Sediments Quality Assessment
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Dredging impact on trace metal behavior in a polluted estuary: a discussion about sampling design
ABSTRACT Studies involving coastal sediment resuspension have shown that trace metals could be released to the water column due to changes in physical-chemical conditions. Therefore, if environmental agencies adopt screening protocols with insufficient evaluations of contaminant mobilization risks for a given area, the prediction of environmental impacts cau
Braz. j. oceanogr.. Publicado em: 22/07/2019
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2. Heavy metal concentrations and ecological risk assessment of the suspended sediments of a multi-contaminated Brazilian watershed
ABSTRACT. Metal concentrations in suspended sediments of one of the most polluted rivers in Brazil were measured. Concentrations of Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn were determined by inductively coupled plasma while Hg and As were analyzed with hydride generation flow injection atomic absorption spectroscopy. Contamination of As, Cd, Cr, Cu, Fe, Hg, Mn, N
Acta Sci., Agron.. Publicado em: 28/03/2019
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3. Diagnóstico ambiental das bacias hidrográficas que deságuam no trecho de Vazão Reduzida da Usina Hidrelétrica Amador Aguiar I, Uberlândia MG
The goal of this study is to make an environmental assessment of the hydrographic basin that disembogues into Trecho de Vazão Reduzida (TVR) of the electric plant of Amador Aguiar as a tool for environmental management. To achieve this goal, several studies such as watershed morphometry, flow monitoring, water quality, precipitation and finally, mapping the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2011
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4. Avaliação da qualidade do sedimento do baixo estuário do rio Itajaí-Açu (SC) através de testes de toxicidade crônica
After CONAMA resolution 344 of 2004, environmental agencies have required the quality assessment of the aquatic environments sediments that are subject to remobilization by dredging activities, mainly in port areas. By toxicity tests of embryo-larval development of sea urchin Arbacia lixula, this study analyzed the spatial-temporal quality variation of Itaja
Publicado em: 2009
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5. AvaliaÃÃo da qualidade do sedimento do estuÃrio do rio Cearà / Quality evaluation of the estuary sediment of the river Ceara
The evaluation of sediment quality has been seen as a consistent and necessary extension of assessment programmes for water resources. Sediments are the most concerning of the compartments due characteristics that favour the deposition and accumulation of contaminants. Previous studies showed that the estuary of Cearà River is suffering contamination by ind
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2008
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6. Comparação dos índices de qualidade da água e usos do fator contaminação e índice de geoacumulação para os sedimentos da microbacia do arroio João Corrêa, São Leopoldo, RS, Brasil
The João Corrêa creek, with 7 km length and a 9.7 km2 micro basin (MbaJC), has its main source into the forested hilly landscape of Sapucaia county and flows trough out the São Leopoldo city, receiving along his course several urban wastes and industrial effluents. Looking for a quantified evaluation of environmental impacts related to human activities, m
Publicado em: 2008
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7. AvaliaÃÃo da qualidade dos sedimentos e prognÃstico geoquÃmico ambiental da zona estuarina do rio Botafogo, Pernambuco
A contaminaÃÃo em metais pesados (MP) no estuÃrio do rio Botafogo, Estado de Pernambuco, Nordeste do Brasil, Ã avaliada a partir de sedimentos de fundo e testemunhos de sondagens. DeterminaÃÃes geocronolÃgicas 210Pb permitiram estudar a evoluÃÃo do nÃvel de contaminaÃÃo sobre um intervalo de aproximadamente 150 anos. MercÃrio e arsÃnio sÃo enf
Publicado em: 2008
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8. Efeitos da dragagem sobre a qualidade de sedimentos contaminados do canal do porto de Santos : biodisponibilidade e toxicidade de metais e compostos orgânicos persistentes / Effects of dredging on the quality of contaminated Sediments from the channel of the port of santos: Bioavailability and toxicity of metals and persistent Organic compounds
Contaminated sediments is a worldwide problem, and mobilization of contaminants is one of the most critical issue in environmental risk assessment when dredging projects are concerned. Considering this, we decided to investigate if and how toxic metals and persistent organic compounds such as PAH and PCB are mobilized during dredging operations in the Port o
Publicado em: 2007
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9. Agrarian soil and sediment redistribution and quality in slopes with riparian forests: a case study for Goiatuba, Brazil / Redistribuição e qualidade de solos e sedimentos agrícolas em vertentes com mata ciliar: estudo de caso em Goiatuba (GO), Brasil
Soil erosion is associated with environmental degradation because of inadequate use of natural resources in modern agriculture, thus promoting in and off-site impacts, represented by soil, water and nutrient losses, silting and contamination of riparian ecosystems. In the Brazilian Cerrado region these impacts become more evident by its fast conversion to ag
Publicado em: 2007
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10. Variabilidade espacial e sazonal da concentração de elementos-traço em sedimentos do sistema estuarino de Santos-Cubatão (SP)
Multi-element analyses of sediment samples from the Santos-Cubatão Estuarine System were carried out to investigate the spatial and seasonal variability of trace-element concentrations. The study area contains a rich mangrove ecosystem that is a habitat for tens of thousands of resident and migratory birds, some of them endangered globally. Enrichments of m
Química Nova. Publicado em: 2006-04
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11. Avaliação da qualidade da água na bacia hidrográfica do Ribeira de Iguape com vistas ao abastecimento público / RIBEIRA DO IGUAPE BASIN WATER QUALITY ASSESSMENT FOR DRINKING WATER SUPPLY
Ribeira do Iguape Basin, located in the Southeast region of São Paulo state, is the largest remaining area of Mata Atlântica which biodiversity as rich as Amazon forest , where the readiness of water versus demand is extremely positive. With sparse population density and economy almost dependent on banana agriculture, the region is still well preserved. To
Publicado em: 2006
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12. Aspectos limnológicos e sanitários de uma lagoa costeira no litoral leste do Ceará - lagoa do Batoque / Limnological and sanitary aspects of a coastal lagoon in the eastern coast of Ceará lagoa do Batoque
The water quality of Batoque lagoon, a coastal lagoon located along the eastern shoreline of the state of Ceará, Brazil, was characterized by means of monthly samplings from May to November 2005 to obtain dry-season (May-Jun) and wet-season (Aug-Nov) data. Additionally, two nycthemeral (24hr.) samplings were performed in July and December to observe daily v
Publicado em: 2006