Doutorado em Química

URI Permanente para esta coleção

http://repositorio.ufes.br/handle/10/17501

Nível: início
Ano de início: 2014
Conceito atual na CAPES: 5
Ato normativo: Homologação da 85ª Reunião do CTC-ES, Parecer CNE/CES nº 163/2005.
Processo nº 23001.000081/2005-56 do Ministério da Educação.
Publicado no DOU 28/07/2005, seção 1, página 11)
Periodicidade de seleção: Anual
Área(s) de concentração: Química
Url do curso: https://quimica.vitoria.ufes.br/pt-br/pos-graduacao/PPGQ/detalhes-do-curso?id=956/a>

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Navegando Doutorado em Química por Autor "Almeida, Caroline Batistin da Cruz"

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    Metal-organic frameworks : da produção de tecidos funcionais ao Ensino de Química
    (Universidade Federal do Espírito Santo, 2024-08-30) Almeida, Caroline Batistin da Cruz; Moura, Paulo Rogério Garcez de ; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador2; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador3; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador4; ID do co-orientador4; Lattes do co-orientador4; Luz, Priscilla Paiva ; https://orcid.org/; http://lattes.cnpq.br/; Orientador2; https://orcid.org/; http://lattes.cnpq.br/; https://orcid.org/; http://lattes.cnpq.br/; Alves Junior, Severino; https://orcid.org/; http://lattes.cnpq.br/; Pimenta, Patrícia Figueiredo Santos ; https://orcid.org/; http://lattes.cnpq.br/; Tavares, Mari Inez ; https://orcid.org/; http://lattes.cnpq.br/; Dalmaschio, Cleocir José ; http://lattes.cnpq.br/; 5º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 6º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 7º membro da banca; https://orcid.org/; http://lattes.cnpq.br/
    Glyphosate (GLY) is an organophosphate pesticide widely used in agriculture as a non selective, broad-spectrum herbicide. It is the most widely sold pesticide in Brazil and worldwide and is considered potentially carcinogenic to humans according to the World Health Organization. Porous materials have been tested for the adsorption of this compound in aqueous media, with zirconium-based MOFs (ZrMOFs) being the materials with the best reported performance. This research evaluated the adsorption performance of GLY by ZrMOFs not yet investigated and produced cellulose composites functionalized with MOFs for the same application. The MOFs MOF-808, UiO-66 and UiO-66(NH2) were synthesized and characterized by XRD, TGA, DTA, N2 adsorption, DLS and pcz. Adsorption tests were performed in batch mode and PPO, PSO and Weber-Moris kinetic models were applied to the results. The adsorption equilibrium was investigated by the Langmuir and Freundlich models. MOF-808 synthesized in water reached the maximum GLY adsorption capacity of 277.0 mg g-1 and MOF-808 synthesized in DMF obtained 273.2 mg g-1, however, with better kinetic performance removing approximately 70% of GLY in solution in 10 minutes of contact and 99.5% in 5h. The PSO model best fitted the kinetic results indicating great availability of active sites for adsorption in the materials and the chemical nature of GLY adsorption in the material. The Langmuir model confirms this character indicating monolayer adsorption and the same interaction energy in the active sites. Cellulosic fibers functionalized with MOF-808 via in situ and ex situ methods were successfully obtained and showed good GLY adsorption performance, removing 99% of GLY in 3 hours of contact with a 0.1 mM solution of the herbicide. These fibers have potential applications for filters and personal protective clothing. Based on the theoretical framework involving the results obtained, a teaching plan on “MOFs for water decontamination” was developed, aimed at teaching Chemistry at the high school level. Problem-based experimental activities were applied to develop skills for the New High School Training Itinerary through the theme. It was observed that skills in the areas of scientific investigation, creative processes and sociocultural mediation were developed throughout the activities, and the theme proved to be an important strategy for teaching various objects of knowledge in the Chemistry curriculum, such as bonding theories, mixture separation techniques, acid-base theories, formulas, properties and reactions of organic compounds