Uso de processo Fenton modificado para a degradação de compostos orgânicos
Autor(a) principal: | |
---|---|
Data de Publicação: | 2013 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | LOCUS Repositório Institucional da UFV |
Texto Completo: | http://locus.ufv.br/handle/123456789/773 |
Resumo: | In environmental engineering, it was agreed to use the term organic microcontaminants for the full range of organic substances resistant to biological degradation, highlighting various industrial chemicals, surfactants, pesticides, steroids, hormones and hygiene, beauty and cleaning products. These pollutants, because they are not biodegradable and present high toxicity, may be responsible or contribute to affect the organisms in the water, alter the organoleptic water characteristics and damage human health. The conventional water treatment, generally, presents unsatisfactory performance in the removal of micropollutants. An alternative to mitigate these contaminants are the advanced oxidation processes, which are based on the Fenton reaction (conventional and modified). The objective of this study was to evaluate the efficiency of modified Fenton processes in the degradation of three different types of organic micropollutants: (i) humic substances (humic acid), (ii) phenol and (iii) drugs (trimethoprim and sulfamethoxazole). At first, it was aimed the evaluation of Mn4+ usage as catalyst supporting to the Fenton reaction, and also the Fe2+ replacement with Fe3+, in humic acid degradation. Verified that Mn4+ and Fe3+ did not contribute to improve the degradation efficiency, in a second experiment, degrading phenol, Fe 2+ was determined as a source of iron and Mn2+ was used as a catalyst supporting to the reaction. Previously, it was verified that Mn2+ presents different behavior in different pH (3 and 5), in a third experiment of drugs degradation it was used Fe2+ and Mn2+, confirming the interaction between Mn2+ and the pH. All experiments analyzed the influence of the factors pH, reagent concentration and reaction time. The inferences were conducted using variance analysis, Pareto chart, response surface method and desirability function. The significance level of the statistical analyzes was 5%. The optimal condition for the humic acid degradation predicted is: pH 5, [H2O2] 210 mg L-1, [Fe2+] 30 mg L-1 and reaction time of 120 min. The optimum conditions for the phenol degradation in more acidic pH (3) was: [H2O2] 210 mg L-1, [Fe2+] 20, 40 or 60 mg L-1, [Mn2+] 60 mg L-1 and reaction time of 90 min, in less acid pH (5) it was observed that the conventional Fenton process was a more efficient alternative, being the optimum condition: [H2O2] 90 mg L-1, [Fe2+] 20 mg L-1 and reaction time of 30 min. The optimum condition for the trimethoprim degradation was: pH 5, [H2O2] 180 mg L-1, [Fe2+] 45 mg L-1 and the reaction time of 30 min. This thesis concluded that the Mn4+ and Fe3+ do not show efficiency in the Fenton process, is possible to use Mn2+ when the substrate to be treated exhibit lower pH (3) and both, the Fenton modified and Fenton processes, presented high degradation efficiency. |
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Sarmento, Antover Panazzolohttp://lattes.cnpq.br/4025685702530313Matos, Antonio Teixeira dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783529H2Borges, Alisson Carrarohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706302U9Mounteer, Ann Honorhttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4723208Y4Bellato, Carlos Robertohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4727950A6Fonseca, Sandra Parreiras Pereirahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4758952P42015-03-26T12:31:32Z2014-05-152015-03-26T12:31:32Z2013-12-16SARMENTO, Antover Panazzolo. Usage of modified Fenton process in organic compounds degradation. 2013. 132 f. Tese (Doutorado em Construções rurais e ambiência; Energia na agricultura; Mecanização agrícola; Processamento de produ) - Universidade Federal de Viçosa, Viçosa, 2013.http://locus.ufv.br/handle/123456789/773In environmental engineering, it was agreed to use the term organic microcontaminants for the full range of organic substances resistant to biological degradation, highlighting various industrial chemicals, surfactants, pesticides, steroids, hormones and hygiene, beauty and cleaning products. These pollutants, because they are not biodegradable and present high toxicity, may be responsible or contribute to affect the organisms in the water, alter the organoleptic water characteristics and damage human health. The conventional water treatment, generally, presents