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Previous issue date: 2017-06-16 / O crescimento das atividades industriais vem proporcionando um aumento na gera??o de efluentes, que fez com que ?rg?os governamentais relacionados ao meio ambiente propusessem a cria??o de marcos regulat?rios para limitar a gera??o de efluentes. Os efluentes gerados pelas ind?strias t?xteis s?o de dif?cil degrada??o por m?todos tradicionais de tratamento. Os processos oxidativos avan?ados (POAs) s?o uma alternativa eficiente para a degrada??o de poluentes org?nicos, como corantes (azul de metileno). Neste trabalho, part?culas de cloreto de prata (AgCl) impregnadas com ?xido de cobre (CuO) foram sintetizadas via m?todo sonoqu?mico. Foram preparadas composi??es molares de 1:1 e 2:1 de AgCl/CuO, respectivamente. Tais composi??es passaram por tr?s rotas de obten??o distintas. Para a caracteriza??o das part?culas, utilizou-se as t?cnicas de difra??o de raios-X (DRX), microscopia eletr?nica de varredura com emiss?o de campo (MEV-FEG), e espectroscopia UV-vis?vel (UV-vis). Para verificar a aplicabilidade do composto foram realizados nas amostras de AgCl/CuO testes fotocatal?ticos para degrada??o do corante azul de metileno e a atividade antimicrobiana frente ?s bact?rias Escherichia coli e Staphylococcus aureus. Os resultados da difra??o de raios-X confirmaram a forma??o de AgCl e CuO em todas as amostras, n?o havendo ind?cios de dopagem para nenhuma rota utilizada. Os resultados da atividade fotocatal?tica indicam que o aumento da propor??o molar de AgCl (1:1 para 2:1) acelera a degrada??o do azul de metileno em m?dia em 25%. / The growth of industrial activities has led to an increase in the generation of effluents, which led environmental agencies to propose the creation of regulatory frameworks to limit the generation of effluents. The effluents generated by the textile industries are difficult to be degraded by traditional methods of treatment. Advanced oxidative processes (POAs) are an efficient alternative for the degradation of organic pollutants such as dyes (methylene blue). In this work, silver chloride particles (AgCl) impregnated with copper oxide (CuO) were synthesized via method sonochemistry. AgCl/CuO 1:1 and 2:1 molar compositions, respectively, were prepared. Such compositions went through three distinct procurement routes. To characterize the particles, X-ray diffraction (XRD), scanning electron microscopy with field emission (SEM-FEG), and UV-visible (UV-vis) spectroscopy were performed. To verify the applicability of the compound were carried out in the samples of AgCl/CuO photocatalytic tests for degradation of the methylene blue dye and the antimicrobial activity against the bacteria Escherichia coli and Staphylococcus aureus. The results of X-ray diffraction confirmed the formation of AgCl and CuO in all samples, with no evidence of doping for any route used. The results of the photocatalytic activity indicate that increasing the molar ratio of AgCl (1:1 to 2:1) accelerates the degradation of methylene blue on average by 25%.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/24820 |
| Date | 16 June 2017 |
| Creators | Andrade Neto, Nivaldo Freire de |
| Contributors | 24779953839, Delmonte, Mauricio Roberto Bomio, 27816279841, Matsui, Katia Nicolau, 26114671880, Barros, Braulio Silva, 00735018405, Motta, Fabiana Villela da |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM CI?NCIA E ENGENHARIA DE MATERIAIS, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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