Lead Contamination
Mostrando 25-36 de 133 artigos, teses e dissertações.
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25. Algae of economic importance that accumulate cadmium and lead: a review
Currently, algae and algae products are extensively applied in the pharmaceutical, cosmetic and food industries. Algae are the main organisms that take up and store heavy metals. Therefore, the use of compounds derived from algae by the pharmaceutical industry should be closely monitored for possible contamination. The pollution generated by heavy metals rel
Revista Brasileira de Farmacognosia. Publicado em: 05/06/2012
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26. Uso do bivalve límnico Anodontites tenebricosus (LEA, 1834) no biomonitoramento de metais do Rio Ribeira de Iguape
This study investigated the contamination of the Ribeira de Iguape River - RIR by Cd, Zn, Cr and Pb, using the bivalve Anodontites tenebricosus as a biomonitor. Metal concentrations in tissue samples were measured by HR-ICPMS. Bivalve tissues exhibited mean levels of 1.00 µg/g Cd; 152.89 µg/g Zn; 14.79 µg/g Cr and 4.40 µg/g Pb. Lead concentrations were c
Química Nova. Publicado em: 2012
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27. Fatores químicos e físicos que afetam a contaminação por chumbo e cobre em água potável: uma abordagem para o estudo de caso em química analítica
Lead and copper concentrations in drinking water increase considerably on going from municipality reservoirs to the households sampled in Ribeirão Preto (SP-Brazil). Flushing of only 3 liters of water reduced metal concentrations by more than 50%. Relatively small changes in water pH rapidly affected corrosion processes in lead pipes, while water hardness a
Quím. Nova. Publicado em: 2012
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28. Determinação de compostos carbonilados e carboxilados em derivados de petróleo
Although metals and nitrogen/sulfur compounds have been the main concern of the petroleum industry, issues concerning the harmful effects on catalysts poisoning and product contamination by other contaminants such as oxygen-containing compounds have been raised. Trace amounts of carbonyl and carboxyl compounds in petroleum products can lead to catalyst poiso
Quím. Nova. Publicado em: 2012
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29. Ishikawa, A. A. Development of analytical methodology for the investigation of methylenedioxy derivatives in samples of vitreous humor in fatal traffic accident. 2011. 67 f. Dissertation (Master) - Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, 2011. / Desenvolvimento de metodologia analítica para a investigação de metilenodioxi derivados em amostras de humor vítreo em vítimas fatais de acidentes de trânsito
The methylenedioxy derivatives are among synthetic drugs of illicit use most consumed in the occident, these are substances cause mental and motor disorders and has caused major threat to traffic safety, these effects affect the performance of drivers and may lead to traffic accidents. The vitreous humor is a biological matrix available in postmortem analysi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/10/2011
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30. Análise microbiológica comparativa da ação de diferentes agentes descontaminantes sobre superfícies de titânio / Microbiological comparison of different decontaminant agents on rough and smooth titanium surfaces: microbiological analysis
Actually, the titanium implants are a successful option of treatment in Dentistry. However, failures are possible to occur due to surface exposition to oral environment immediately or lately after its implantation. The titanium implants surfaces can be infected by bacteria and its products similarly to dental roots surfaces. The contaminants turn the inflamm
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/09/2011
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31. Avaliação da qualidade da água de chuva e de um sistema filtro-vala-trincheira de infiltração no tratamento do escoamento superficial direto predial em escala real em São Carlos SP / Evaluation of rainfall water quality and a filter-swaleinfiltration trenches system in the treatment of the building direct runoff in real scale in são carlos sp
Several studies cite the pollution of stormwater as equivalent and sometimes even superior to those found in the sewers. According to this premise and thinking about environmental issues, especially in the contamination of groundwater and the spread of waterborne diseases, the quality of rainwater has become an important focus of study. This work concerns th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/08/2011
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32. Fitoextração em solo contaminado com metais pesados / Phytoextraction of soil contaminated with heavy metals
The industrial and urban progress associated with increased production of consumer goods has resulted in the generation of waste, which, for a long time, was indiscriminately discarded in the environment, causing damage usually irreversible to recover. Two experiments were conducted in soils contaminated with heavy metals: the first aimed at the disposal of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/07/2011
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33. Ocorrência de arsênio, cádmio e chumbo em tecidos de aves, suínos, bovinos de corte e equinos no Brasil
Among the major inorganic contaminants present in animal products, cadmium, arsenic and lead stand out. The aim of this study was to investigate the presence of residues of cadmium, arsenic and lead in samples of liver, kidney and muscle of cattle, poultry, swine and horses. It was used 3046 samples from 20 Brazilian States. The samples were analyzed at the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/07/2011
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34. Chumbo na água de consumo de Ribeirão Preto (SP): fatores químicos, físicos e possíveis correlações com a contaminação de crianças / Lead in drinking water from Ribeirão Preto (SP): chemical and physical factors and possible correlations with children contamination
A intoxicação por chumbo tem conseqüências devastadoras para o ser humano, principalmente para crianças. Em Ribeirão Preto foram detectadas crianças com níveis de chumbo no dente tão elevados quanto de crianças com conhecida contaminação na cidade de Bauru (SP). Diante disso, este trabalho teve como objetivos investigar fatores físicos e químic
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/03/2011
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35. Vítimas da contaminação por chumbo e a luta Pelo direito: o caso do Município de Santo Amaro na Bahia
Dissertação apresentada junto ao curso de Mestrado Profissional em Planejamento Ambiental pela Universidade Católica do Salvador, com área de concentração em Planejamento Ambiental, tendo como linha de pesquisa Compreensão e atenuação de constrangimentos históricos, políticos, sócio-econômicos e geográficos no planejamento ambiental. Com base n
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/03/2011
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36. Teores de elementos tóxicos e micronutrientes em fertilizantes e corretivos comercializados no Nordeste do Brasil.
Heavy metals are chemical elements with a density greater than 6 g cm-3 and among these metals, there are toxic elements cadmium (Cd), lead (Pb) and chromium (Cr). In soil, the application of fertilizers and heavy metals can add as impurities constituents of these inputs, contributing to soil contamination. Several countries, including Brazil, regulate the c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/03/2011