unsatisfactory performance in the removal of micropollutants. An alternative to mitigate these contaminants are the advanced oxidation processes, which are based on the Fenton reaction (conventional and modified). The objective of this study was to evaluate the efficiency of modified Fenton processes in the degradation of three different types of organic micropollutants: (i) humic substances (humic acid), (ii) phenol and (iii) drugs (trimethoprim and sulfamethoxazole). At first, it was aimed the evaluation of Mn4+ usage as catalyst supporting to the Fenton reaction, and also the Fe2+ replacement with Fe3+, in humic acid degradation. Verified that Mn4+ and Fe3+ did not contribute to improve the degradation efficiency, in a second experiment, degrading phenol, Fe 2+ was determined as a source of iron and Mn2+ was used as a catalyst supporting to the reaction. Previously, it was verified that Mn2+ presents different behavior in different pH (3 and 5), in a third experiment of drugs degradation it was used Fe2+ and Mn2+, confirming the interaction between Mn2+ and the pH. All experiments analyzed the influence of the factors pH, reagent concentration and reaction time. The inferences were conducted using variance analysis, Pareto chart, response surface method and desirability function. The significance level of the statistical analyzes was 5%. The optimal condition for the humic acid degradation predicted is: pH 5, [H2O2] 210 mg L-1, [Fe2+] 30 mg L-1 and reaction time of 120 min. The optimum conditions for the phenol degradation in more acidic pH (3) was: [H2O2] 210 mg L-1, [Fe2+] 20, 40 or 60 mg L-1, [Mn2+] 60 mg L-1 and reaction time of 90 min, in less acid pH (5) it was observed that the conventional Fenton process was a more efficient alternative, being the optimum condition: [H2O2] 90 mg L-1, [Fe2+] 20 mg L-1 and reaction time of 30 min. The optimum condition for the trimethoprim degradation was: pH 5, [H2O2] 180 mg L-1, [Fe2+] 45 mg L-1 and the reaction time of 30 min. This thesis concluded that the Mn4+ and Fe3+ do not show efficiency in the Fenton process, is possible to use Mn2+ when the substrate to be treated exhibit lower pH (3) and both, the Fenton modified and Fenton processes, presented high degradation efficiency.Na engenharia de meio ambiente, convencionou-se usar o termo micropoluentes orgânicos para toda a gama de substâncias orgânicas resistentes à degradação biológica, destaque para diversos resíduos químicos industriais, surfactantes, defensivos agrícolas, esteroides, hormônios, produtos de higiene, beleza e limpeza. Tais poluentes, devido a sua não biodegradabilidade e, de modo geral, elevada toxicidade, podem ser responsáveis ou contribuem para afetar os organismos aquáticos, alterar as características organolépticas da água e prejudicar a saúde humana. Os sistemas convencionais de tratamento de águas apresentam, via de regra, desempenho insatisfatório na remoção de micropoluentes. Uma alternativa para a mitigação desses contaminantes são os processos oxidativos avançados, baseados na reação Fenton (convencional e modificado). Objetivou-se, neste estudo, avaliar a eficiência de processos do tipo Fenton modificado na degradação de três diferentes tipos de micropoluentes orgânicos: (i) substâncias húmicas (ácido húmico), (ii) fenol e (iii) fármacos (trimetoprima e sulfametoxazol). Num primeiro momento, objetivou-se avaliar a aplicabilidade de se utilizar o Mn4+ como catalisador coadjuvante na reação Fenton e, também, a substituição de Fe2+ por Fe3+, na degradação de ácido húmico. Verificado que o Mn4+ e o Fe3+ não contribuíram para a melhoria da eficiência de degradação, em um segundo experimento, ao se degradar fenol, determinou-se como fonte de ferro, o Fe2+, sendo utilizado como catalisador coadjuvante da reação o Mn2+. Considerando-se o comportamento diferenciado do Mn2+ em pHs diferentes (3 e 5), evidenciado em experimento anterior, num terceiro experimento de degradação de fármacos continuou-se a utilizar o Fe2+ e o Mn2+, tendo sido confirmada a interação positiva entre o Mn2+ e o pH. Em todos os experimentos analisou-se a influência dos fatores pH, concentração de reagentes e tempo de reação, sendo as inferências estabelecidas utilizando-se xanálise de variância, gráfico de Pareto, método de superfície de resposta e função de desejabilidade. O nível de significância das análises estatísticas foi de 5%. A condição ideal para a degradação de ácido húmico prevista é: pH 5, [H2O2] de 210 mg L-1, [Fe2+] de 30 mg L-1 e tempo de reação de 120 min. As condições ótimas para a degradação do fenol em pHs mais ácidos (3) foram: [H2O2] em 210 mg