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Adsorção de herbicidas utilizando biochar obtido a partir de resíduos de madeira
(Universidade Federal de Santa Maria, 2022-02-26)
Residues of sawdust of the forest species Cedrela fissilis were modified, with a part of the
sample being only physically modified (BCC), while the other was also chemically activated
with zinc chloride (ZnCl2) as an ...
Extração assistida por ultrassom de β-glucanos de Lentinula edodes utilizando solvente eutético e água
(Universidade Federal de Santa Maria, 2022-03-30)
Shiitake is a mushroom rich in β-glucan type polysaccharides, long-chain molecules that have antioxidant properties that are beneficial to human health, in addition to having isolated physical properties of interest to the ...
Avaliação do uso de ultrassom para a conversão de ácido tânico visando à obtenção de ácido gálico
(Universidade Federal de Santa Maria, 2021-11-18)
Tannic acid is a macromolecule belonging to the hydrolysable tannins group, with multiple units of gallic acid linked to a central sugar. This compound is considered to have a low level of biodegradability and, under ...
Avaliação integrada do pré-tratamento do farelo de arroz desengordurado com solventes eutéticos e posterior hidrólise com água subcrítica
(Universidade Federal de Santa Maria, 2022-02-24)
In this dissertation, defatted rice bran was subjected to pre-treatments with deep
eutectic solvents aiming at delignification and enrichment in carbohydrate content. The
biomass was completely characterized. Four mixtures ...
Síntese de compósito de carbono a partir de resíduo de vitivinicultura para adsorção de contaminantes emergentes
(Universidade Federal de Santa Maria, 2022-02-25)
This work proposed the synthesis of a carbon composite (CC) chemically activated with ZnCl2. This CC was obtained from the pyrolysis of composted viticulture residue. The material was characterized by FT-IR (Fourier transform ...
Pirólise de resíduos plásticos visando à obtenção de produtos de alto valor agregado
(Universidade Federal de Santa Maria, 2016-08-31)
The increase in plastics consumption leads to increase the waste generation. Thus, the recycling of plastic materials has become increasingly important. The pyrolysis technique is one of the promising methods for recycling ...
Modificação de nanotubos de carbono por impregnação de nanopartículas metálicas via síntese verde para adsorção de glifosato
(Universidade Federal de Santa Maria, 2021-09-27)
In the present work, commercial multiwalled carbon nanotubes (MWCNTs) were modified
via green synthesis for impregnation of metallic nanoparticles (MPNs), evaluating the
influence of plant extracts (pomegranate leaves, ...
Avaliação catalítica de óxido de ferro suportado em zeólita mesoporosa em sistema foto-Fenton
(Universidade Federal de Santa Maria, 2016-03-08)
Due to the problems presented with the use of photo-Fenton homogeneous system, for the decomposition of recalcitrant organic compounds, several studies have been conducted in order to replace it with heterogeneous processes. ...
Otimização da produção e extração de metabólitos com atividade antioxidantes a partir do fungo Botryosphaeria dothidea isolado do bioma Pampa
(Universidade Federal de Santa Maria, 2017-08-17)
In this work the ultrasound was used to increase the production of metabolites with antioxidant activity obtained from the submerged fermentation of the fungus Botryosphaeria dothidea, followed by different extraction ...
Avaliação do fosfato de nióbio como catalisador heterogêneo na esterificação de ácido oleico com acetato de metila
(Universidade Federal de Santa Maria, 2017-09-29)
The concern about global warming and the search for energy security are main responsible for promote the development of renewable fuels. Among biofuels, biodiesel is a potential successor to fossil fuels because it is an ...