Water Organic Geochemistry
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Estudo geoquímico e microfaunístico da região circunjacente ao emissário submarino de esgoto das Cigarras, São Sebastião, SP / Geochemistry and microfaunistic study of the area around the submarine outfall of Cigarras, São Sebastião, SP
The influence of submarine outfall of domestic sewage on the benthic foraminifera and sediments quality at Cigarras, São Sebastião, SP, is evaluated in this dissertation. Twenty water and bottom sediment samples were collected around the outfall in September 2006 (ten samples) and 2007 (ten samples). Another two samples were collected in the São Sebastiã
Publicado em: 2010
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2. Origin and composition of particulate organic matter in the estuarine-lagoon complex Mundaú-Manguaba using lipids as molecular markers / Origem e composição da matéria orgânica particulada no complexo estuarino-lagunar de Mundaú-Manguaba utilizando lipídios como marcadores moleculares
The Mundaú-Manguaba estuarine lagoon system is located in Maceió, Alagoas, Brazil. This region has been suffering an accelerated process of environmental degradation through many antropic activities like urban growth, sugar-cane processing, cattle breeding, industrials waste and sewage. The aim of this work is to evaluate the suspended particulate matter c
Publicado em: 2010
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3. Sazonalidade geoquimica em aguas intersticiais, superficiais e sedimentos estuarianos de Cubatão (SP), impactados por atividades industriais / Seasonal geochemistry in interstitial and overlying water and estuarine sediments from Cubatão (SP), impacted by industrial activities
Este trabalho apresenta concentrações sazonais de elementos maiores, menores e traço em testemunhos de sedimentos e águas intersticiais (água de poro) e de superfície do estuário do rio Morrão, situado na porção NE do sistema estuarino de Santos-Cubatão (Estado de São Paulo). Matéria orgânica na fase sólida e algumas espécies químicas como C
Publicado em: 2009
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4. Estudo geoquímico da bacia do ama e avaliação da qualidade de água
The quality of water in a drainage basin reflects the natural processes of a water catchment and the changes of environmental conditions reflect on physical and chemical water chemistry. The present work was realized in two drainages on Gama Catchment, Gama brook and Cedro stream, whose waters discharge into Paranoá Lake (Brasília, Federal District). The a
Publicado em: 2008
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5. Análise estratigráfica de alta resolução do intervalo praguiano-neoemsiano (Formação Ponta Grossa), na borda leste da Bacia do Paraná, com base em dados geoquímicos e sedimentológicos / High resolution stratigraphic analysis of praguian-neoemsian interval (Ponta Grossa Formation), at eastern edge of Parana Basin, with base on geochemical and sedimentologic datas
This work is the result of detailed stratigraphic analysis on the sedimentary record of Praguian?Emsian later interval, established on core samples of four wells in the Paleozoic outcrop section, eastern edge of Paran? Basin. Data set was obtained by means of sedimentology, gamma spectrometry and organic geochemistry (total organic carbon and pirolysis Rock-
Publicado em: 2007
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6. Avaliação de impactos ambientais nos tributários do lago Paranoá, Brasília - DF
The high level of urbanization in Distrito Federal in Brazil is contributing to modify the environment particularly the quality of surface water resources. The historical of environment aggression to the Paranoá Lake through urban expansion, land use and land occupation, is studied as environmental changes. In this work, physical-chemistry conditions and ge
Publicado em: 2007
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7. ESTERÓIS COMO MARCADORES MOLECULARES DA CONTAMINAÇÃO FECAL NO SISTEMA ESTUARINO IGUAÇU-SARAPUÍ, NOROESTE DA BAÍA DE GUANABARA (RJ) / STEROLS AS MOLECULAR MARKERS OF FECAL POLLUTION IN IGUAÇU-SARAPUÍ ESTUARINE SYSTEM, GUANABARA BAY NORTHEAST (RJ)
The contamination by domestic sewage of the Iguaçu River and Sarapuí channel, located in the north-western sector of Guanabara Bay, was investigated by the determination of sterols and elemental composition (C and N) of organic matter in suspended matter and superficial sediments. Physico-chemical and chemical characterization of water and sediments were c
Publicado em: 2006
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8. Oceanographical Geoquinica of sedimentary carbonates of the continental platform of the state of the Cearà and implications / Geoquimica de carbonatos sedimentares da plataforma continental do estado do Cearà e implicaÃÃes oceanogrÃficas
Eight foraminÃfera-rich sediment samples of the continental margin of Brazil, between the states of Cearà and Pernambuco and single foraminifera specimens (Amphistegina radiata, Peneropolis planatus and Globigenrinoides rubbe) of fifty sediment samples collected in the continental margin of the Ceara State were analysed for C and O- isotope. The objective
Publicado em: 2004
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9. Estudo geoquimicos com evidencias paleoambientais, maturação e biodegradação dos oleos de diferentes origens da Bacia Potiguar, Brasil : sintese de biomarcadores de esterois / Paleoenvironment, maturation and biodegradation studies of oils collected from differents souces in the Potiguar Basin, Brazil : and biomarkers synthesis from sterols
In this work, will be presented the results of the organic geochemistry study oils of the samples with oils, and two lacustrine freshwater (LAD) and two mixed (M), both of fields near the terrestian cost, and two marine evaporitic oils (ME) of fields located approximately 55 km from the litoral coast. All samples collected from over Estreito-Guamare, Potigua
Publicado em: 2003
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10. Surface geochemistry of the clay minerals
Clay minerals are layer type aluminosilicates that figure in terrestrial biogeochemical cycles, in the buffering capacity of the oceans, and in the containment of toxic waste materials. They are also used as lubricants in petroleum extraction and as industrial catalysts for the synthesis of many organic compounds. These applications derive fundamentally
The National Academy of Sciences.
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11. Microbial Biomass and Utilization of Dissolved Organic Matter in the Okefenokee Swamp Ecosystem †
The Okefenokee Swamp exhibited levels of microbial biomass and aerobic glucose uptake comparable to those of other organically rich, detritus-based aquatic ecosystems. In contrast to other peat-accumulating systems, this acidic (pH 3.7), low-nutrient environment does not show diminished water column or surface sediment microbial biomass or heterotrophic acti