L-1, [Fe2+] em 20, 40 ou 60 mg L-1, [Mn2+] em 60 mg L-1 e o tempo de reação em 90 min; em pHs menos ácidos (5), observou-se que o processo Fenton convencional foi a alternativa mais eficiente, sendo a condição ótima: [H2O2] de 90 mg L-1, [Fe2+] de 20 mg L-1 e tempo de reação de 30 min. A condição ótima para a degradação da trimetoprima foi pH igual a 5, [H2O2] de 180 mg L-1, [Fe2+] de 45 mg L-1 e o tempo de reação de 30 min. Concluiu-se que, de modo geral, o Mn4+ e o Fe3+ não proporcionaram bom rendimento ao processo Fenton, que é possível utilizar o Mn2+, caso o substrato a ser tratado apresente baixo pH (3) e tanto o processo Fenton como o Fenton modificado proporcionam elevada eficiência na degradação de micropoluentes.Fundação de Amparo a Pesquisa do Estado de Minas Geraisapplication/pdfporUniversidade Federal de ViçosaDoutorado em Engenharia AgrícolaUFVBRConstruções rurais e ambiência; Energia na agricultura; Mecanização agrícola; Processamento de produCompostos orgânicosReação FantonProcessos oxidativos avançadosOrganic compoundsReaction FantonAdvanced oxidation processesCNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLAUso de processo Fenton modificado para a degradação de compostos orgânicosUsage of modified Fenton process in organic compounds degradationinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVORIGINALtexto completo.pdfapplication/pdf1917572https://locus.ufv.br//bitstream/123456789/773/1/texto%20completo.pdf19a2c5880b574133dbaa92dc83c3cef3MD51TEXTtexto completo.pdf.txttexto completo.pdf.txtExtracted texttext/plain245079https://locus.ufv.br//bitstream/123456789/773/2/texto%20completo.pdf.txt0d1537eb268c3f2f69392e3c049b6d09MD52THUMBNAILtexto completo.pdf.jpgtexto completo.pdf.jpgIM Thumbnailimage/jpeg3527https://locus.ufv.br//bitstream/123456789/773/3/texto%20completo.pdf.jpg0195ef9561b195d406d51446b4e8c064MD53123456789/7732016-04-06 23:14:53.477oai:locus.ufv.br:123456789/773Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452016-04-07T02:14:53LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false |
dc.title.por.fl_str_mv |
Uso de processo Fenton modificado para a degradação de compostos orgânicos |
dc.title.alternative.eng.fl_str_mv |
Usage of modified Fenton process in organic compounds degradation |
title |
Uso de processo Fenton modificado para a degradação de compostos orgânicos |
spellingShingle |
Uso de processo Fenton modificado para a degradação de compostos orgânicos Sarmento, Antover Panazzolo Compostos orgânicos Reação Fanton Processos oxidativos avançados Organic compounds Reaction Fanton Advanced oxidation processes CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA |
title_short |
Uso de processo Fenton modificado para a degradação de compostos orgânicos |
title_full |
Uso de processo Fenton modificado para a degradação de compostos orgânicos |
title_fullStr |
Uso de processo Fenton modificado para a degradação de compostos orgânicos |
title_full_unstemmed |
Uso de processo Fenton modificado para a degradação de compostos orgânicos |
title_sort |
Uso de processo Fenton modificado para a degradação de compostos orgânicos |
author |
Sarmento, Antover Panazzolo |
author_facet |
Sarmento, Antover Panazzolo |
author_role |
author |
dc.contributor.authorLattes.por.fl_str_mv |
http://lattes.cnpq.br/4025685702530313 |
dc.contributor.author.fl_str_mv |
Sarmento, Antover Panazzolo |
dc.contributor.advisor-co1.fl_str_mv |
Matos, Antonio Teixeira de |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783529H2 |
dc.contributor.advisor1.fl_str_mv |
Borges, Alisson Carraro |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706302U9 |
dc.contributor.referee1.fl_str_mv |
Mounteer, Ann Honor |
dc.contributor.referee1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4723208Y4 |
dc.contributor.referee2.fl_str_mv |
Bellato, Carlos Roberto |
dc.contributor.referee2Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4727950A6 |
dc.contributor.referee3.fl_str_mv |
Fonseca, Sandra Parreiras Pereira |
dc.contributor.referee3Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4758952P4 |
contributor_str_mv |
Matos, Antonio Teixeira de Borges, Alisson Carraro Mounteer, Ann Honor Bellato, Carlos Roberto Fonseca, Sandra Parreiras Pereira |
dc.subject.por.fl_str_mv |
Compostos orgânicos Reação Fanton Processos oxidativos avançados |
topic |
Compostos orgânicos Reação Fanton Processos oxidativos avançados Organic compounds Reaction Fanton Advanced oxidation processes CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA |
dc.subject.eng.fl_str_mv |
Organic compounds Reaction Fanton Advanced oxidation processes |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA |
