Physical Chemistry Parameters
Mostrando 1-12 de 33 artigos, teses e dissertações.
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1. Diesel-Like Biofuels Production Using Fatty Waste
According to the waste-to-energy (WTE) valorization and circular economy principles, the use of waste oil and grease (WOG) for obtaining biofuels shows the tendency towards sustainability, makes the interest in green chemistry, and the development of environmentally friendly processes grow. Three different fatty wastes (from the fat trap of a sewage station,
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Determinação de parâmetros cinéticos em fluxo com câmara de gradiente e deteção espectrofotométrica: aplicação à reação entre o violeta de cristal e o ião hidróxido
A didactic experiment is proposed aimed to extend the Flow Injection Analysis (FIA) based methodology to the area of physical chemistry/chemical reactors for undergraduate labs. Our prime objective was to describe the use of a gradient chamber for determination of the rate constant for the reaction between crystal violet and the hydroxide ion. The study was
Quím. Nova. Publicado em: 2013
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3. Efeitos dos parâmetros da extração e avaliação da qualidade física e química dos óleos de baru e amendoim / Effects of parameter extraction and quality assessment ofphysics and chemistry of baru and peanut oil
This work aimed to optimize the extraction of baru oil (Dipteryx alata Vog.) by continuous mechanical pressing and assess its quality compared to peanut oil extracted under the same conditions, since both have similar characteristics. The characterization of fruit and baru almonds from southern state of Goiás was carried out, determining their chemical comp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2012
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4. Characterization of produced water in the oil industry for disposal and optimization of oil water separation. / Caracterização de água produzida na indústria de petróleo para fins de descarte e otimização do processo de separação óleo/água
The oil industry has several segments that can impact the environment. Among these, produced water which has been highlight in the environmental problem because of the great volume generated and its toxic composition. Those waters are the major source of waste in the oil industry. The composition of the produced water is strongly dependent on the production
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/03/2011
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5. Study for use the wastes of the paper manufacture in the road construction / Estudo para a utilização de resíduo da fabricação de papel na construção rodoviária
The paper and pulp industry represent one of the most expressive industrial sector around the world, being of great importance to the world economy. In South America, because of the wide forest resources, Brazil and Chile are the largest pulp-producing. Brazil produces around 6 million tons of pulp per year, among which 98% of the pulp are produced by the bl
Publicado em: 2010
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6. Valoración del desempeño de un dispositivo de autoalimentación diseñado para la evaluación operativa de electrodos revestidos
The objective of the present work is to evaluate the effectiveness of a self-feed device for covered electrodes. This device is able of eliminate disturbances from manual operation or the use of automatic control systems during the study of covered electrode behavior. The conjugation of different methods like short-circuit time statistical analysis, metallog
Soldagem & Inspeção. Publicado em: 2009-03
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7. Avaliação da estabilidade oxidativa de biodiesel de óleo de girassol com antioxidantes
Biodiesel can contain unsaturated fatty acids, which are susceptible to oxidation, being able to change into polymerized compounds. In this work biodiesel was characterized according to physical-chemistry parameters and the antioxidant activity of butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT) and tert-butylhydroquinone (TBHQ) added to biofue
Química Nova. Publicado em: 2009
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8. Integration of microbiological treatment with immobilized cells and emerging (Advanced Oxidation Process) technologies for wastewater treatment generated in the textile industry. / Integração do tratamento microbiológico com células imobilizadas e tecnologias emergentes (Processos Oxidativos Avançados) para o tratamento de efluentes gerados na indústria têxtil.
The integration of different treatment processes in the degradation of textile wastewater was evaluated using precipitation technique, advanced oxidation processes (AOP) and aerobic biological treatment. AOPs (Ozone/UV and reagent of Fenton/UV) were evaluated in batch experiments according to a factorial planning L18 (Tagushi Method) in function of the flow
Publicado em: 2009
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9. Determinação da produtividade primária pelo fitoplancton em zona eufótica na Represa Samambaia, Goiânia-GO. / Determination of primary productivity by phytoplankton in the euphotic zone in the Samambaia Reservoir, Goiânia-GO.
This study evaluated and determined the productivity of phytoplankton in euphotic zone in Samambaia Reservoir at Goiânia city, GO. The work involved productivity and physical chemistry sampling and measures, in loco, of data related to primary production. It was evaluated 16 physical chemistry parameters where the ranges of variation were: (1) temperature f
Publicado em: 2009
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10. Vegetation and soil gradient in the restinga forest in Espirito Santo, Brazil / Gradiente vegetacional e pedológico em floresta de restinga no Espírito Santo, Brasil
The Restingas are ecosystems that occur in sandy soils deposited during the Quaternary. These are known to have a high diversity of vegetation, but few studies provide information on abiotic factors determining this diversity. This study aimed to: (i) assess the influence of the chemical aspects, physical soil and flooding in phytophysionomic determination,
Publicado em: 2009
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11. Fitossociologia e florística do componente arbóreo em toposseqüência na reserva biológica de Saltinho, Pernambuco.
The forests have these characteristics phytosociological and floristic alter due to the complexity of factors that environment, therefore, study of species-related relief and soils it is necessary for a greater understanding of these relationships. The present work aimed to analyze the structure phytosociological and floristic in the toposequence on a patch
Publicado em: 2009
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12. Application of electroflocculation technique for the tannery effluent treatment / AplicaÃÃo da tÃcnica de eletro-floculaÃÃo no tratamento de efluentes de curtume
In the present work has been studied the electro-flocculation efficiency on the reduction of organic and inorganic material concentrations such as Chemical Oxygen Demand (COD), turbidity, total solids and metal, mainly chromium, on an untreated tannery effluent using a pair of electrodes. For this purpose, a lab scale Electro-Flocculation (EF) reactor was co
Publicado em: 2008