Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solar
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Trabalho de conclusão de curso |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/handle/123456789/38714 |
Resumo: | The heterogeneous photocatalysis, one of the Advanced Oxidation Process (AOP), has been pointed out as an efficient way to degrade organic components present in industrial and domestic effluents. In face of the increasingly poor quality of water in the world and the high potential of Natal, in Rio Grande do Norte, for the application of that technology, that work studies the degradation of sucrose in an aqueous solution using the heterogeneous photocatalysis. Then, it tried to determine the quantity of sucrose degraded, the kinetics of the reaction and the influence of pH and initial concentration of substrate on the efficiency of the process. Therefore, it were realized reactions of heterogeneous photocatalysis using solar light, titanium oxide and solutions of sucrose with initial concentrations of 30% and 20% (w/w). The more concentrated solution was submitted to reactions at high pH (9,0), medium pH (6,5) and low pH (5,0), while the solution of 20% was submitted to reactions at pH equals to 6,5. The product analysis was made with a refractometer, which was also used to obtain an empiric equation that relates refractive index and concentration of sugar. It was observed that there was no degradation of sucrose when its initial concentration (C0) was 20%, either in the case of concentration equal to 30% in basic medium (pH = 9,0). However, when the pH was equal to 6,5 and 3,0 (C0 = 30%), the degradation was, respectively, equal to 2,35% and 4,45% in relation to the initial concentration. Therefore, lower concentrations of substrate may negatively affect the efficiency of heterogeneous photocatalysis, while lower pH’s may increase its efficiency. Because of the low values of degradation observed, it was not possible to establish the kinetics of the reaction. |
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Araújo, André Bilro Pereira deMedeiros, Válber Rodrigo Ribeiro deRodrigues, Matheus VeríssimoMoriyama, André Luis Lopes2018-07-05T20:10:58Z2021-09-27T12:19:26Z2018-07-05T20:10:58Z2021-09-27T12:19:26Z2018-06-212013007399ARAÚJO, André Bilro Pereira de. Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solar. 2018. 33f. Trabalho de Conclusão de Curso (Graduação em Engenharia Química) - Departamento de Engenharia Química, Universidade Federal do Rio Grande do Norte, Natal, 2018.https://repositorio.ufrn.br/handle/123456789/38714The heterogeneous photocatalysis, one of the Advanced Oxidation Process (AOP), has been pointed out as an efficient way to degrade organic components present in industrial and domestic effluents. In face of the increasingly poor quality of water in the world and the high potential of Natal, in Rio Grande do Norte, for the application of that technology, that work studies the degradation of sucrose in an aqueous solution using the heterogeneous photocatalysis. Then, it tried to determine the quantity of sucrose degraded, the kinetics of the reaction and the influence of pH and initial concentration of substrate on the efficiency of the process. Therefore, it were realized reactions of heterogeneous photocatalysis using solar light, titanium oxide and solutions of sucrose with initial concentrations of 30% and 20% (w/w). The more concentrated solution was submitted to reactions at high pH (9,0), medium pH (6,5) and low pH (5,0), while the solution of 20% was submitted to reactions at pH equals to 6,5. The product analysis was made with a refractometer, which was also used to obtain an empiric equation that relates refractive index and concentration of sugar. It was observed that there was no degradation of sucrose when its initial concentration (C0) was 20%, either in the case of concentration equal to 30% in basic medium (pH = 9,0). However, when the pH was equal to 6,5 and 3,0 (C0 = 30%), the degradation was, respectively, equal to 2,35% and 4,45% in relation to the initial concentration. Therefore, lower concentrations of substrate may negatively affect the efficiency of heterogeneous photocatalysis, while lower pH’s may increase its efficiency. Because of the low values of degradation observed, it was not possible to establish the kinetics of the reaction.A fotocatálise heterogênea, um dos Processos Oxidativos Avançados (POA), têm sido apontada como uma forma eficaz de degradar matéria orgânica em efluentes industriais e domésticos. Diante da qualidade cada vez pior das águas no mundo e do alto potencial da cidade de Natal, no Rio Grande do Norte, para aplicação dessa tecnologia, este trabalho propõe-se a estudar a degradação de sacarose em solução aquosa através da fotocatálise heterogênea. Para isso, buscou-se determinar a quantidade de açúcar degradado, estabelecer a cinética da reação e avaliar a influência do pH e da concentração inicial de substrato no processo. Dessa forma, foram realizadas reações fotocatalíticas heterogêneas com uso de luz solar e dióxido de titânio em concentrações iniciais de sacarose de 30% e 20% (m/m). A solução mais concentrada foi submetida a reações em meio básico (pH = 9,0), aproximadamente neutro (pH = 6,5) e ácido (pH = 5,0), enquanto a solução de 20% foi submetida à reação apenas no pH 6,5. A análise dos produtos foi realizada no refratômetro, o qual também foi usado para obter-se uma equação empírica que relaciona índice de refração com concentração de açúcar (% m/m). Observou-se que não houve degradação de açúcar quando a concentração inicial de substrato (C0) foi de 20% nem na C0 igual a 30% (meio básico). Porém, em meio aproximadamente neutro e ácido (C0 = 30%), a degradação de açúcar foi de respectivamente 2,35% e 4,45% em relação a concentração inicial. Portanto, concentrações mais baixas de substrato podem afetar negativamente o processo, enquanto que pH’s mais ácidos podem aumentar sua eficiência. Devido aos baixos valores de degradação obtidos, não foi possível estabelecer a cinética da reação.Universidade Federal do Rio Grande do NorteUFRNBrasilEngenharia QuímicaFotocatálise HeterogêneaHeterogeneous PhotocatalysisProcessos Oxidativos AvançadosAdvanced Oxidation ProcessesSacaroseSucroseDegradaçãoDegradationDióxido de titânioTitanium oxideEngenharias.Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solarinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/openAccessporreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNTEXTDegradacaodeSacarose_Araujo_2018.pdf.txtExtracted texttext/plain63073https://repositorio.ufrn.br/bitstream/123456789/38714/1/DegradacaodeSacarose_Araujo_2018.pdf.txt58dcba0c3bdfb89ebe65542c1236fafcMD51ORIGINALDegradacaodeSacarose_Araujo_2018.pdfMonografiaapplication/pdf1166583https://repositorio.ufrn.br/bitstream/123456789/38714/2/DegradacaodeSacarose_Araujo_2018.pdfa0abff817440d96073173f170e5153ffMD52LICENSElicense.txttext/plain756https://repositorio.ufrn.br/bitstream/123456789/38714/3/license.txta80a9cda2756d355b388cc443c3d8a43MD53123456789/387142021-09-27 09:19:27.017oai:https://repositorio.ufrn.br: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ório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2021-09-27T12:19:27Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.pr_BR.fl_str_mv |
Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solar |
title |
Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solar |
spellingShingle |
Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solar Araújo, André Bilro Pereira de Fotocatálise Heterogênea Heterogeneous Photocatalysis Processos Oxidativos Avançados Advanced Oxidation Processes Sacarose Sucrose Degradação Degradation Dióxido de titânio Titanium oxide Engenharias. |
title_short |
Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solar |
title_full |
Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solar |
title_fullStr |
Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solar |
title_full_unstemmed |
Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solar |
title_sort |
Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solar |
author |
Araújo, André Bilro Pereira de |
author_facet |
Araújo, André Bilro Pereira de |
author_role |
author |
dc.contributor.referees1.none.fl_str_mv |
Medeiros, Válber Rodrigo Ribeiro de |
dc.contributor.referees2.none.fl_str_mv |
Rodrigues, Matheus Veríssimo |
dc.contributor.author.fl_str_mv |
Araújo, André Bilro Pereira de |
dc.contributor.advisor1.fl_str_mv |
Moriyama, André Luis Lopes |
contributor_str_mv |
Moriyama, André Luis Lopes |
dc.subject.pr_BR.fl_str_mv |
Fotocatálise Heterogênea Heterogeneous Photocatalysis Processos Oxidativos Avançados Advanced Oxidation Processes Sacarose Sucrose Degradação Degradation Dióxido de titânio Titanium oxide |
topic |
Fotocatálise Heterogênea Heterogeneous Photocatalysis Processos Oxidativos Avançados Advanced Oxidation Processes Sacarose Sucrose Degradação Degradation Dióxido de titânio Titanium oxide Engenharias. |
dc.subject.cnpq.fl_str_mv |
Engenharias. |
description |
The heterogeneous photocatalysis, one of the Advanced Oxidation Process (AOP), has been pointed out as an efficient way to degrade organic components present in industrial and domestic effluents. In face of the increasingly poor quality of water in the world and the high potential of Natal, in Rio Grande do Norte, for the application of that technology, that work studies the degradation of sucrose in an aqueous solution using the heterogeneous photocatalysis. Then, it tried to determine the quantity of sucrose degraded, the kinetics of the reaction and the influence of pH and initial concentration of substrate on the efficiency of the process. Therefore, it were realized reactions of heterogeneous photocatalysis using solar light, titanium oxide and solutions of sucrose with initial concentrations of 30% and 20% (w/w). The more concentrated solution was submitted to reactions at high pH (9,0), medium pH (6,5) and low pH (5,0), while the solution of 20% was submitted to reactions at pH equals to 6,5. The product analysis was made with a refractometer, which was also used to obtain an empiric equation that relates refractive index and concentration of sugar. It was observed that there was no degradation of sucrose when its initial concentration (C0) was 20%, either in the case of concentration equal to 30% in basic medium (pH = 9,0). However, when the pH was equal to 6,5 and 3,0 (C0 = 30%), the degradation was, respectively, equal to 2,35% and 4,45% in relation to the initial concentration. Therefore, lower concentrations of substrate may negatively affect the efficiency of heterogeneous photocatalysis, while lower pH’s may increase its efficiency. Because of the low values of degradation observed, it was not possible to establish the kinetics of the reaction. |
publishDate |
2018 |
dc.date.accessioned.fl_str_mv |
2018-07-05T20:10:58Z 2021-09-27T12:19:26Z |
dc.date.available.fl_str_mv |
2018-07-05T20:10:58Z 2021-09-27T12:19:26Z |
dc.date.issued.fl_str_mv |
2018-06-21 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/bachelorThesis |
format |
bachelorThesis |
status_str |
publishedVersion |
dc.identifier.pr_BR.fl_str_mv |
2013007399 |
dc.identifier.citation.fl_str_mv |
ARAÚJO, André Bilro Pereira de. Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solar. 2018. 33f. Trabalho de Conclusão de Curso (Graduação em Engenharia Química) - Departamento de Engenharia Química, Universidade Federal do Rio Grande do Norte, Natal, 2018. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/handle/123456789/38714 |
identifier_str_mv |
2013007399 ARAÚJO, André Bilro Pereira de. Degradação de sacarose através de fotocatálise heterogênea com uso de radiação solar. 2018. 33f. Trabalho de Conclusão de Curso (Graduação em Engenharia Química) - Departamento de Engenharia Química, Universidade Federal do Rio Grande do Norte, Natal, 2018. |
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Brasil |
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Engenharia Química |
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Universidade Federal do Rio Grande do Norte |
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