description |
In environmental engineering, it was agreed to use the term organic microcontaminants for the full range of organic substances resistant to biological degradation, highlighting various industrial chemicals, surfactants, pesticides, steroids, hormones and hygiene, beauty and cleaning products. These pollutants, because they are not biodegradable and present high toxicity, may be responsible or contribute to affect the organisms in the water, alter the organoleptic water characteristics and damage human health. The conventional water treatment, generally, presents unsatisfactory performance in the removal of micropollutants. An alternative to mitigate these contaminants are the advanced oxidation processes, which are based on the Fenton reaction (conventional and modified). The objective of this study was to evaluate the efficiency of modified Fenton processes in the degradation of three different types of organic micropollutants: (i) humic substances (humic acid), (ii) phenol and (iii) drugs (trimethoprim and sulfamethoxazole). At first, it was aimed the evaluation of Mn4+ usage as catalyst supporting to the Fenton reaction, and also the Fe2+ replacement with Fe3+, in humic acid degradation. Verified that Mn4+ and Fe3+ did not contribute to improve the degradation efficiency, in a second experiment, degrading phenol, Fe 2+ was determined as a source of iron and Mn2+ was used as a catalyst supporting to the reaction. Previously, it was verified that Mn2+ presents different behavior in different pH (3 and 5), in a third experiment of drugs degradation it was used Fe2+ and Mn2+, confirming the interaction between Mn2+ and the pH. All experiments analyzed the influence of the factors pH, reagent concentration and reaction time. The inferences were conducted using variance analysis, Pareto chart, response surface method and desirability function. The significance level of the statistical analyzes was 5%. The optimal condition for the humic acid degradation predicted is: pH 5, [H2O2] 210 mg L-1, [Fe2+] 30 mg L-1 and reaction time of 120 min. The optimum conditions for the phenol degradation in more acidic pH (3) was: [H2O2] 210 mg L-1, [Fe2+] 20, 40 or 60 mg L-1, [Mn2+] 60 mg L-1 and reaction time of 90 min, in less acid pH (5) it was observed that the conventional Fenton process was a more efficient alternative, being the optimum condition: [H2O2] 90 mg L-1, [Fe2+] 20 mg L-1 and reaction time of 30 min. The optimum condition for the trimethoprim degradation was: pH 5, [H2O2] 180 mg L-1, [Fe2+] 45 mg L-1 and the reaction time of 30 min. This thesis concluded that the Mn4+ and Fe3+ do not show efficiency in the Fenton process, is possible to use Mn2+ when the substrate to be treated exhibit lower pH (3) and both, the Fenton modified and Fenton processes, presented high degradation efficiency. |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013-12-16 |
dc.date.available.fl_str_mv |
2014-05-15 2015-03-26T12:31:32Z |
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2015-03-26T12:31:32Z |
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info:eu-repo/semantics/publishedVersion |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
SARMENTO, Antover Panazzolo. Usage of modified Fenton process in organic compounds degradation. 2013. 132 f. Tese (Doutorado em Construções rurais e ambiência; Energia na agricultura; Mecanização agrícola; Processamento de produ) - Universidade Federal de Viçosa, Viçosa, 2013. |
dc.identifier.uri.fl_str_mv |
http://locus.ufv.br/handle/123456789/773 |
identifier_str_mv |
SARMENTO, Antover Panazzolo. Usage of modified Fenton process in organic compounds degradation. 2013. 132 f. Tese (Doutorado em Construções rurais e ambiência; Energia na agricultura; Mecanização agrícola; Processamento de produ) - Universidade Federal de Viçosa, Viçosa, 2013. |
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http://locus.ufv.br/handle/123456789/773 |
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por |
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Universidade Federal de Viçosa |
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Doutorado em Engenharia Agrícola |
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UFV |
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BR |
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Construções rurais e ambiência; Energia na agricultura; Mecanização agrícola; Processamento de produ |
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Universidade Federal de Viçosa |
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