Avaliação da remoção de Microcystis aeruginosa e microcistina-LR de águas eutrofizadas utilizando fotocatálise heterogênea
Ano de defesa: | 2010 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Estadual da Paraíba
|
Programa de Pós-Graduação: |
Mestrado em Ciência e Tecnologia Ambiental - MCTA
|
Departamento: |
Tecnologia Ambiental
|
País: |
BR
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://tede.bc.uepb.edu.br/tede/jspui/handle/tede/1660 |
Resumo: | The present work has the following objectives: to evaluate the process of heterogeneous photocatalysis using TiO2 and ultraviolet radiation for the removal of Microcystis aeruginosa and microcystin-LR from eutrophic waters; to study the effect of pH and time of exposure to UV radiation in removing colour, chlorophyll a and cyanobacteria in photocatalytic reactors of the cylindrical, parabolic type-PTR; evaluate the performance of a sand filter for the removal of total dissolved solids, COD, colour, cyanobacteria and cyanotoxins and evaluate the performance of a PTR reactor for the removal microcystin-LR using TiO2 and solar radiation. The research was performed at the Experimental Research Station for the Biological Treatment of Sewage EXTRABES Campina Grande, Paraiba Brazil. The water used was prepared by adding Microcystis aeruginosa cells. The photo-catalytic reactor typePTR was operated in two distinct experimental phases, in the first an artificial source of UV was used with a 24 factorial experimental design incorporating time and pH. Each factor had two levels: times of 2 and 4 hours and pHs of 6.0 and 9.0. Four experiments in triplicate were carried out. In the second phase solar radiation was used with a fixed time (2 hours) and pHs of 6,0 and 9.0. The water sample was initially passed through a sand filter and then to the photocatalytic reactor. The photoreactor functioned in batch mode with 2L of sample and the catalyst was TiO2 (0.5%). Quantative analyses were performed for cyanobacteria and cyanotoxins as well as physico-chemical analyses of the water for turbidity, colour, pH, alkalinity, chlorophyll a and COD. In phase 1 all the treatments were efficient but treatment T3 of 2h duration and pH 9.0 was the most efficient in terms of the removal of COD, chlorophyll a and Microcystis aeruginosa cells. The results from the second phase showed removal efficiencies for cyanobacteria of 89% and chlorophyll a of 73% when solar radiation was used for 2 hours. Heterogeneous photocatalysis shows good potential for the treatment of water containing cyanobacteria and cyanotoxins. However, it is essential to readjust the operational parameters, principally the time of exposure to solar and UV radiation for the removal of microcystin. It is important to carry out additional studies that better define the optimum conditions for heterogeneous photocatalysis for the elimination of cyanotoxins to values below those permitted in existing legislation. |
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Lopes, Wilton SilvaCPF:02064721452http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4766328U2Ceballos, Beatriz Suzana Ovruski deCPF:16025539472http://lattes.cnpq.br/9321950498637802Amorim, Ariuska Karla BarbosaCPF:82618593472http://lattes.cnpq.br/2034414130213796Vieira, Fernando FernandesCPF:25184016449http://lattes.cnpq.br/1129711375633007CPF:03419158408http://lattes.cnpq.br/3611184169861922Cabral, Simone Mendes2015-09-25T12:18:16Z2012-07-132010-04-23CABRAL, Simone Mendes. Assessment of removal of Microcystis aeruginosa and microcystin-LR in eutrophic waters using heterogeneous photocatalysis. 2010. 