Contamination Of Hg In Sediments
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. 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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2. 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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3. Biodisponibilidade de mercurio e outros metais-traço em sedimentos do Rio Cubatão, Sistema Estuarino de Santos-Cubatão (SP) / Bioavailability of mercury and other trace-metals in sediments of Cubatão River, Santos-Cubatão Estuarine System (SP)
Coastal-estuarine ecosystems from the south of São Paulo State are presently degraded specially in Cubatão municipality, in consequence of population concentration and, industrial and petrochemical complexes. These environmental impacts have begun in the 1950s after the construction of the largest Latin America petrochemical complex in the Cubatão city.
Publicado em: 2007
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4. Avaliação de impactos ambientais por estudo geoquímico na Bacia do Córrego Rico, Paracatu - MG
The present work has as objective to carry through water and sediments quality analyses of the Rico Stream and with this, recognize and quantify the main anthropical interventions in the area, mainly the deposition of domestic sewer without treatment and the clandestine gold washer activity. The study region is located near the Paracatu city, in the northwes
Publicado em: 2007
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5. 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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6. 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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7. Determinação de contaminação por coliformes termotolerantes, fósforo e metais traço (Cu, Pb e Hg) em água e sedimentos de galerias pluviais / Determination of contamination by thermotolerant coliform, phosphorus and trace metals (Cu, Pb and Hg) in water and sediments of rain galleries
Volumes consideráveis de esgoto doméstico e efluentes industriais, sem tratamento, são lançados nos oceanos causando a contaminação dos ecossistemas aquáticos e colocando em risco a saúde pública e ambiental. O presente estudo teve por objetivo investigar a presença de metais-traço, fosfato, coliformes termotolerantes e Escherichia coli em água e
Publicado em: 2006
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8. Evaluation of mercury contamination in sediments from Santos - São Vicente Estuarine System, São Paulo State, Brazil
A distribuição da contaminação por mercúrio no sistema estuarino de Santos - São Vicente foi observada pela análise de 31 amostras de sedimentos coletadas desse sistema, incluindo as áreas de manguezais localizadas em zonas sob influência urbana, industrial e portuária. Os valores obtidos de Hg variaram de 0,04 a 1,19 µg g -1, sendo que cerca de 9
Journal of the Brazilian Chemical Society. Publicado em: 2005-12
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9. Geochemistry of soil and sediments and anthropogenic impact by trace elements, in the microbasin of the stream of the farm Santa Cândida, urban area of Campinas, São Paulo State / Geoquimica de solos e sedimentos e impacto antropico por elementos-traço, na microbacia do corrego da Fazenda Santa Candida, area periurbana de Campinas (SP)
A caracterização ambiental da microbacia do córrego da fazenda Santa Cândida, manancial periurbano de Campinas (SP), foi realizada a partir da classificação de solos e geoquímica multi-elementar (Ag, AI, As, Sa, Se, Si, Ca, Cd, Ce, Co, Cr, Cs, Cu, Fe, Ga, Ge, Hf, Hg, In, K, La, Li, Mg, Mn, Mo, Na, Nb, Ni, P, Pb, Rb, Sb, Sn, Se, Sr, Ta, Te, Th, Ti, Ta,
Publicado em: 2005
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10. Geoquímica e índice de geoacumulação de mercúrio em sedimentos de superfície do estuário de Santos - Cubatão (SP)
The concentrations of mercury in surface sediments (<63mum fraction) from Santos-Cubatão Estuary, located in State of São Paulo, southeast Brazil, were determined to obtain the level of contamination in this highly polluted area. Fifteen stations distributed though seven rivers were sampled (156 samples collected) from September 1997 to August 1998 (12 sta
Química Nova. Publicado em: 2002-09
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11. Estudo da contaminação por mercurio e metais pesados em garimpo de ouro primario : o estudo de caso da região de Pilar de Goias e Guarinos, Goias
The main concepts of mercury water chemistry and the environmental contamination by this metal as a by product of mining of primary gold at "Pilar de Goiás" and "Guarinos" regions, state of Goias. Brazil, are here discussed. The heavy metals of lithogenie origin (Cd, Zn, Cu, As, Pb) liberated into the water by the extraction and processing of gold are also
Publicado em: 1990
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12. Heavy-Metal and Antibiotic Resistance in the Bacterial Flora of Sediments of New York Bight
The New York Bight extends seaward some 80 to 100 miles (ca. 129 to 161 km) from the Long Island and New Jersey shorelines to the edge of the continental shelf. Over 14 × 106 m3 of sewage sludge, dredge spoils, acid wastes, and cellar dirt are discharged into this area each year. Large populations of Bacillus sp. resistant to 20 μg of mercury per ml were o