirité Reservoir (Ibirité-Sarzedo, MG) is an example of water body impacted by the disorganized urbani
Publicado em: 2010
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4. Avaliação ecotoxicológica da adição de nitrato em sedimentos eutrofizados da Represa Ibirité (Betim MG): experimentos em microcosmos
The objective of the present dissertation was to make a toxicity assessment of the application of calcium nitrate solution as a remediation procedure for sediments of a eutrophic aquatic ecosystem. The study was carried out using microcosms with superficial sediments and water from sediment-water interface of the Ibirité Reservoir located in the metropolita
Publicado em: 2009
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5. Distribuição e biodisponibilidade de crômio em solos contaminados por resíduos de couro
Samples of soil, water and sediment were collected and analyzed in order to evaluate chromium contamination due to deposition of tannery residues onto soils under different management regimes. The results showed that soils used for sugar cane cultivation were not adversely impacted. However, in the case of mango plantations, variable concentrations of chromi
Química Nova. Publicado em: 2009
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6. Sedimentologia, batimetria, qualidade da Ãgua e vulnerabilidade do Rio Capibaribe na cidade do Recife
The Recife s Fluvio-marine plane, given its complexity, can be considered an interesting region for the development of environmental studies. The currrent study was developed in the two 200 m wide Capibaribe river margins areas, just after it reaches the Recife Flavio-marine Plane and between the Varzea neigthbordhood and the Recife s downtown (UTM coordinat
Publicado em: 2003
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7. Microbiological and Geochemical Characterization of Fluvially Deposited Sulfidic Mine Tailings
The fluvial deposition of mine tailings generated from historic mining operations near Butte, Montana, has resulted in substantial surface and shallow groundwater contamination along Silver Bow Creek. Biogeochemical processes in the sediment and underlying hyporheic zone were studied in an attempt to characterize interactions consequential to heavy-metal con
American Society for Microbiology.
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8. Mineralization of polycyclic aromatic hydrocarbons by a bacterium isolated from sediment below an oil field.
Microbiological analyses of sediments chronically exposed to petrogenic hydrocarbons resulted in the isolation of a gram-positive, rod-shaped bacterium which mineralized naphthalene (59.5% of the original amount), phenanthrene (50.9%), fluoranthene (89.7%), pyrene (63.0%), 1-nitropyrene (12.3%), 3-methylcholanthrene (1.6%), and 6-nitrochrysene (2.0%) to carb
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9. Sulfate-Reducing Bacteria Methylate Mercury at Variable Rates in Pure Culture and in Marine Sediments
Differences in methylmercury (CH3Hg) production normalized to the sulfate reduction rate (SRR) in various species of sulfate-reducing bacteria (SRB) were quantified in pure cultures and in marine sediment slurries in order to determine if SRB strains which differ phylogenetically methylate mercury (Hg) at similar rates. Cultures representing five genera of t
American Society for Microbiology.
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10. Biodegradation of Methyl tert-Butyl Ether by a Bacterial Pure Culture
A bacterial strain, PM1, which is able to utilize methyl tert-butyl ether (MTBE) as its sole carbon and energy source, was isolated from a mixed microbial consortium in a compost biofilter capable of degrading MTBE. Initial linear rates of MTBE degradation by 2 × 106 cells ml−1 were 0.07, 1.17, and 3.56 μg ml−1 h−1 for initial concentrations of 5, 50
American Society for Microbiology.
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11. Physiological Diversity and Distributions of Heterotrophic Bacteria in Deep Cretaceous Sediments of the Atlantic Coastal Plain
A series of 23 intact core segments was obtained from two distinct deep subsurface geological formations, the Middendorf and the Cape Fear formations, underlying the southeastern coastal plain of South Carolina. The Middendorf formation in this region consists of permeable, saturated, sandy sediments; the Cape Fear formation consists mainly of less permeable