Environmental Cleanup
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. Uptake of Hg2+ from aqueous solutions by microporous titano- and zircono-silicates
Being mercury one of the most toxic heavy metals present in the environment, it is of major concern to develop cleanup technologies to remove it from wastewater and recover mercury polluted ecosystems. In this context, we study the potential of some microporous titanosilicates and zirconosilicates for taking up Hg2+ from aqueous solutions. These materials ha
Química Nova. Publicado em: 2008
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14. PESTICIDES IN ORGANIC SOILS OF NOVA FRIBURGO RJ: APPLICATION OF THE ACHE INHIBITION ENZYMATIC METHODOLOGY AND STUDIES ON THE INFLUENCE OF SOIL FERTILITY PARAMETERS / PESTICIDAS EM SOLOS AGRÍCOLAS DE NOVA FRIBURGO, RJ: APLICAÇÃO DA METODOLOGIA ENZIMÁTICA DE INIBIÇÃO DA ACHE E ESTUDOS DA INFLUÊNCIA DOS PARÂMETROS DE FERTILIDADE DO SOLO
The objective of this study was to develop an analytical methodology for the determination of metomyl in soils through the inhibition of the enzime acetylcolinesterase (AChE), also regarding the influence of soil fertility parameters. The soil samples were collected from agricultural areas in the microbasin of São Lourenço stream, in Nova Friburgo district
Publicado em: 2008
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15. OtimizaÃÃo de metodologias de extraÃÃo e anÃlise de HPAs para determinaÃÃo da distribuiÃÃo ambiental e estimativa de fontes na cidade de Fortaleza / Optimization of methodologies for extraction and analysis of HPAs for determination of the ambient and estimative distribution of sources in the city of Fortaleza
Os hidrocarbonetos policÃclicos aromÃticos (HPAs) sÃo considerados poluentes orgÃnicos persistentes e apresentam propriedades mutagÃnica, carcinogÃnica e teratogÃnica, contudo existe uma grande carÃncia em dados da distribuiÃÃo de HPAs em centros urbanos e costeiros brasileiros. Assim o presente trabalho tem o intuito de gerar dados da situaÃÃo d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/11/2007
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16. Adsorption isotherm studies of Cd (II), Pb (II) and Zn (II) ions bioremediation from aqueous solution using unmodified and EDTA-modified maize cob
The need to clean-up heavy metal contaminated environment can not be over emphasized. This paper describes the adsorption isotherm studies of Cd (II), Pb (II) and Zn (II) ions from aqueous solution using unmodified and EDTA-modified maize cob. Maize cob was found to be an excellent adsorbent for the removal of these metal ions. The amount of metal ions adsor
Eclética Química. Publicado em: 2007
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17. Determination of organochlorine compounds and polycyclic aromatic hidrocarbons in Lagoa de Carapicuiba- SP / Determinação de compostos organoclorados e hidrocarbonetos poliaromáticos na Lagoa de Carapicuíba - SP
In 2002, started the workmanships of widening and deepening of the gutter of the river Tietê in the metropolitan area of Sao Paulo, as a tool to prevent the periodic floods that happen in this region. A large amount of sediment, rocks and garbage have been removed from the river and this same material has been deposited in the lagoa de Carapicuíba, which s
Publicado em: 2007
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18. Synthesis and characterization of nanostructured iron power for environmental remediation / Estudo do comportamento químico do ferro micro e nano particulado na despoluição de solos contaminados com metais pesados
The nanostructured iron has been of very interest because of their excellent chemistry properties and potential applications in areas as biomedical, catalysis and environmental engineering. One of expressive applications is its use as a catalyst for CVD synthesis of multi-walled carbon nanotubes and in remediation of contaminants from wastewater and soil. Th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/12/2006
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19. Synthesis and characterization of nanostructured iron power for environmental remediation / Estudo do comportamento químico do ferro micro e nano particulado na despoluição de solos contaminados com metais pesados
O poder do ferro nanoparticulado apresenta uma nova geração de tecnologia para remediação ambiental, que deverá promover soluções relevantes na limpeza de solos ou áreas contaminadas por despejos de indústrias galvânicas, fertilizantes, curtumes, mineração e outros passivos ambientais relacionados à poluição, com metais pesados perigosos. Os e
Publicado em: 2006
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20. Estudo do comportamento químico do ferro micro e nano particulado na despoluição de solos contaminados com metais pesados / Synthesis and characterization of nanostructured iron power for environmental remediation
O poder do ferro nanoparticulado apresenta uma nova geração de tecnologia para remediação ambiental, que deverá promover soluções relevantes na limpeza de solos ou áreas contaminadas por despejos de indústrias galvânicas, fertilizantes, curtumes, mineração e outros passivos ambientais relacionados à poluição, com metais pesados perigosos. Os e
Publicado em: 2006
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21. ESPECIAÇÃO DE COMPOSTOS BUTÍLICOS ESTANHO EM SEDIMENTOS SUPERFICIAIS DA BAÍA DE TODOS OS SANTOS / ESPECIATION OF ORGANOTIN COMPOUNDS IN SURFACE SEDIMENTS OF TODOS OS SANTOS BAY
The organotin compounds such as tributyltin (TBT) present in anti-fouling paints applied to ships, pleasure boats and vessels are proved to have harmful effects on the reproduction and the growth of several forms of marine life. In response to this environmental threat many countries introduced restriction to their use or even banishment. In Brazil there are
Publicado em: 2005
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22. Ocorrência de compostos organoclorados (pesticidas e PCBs) em mamíferos marinhos da costa de São Paulo (Brasil) e da Ilha Rei George (Antártica). / Occurrence of organochlorine compounds (pesticides and PCBs) in marine mammals from São Paulo coast (Brazil) and King George Island (Antarctica).
Organochlorine compounds cause strong impact on the nature, as a consequence of three basic characteristics: environmental persistence, bioaccumulation, and high toxicity. The marine mammals are one of the most vulnerable organisms to the chronic toxicity of these contaminants. Besides the high concentration in the body, the female transfers part of her load
Publicado em: 2002
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23. Plant genetic engineering may help with environmental cleanup.
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24. Rapid Isolation of a Single-Chain Antibody against the Cyanobacterial Toxin Microcystin-LR by Phage Display and Its Use in the Immunoaffinity Concentration of Microcystins from Water
A naïve (unimmunized) human semisynthetic phage display library was employed to isolate recombinant antibody fragments against the cyanobacterial hepatotoxin microcystin-LR. Selected antibody scFv genes were cloned into a soluble expression vector and expressed in Escherichia coli for characterization against purified microcystin-LR by competition enzyme-li
American Society for Microbiology.