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Comparação de técnicas para concentração de índio de telas de LCD e aplicação de eletro-obtenção
(Universidade Federal de Santa Maria, 2015-12-18)
Because of the constant introduction of new technologies to market growth of electronic waste generation has gained importance on the world stage, among these residues are cell phones. Deliver useful life increasingly ...
Utilização de CO2 supercrítico e ácidos orgânicos na lixiviação de índio presente em telas de lcd de telefones celulares
(Universidade Federal de Santa Maria, 2015-07-15)
The growth in the generation of electrical and electronic equipment waste (WEEE) has won global importance and cell phones are highlighted between these wastes because of short life cycle and its amounts of hazardous ...
Análise da viabilidade técnica e econômica da utilização de biogás em motores de ignição por compressão para geração de energia elétrica
(Universidade Federal de Santa Maria, 2019-05-21)
Growth in energy demand and security of energy supply have become a concern in recent decades. The high cost of fossil fuels and the need to reduce the emission of greenhouse gases have made renewable energy sources ...
Preparação do adsorvente magnético geopolímero/ferro metálico para remoção de contaminante orgânico em efluente aquoso
(Universidade Federal de Santa Maria, 2019-07-31)
In this work the synthesis of a magnetic geopolymer from silica, metakaolin, iron zero-valent, soybean oil, sodium hydroxide and hydrogen peroxide was proposed. The magnetic geopolymer was characterized by X-ray diffraction, ...
Efeitos do transbordamento da produtividade agrícola brasileira
(Universidade Federal de Santa Maria, 2019-03-26)
Agriculture is essential for the country's economic development. Brazil stands out in world agricultural production. All surplus produced is destined for exports. In this way, this research aimed to determine the agricultural ...
Pré-tratamento de casca de arroz utilizando líquido iônico [C16MIM][Br]
(Universidade Federal de Santa Maria, 2019-08-05)
Rice husk, an agricultural residue, is a cellulose rich material which present potential to produce second generation ethanol, however, due its recalcitrant structure related to the presence of lignin and silica, a ...
Métodos para correção das distorções da forma de onda secundária causadas pela saturação de transformadores de corrente para serviço de proteção
(Universidade Federal de Santa Maria, 2011-02-18)
This work aims to evaluate the performance of some methods used to detect and
correct the distorted portions of the secondary current signal waveform, which occur due to
the core saturation of current transformers. Such ...
Caracterização e tratamento de águas cinzas visando reúso doméstico
(Universidade Federal de Santa Maria, 2014-08-22)
The production and dissemination of knowledge on environmental issues, considering the social and economic aspects, including the reuse of water used for non-potable purposes meets the assumptions of sustainable planet. ...
Remoção de cianobactérias de águas por processo de flotação por ar dissolvido
(Universidade Federal de Santa Maria, 2016-03-03)
Human activities generate qualitative and quantitative impacts of water resources which vary in intensity with the occupation and urbanization of a watershed, create a big problem due to the high concentration of nutrients. ...
Implantação da logística reversa de lâmpadas fluorescentes no município de Não-Me-Toque/RS: estudo de caso
(Universidade Federal de Santa Maria, 2015-01-27)
This dissertation presents the analysis of reverse logistics fluorescent lamps in the city of Não-Me-Toque, located in the northwest of Rio Grande do Sul. With increased production and consumption of fluorescent lamps since ...