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Itens para a visualização no momento 41-50 of 174
Síntese e caracterização de biopolímeros funcionalizados com APTES (3–aminopropiltrietoxisilano) para a adsorção de corante amarelo crepúsculo
(Universidade Federal de Santa Maria, 2019-08-05)
The biopolymers chitin (CTN) and chitosan (CTS) were functionalized with APTES (3–aminopropyltriethoxysilane) in order to enhance its adsorption potential for sunset yellow dye (SYD). The functionalization was evaluated ...
Preparação de biochar a partir de matérias–primas alternativas e sua aplicação na adsorção de corantes
(Universidade Federal de Santa Maria, 2019-10-25)
Contamination of natural waters has been one of the great problems of modern society. The
textile and food sectors stands out especially due to the large amounts of effluents discharged
into the water bodies. Thus, ...
Metodologias não convencionais na extração de compostos bioativos de casca de bergamota
(Universidade Federal de Santa Maria, 2019-11-08)
Citrus fruits, produced in large quantities in Rio Grande do Sul, have been highlighted by the high
content of bioactive compounds they present. These components can be extracted from the residues
generated ...
Fermentação em estado sólido assistida por ultrassom para a produção de enzimas de degradação de parede celular
(Universidade Federal de Santa Maria, 2019-08-05)
The agro-industry waste is low cost, high availability and it can be transformed into products of important economic value. The biotransformation of these substrates into compounds with an aggregated value from the solid-state ...
Modelagem cinética da reação de conversão de etanol em butanol com catalisadores de mg/al derivados de hidrotalcitas
(Universidade Federal de Santa Maria, 2019-03-26)
Butanol has been suggested as possible substitute of gasoline or to be used as fuel additive. At the moment, its main production route is from fossil raw material, allowing renewable routes from bioetanol to be studies, ...
Aplicação de zeólita mesoporosa sintetizada utilizando quitina para a adsorção de corantes catiônicos
(Universidade Federal de Santa Maria, 2018-06-26)
Zeolites are microporous materials, in general, which hinder the diffusive transport of certain molecules. Thus, to increase the possibilities of applications of this material, some studies proposed an addition of mesoporosity ...
Recuperação de neodímio a partir de fontes secundárias utilizando ácidos orgânicos e CO2 supercrítico
(Universidade Federal de Santa Maria, 2019-11-28)
Technological innovation has brought with it a number of electro-electronic equipment, but its
disposal has been faster, making these wastes a concern, as to their destination and the supply
of raw materials. These ...
Análise da eficiência de extratos vegetais para aplicação como inibidores de corrosão
(Universidade Federal de Santa Maria, 2019-03-27)
Naturals inhibitors can be obtained through vegetable extracts or biomass sources, contributing to attenuate
the oxidative process, reducing the corrosion and being an alternative ecofriendly. Recent researches, ...
Solução numérica de modelos de transferência de massa difusivos em sistemas de adsorção
(Universidade Federal de Santa Maria, 2017-07-17)
The present work develops in detail the numerical solution of diffusion mass transfer models
in the adsorption process of cationic dyes. The diffusive models are developed based on the
mass transfer phenomena in a porous ...
Recuperação seletiva de índio a partir da técnica de extração em fase sólida utilizando nanofibras com DEHPA
(Universidade Federal de Santa Maria, 2019-02-21)
The main objective of this work was to develop a nanomaterial able to selectively extract and
recover indium (In) from obsolete cell phone LCD screens. For this, Nylon 6 nanofibers were
produced and modified with ...