Engenharia de Materiais (UACSA)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2913
Siglas das Coleções:
APP - Artigo Publicado em Periódico
TAE - Trabalho Apresentado em Evento
TCC - Trabalho de Conclusão de Curso
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Resultados da Pesquisa
Item Síntese e caracterização de um material nanoestruturado magnético, para adsorção de resíduos de corantes em meio líquido(2022-10-06) Alencar, Ellen Oliveira de Assis; Araújo, Ana Cláudia Vaz de; http://lattes.cnpq.br/6861890992609511; http://lattes.cnpq.br/0326211164564344Pernambuco's agreste region has developed with the growth of the local textile industry, this growth has brought with it the pollution of some rivers in the region. One of the steps in the fabric manufacturing process is dyeing, which uses synthetic dyes with high stability and resistance to degradation. In the fabric washing process, excess dye is released from the fibers and generates contaminated effluents. As a result, many studies have been developed aiming at new efficient methodologies for the decontamination of these effluents. Adsorption has been widely used in the treatment of textile effluents with the use of magnetic nanomaterials that work as adsorbents for textile dyes and are easily removed from the medium, through the application of an external magnetic field. In this work, iron oxide magnetic nanoparticles (NPs) with average crystallite size between 30 and 35 nm were synthesized. These NPs were used as adsorbents for Reactive Black 5 (RB5) dye residues in aqueous medium. The decolorization and removal efficiencies of RB5 by the NPs were around 100% and 40%, respectively. The adsorption kinetics was better adjusted to the Pseudo Second Order method with correlation coefficient R2 = 0,95. For the adsorption isotherms, the Langmuir and Freundlich models were satisfactorily adjusted to the results obtained.Item Aplicação de nanomateriais advindos de biomassa para tratamento de águas residuárias da indústria têxtil(2019-01-25) Nascimento, Rizia Keila do; Araújo, Ana Cláudia Vaz de; http://lattes.cnpq.br/6861890992609511; http://lattes.cnpq.br/8972131109377770The inadequate disposal of industrial effluents has caused serious problems of environmental contamination worldwide. In the textile pole of Pernambuco some cases of river pollution were reported due to the process of dyeing and washing of fabrics. In this work, the feasibility of the use of nanostructured carbonaceous materials (CN) in the adsorption of textile dyes is studied. To obtain the carbonaceous material sugarcane leaves were used, these were washed, dried, crushed and submitted to hydrothermal synthesis. The samples were characterized by X-ray diffractometry (XRD), infrared (IR) spectroscopy, thermogravimetric analysis (TGA) and porosimetric analysis. The synthesized materials were presented as finely divided dark powders. In adsorption analyzes of the indigo carmine and red congo dyes the nanomaterials showed to be promising adsorbents. It was possible to observe a favorable behavior in relation to the adsorption of the dyes in liquid medium. The Langmuir, Freundlich and Redlich- Peterson isotherm models were suitable for the studied materials. The kinetic adsorption analysis suggests a pseudo second order behavior. The adsorptive mechanism of the nanomaterials could be characterized as heterogeneous, with adsorbate / adsorbent interactions of a chemical nature, where adsorption in monolayers is carried out at low concentrations and in multilayers at high concentrations of dye.Item Avaliação das propriedades de rejeitos contido no efluente industrial de uma empresa cerâmica como alternativa para reaproveitamento na fabricação de louças sanitárias(2022-05-23) Silva, Robson de França; Nascimento, Renalle Cristina Alves de Medeiros; http://lattes.cnpq.br/6167163214175615; http://lattes.cnpq.br/5901815548984027Effluents are all wastes originating from production processes or human consumption. They present specific physical, chemical and biological characteristics and their properties vary according to the raw material, the management and the branch of activity. When effluents are contaminated by solid materials from the industrial sector, treatments are usually carried out to separate the liquid part from the solid, thus obtaining a cleaner industrial waste. In a sanitary ware factory, ceramic clay slip is the propellant material for making the pieces. Sometimes this slip arrives at the effluent treatment plant and is then properly disposed of into the environment. Based on the above, this work aims to determine the physical, chemical and mineralogical characteristics of the mass retained in the filtration operations of the production process of sanitary ware. For this, a sample of retained mass, called sludge, from the industrial process of a factory of sanitary ware, was characterized from the tests of particle size distribution, Foster swelling, Cation Exchange Capacity and Specific Area, X-ray fluorescence spectroscopy, deflocculation curve, loss on fire and the test bodies, characterized by colour, shrinkage burning and flexural modulus of rupture. The results showed that the sludge had a wide particle size distribution, in the range of 0.3μm to 53μm, Haloisite4H2O as argillomineral of the clay fraction, high purity and good mechanical strength, being possible to infer that the reuse of sludge in ceramic mass is an alternative to reduce costs, resulting in a more sustainable production.