103 f. Dissertação (Mestrado em Tecnologia Ambiental) - Universidade Estadual da Paraíba, Campina Grande, 2010.http://tede.bc.uepb.edu.br/tede/jspui/handle/tede/1660The present work has the following objectives: to evaluate the process of heterogeneous photocatalysis using TiO2 and ultraviolet radiation for the removal of Microcystis aeruginosa and microcystin-LR from eutrophic waters; to study the effect of pH and time of exposure to UV radiation in removing colour, chlorophyll a and cyanobacteria in photocatalytic reactors of the cylindrical, parabolic type-PTR; evaluate the performance of a sand filter for the removal of total dissolved solids, COD, colour, cyanobacteria and cyanotoxins and evaluate the performance of a PTR reactor for the removal microcystin-LR using TiO2 and solar radiation. The research was performed at the Experimental Research Station for the Biological Treatment of Sewage EXTRABES Campina Grande, Paraiba Brazil. The water used was prepared by adding Microcystis aeruginosa cells. The photo-catalytic reactor typePTR was operated in two distinct experimental phases, in the first an artificial source of UV was used with a 24 factorial experimental design incorporating time and pH. Each factor had two levels: times of 2 and 4 hours and pHs of 6.0 and 9.0. Four experiments in triplicate were carried out. In the second phase solar radiation was used with a fixed time (2 hours) and pHs of 6,0 and 9.0. The water sample was initially passed through a sand filter and then to the photocatalytic reactor. The photoreactor functioned in batch mode with 2L of sample and the catalyst was TiO2 (0.5%). Quantative analyses were performed for cyanobacteria and cyanotoxins as well as physico-chemical analyses of the water for turbidity, colour, pH, alkalinity, chlorophyll a and COD. In phase 1 all the treatments were efficient but treatment T3 of 2h duration and pH 9.0 was the most efficient in terms of the removal of COD, chlorophyll a and Microcystis aeruginosa cells. The results from the second phase showed removal efficiencies for cyanobacteria of 89% and chlorophyll a of 73% when solar radiation was used for 2 hours. Heterogeneous photocatalysis shows good potential for the treatment of water containing cyanobacteria and cyanotoxins. However, it is essential to readjust the operational parameters, principally the time of exposure to solar and UV radiation for the removal of microcystin. It is important to carry out additional studies that better define the optimum conditions for heterogeneous photocatalysis for the elimination of cyanotoxins to values below those permitted in existing legislation.O presente trabalho teve como objetivos: avaliar o processo de fotocatálise heterogênea usando TiO e radiação UV na remoção de Microcystis aeruginosa e microcistina-LR de águas eutrofizadas; estudar o efeito do pH e tempo de exposição à intensidade de radiação UV na remoção de cor, clorofila a e cianobactérias em reator fotocatalítico do tipo cilíndrico parabólico - PTR; avaliar o desempenho de um filtro de areia na remoção de sólidos dissolvidos totais, DQO, cor verdadeira, cianobactérias e cianotoxinas e avaliar o desempenho de um reator do tipo cilíndrico parabólico PTR, na remoção de microcistina-LR utilizando TiO 2 e radiação solar. A pesquisa foi realizada na Estação Experimental de Tratamentos Biológicos de Esgotos Sanitários EXTRABES. A água utilizada foi preparada com adição de células de Microcystis aeruginosa. O sistema operado foi um reator focatalítico do tipo PTR e constou de duas etapas: na primeira utilizou-se radiação artificial UV no comprimento de onda até 256nm e na segunda radiação solar. Na etapa I realizouse um planejamento fatorial 2 2 2 , o qual apresenta como fatores, tempo e pH. Cada fator teve dois níveis: tempo de 2 e de 4h, e pH de 6,0 e de 9,0. Foram 4 experimentos realizados em triplicata. Na etapa II, utilizou-se radiação solar, o tempo foi fixo (2h) e o pH variou de 6 à 9. A amostra inicial passou por um filtro de areia e logo após, pelo reator fotocatalítico. O fotoreator funcionou em regime de batelada com 2L de amostra, e o catalisador foi TiO 2 (0,5%) Foram realizadas análises quantitativas de cianobactérias e cianotoxinas, além das análises física e químicas da água (turbidez, cor, pH, alcalinidade, clorofila a, DQO). Na etapa I todos os tratamentos se mostraram eficientes, mas T3, realizado com 2 horas e pH 9, foi o melhor, pela eficiência de remoção de DQO, clorofila a e células de Microcystis aeruginosa. Os resultados da segunda etapa (II) mostraram eficiência na remoção de cianobactérias (89%), clorofila a (73%) quando se utilizou radiação UV solar durante 2h. A fotocatálise heterogênea apresenta potencial elevado para o tratamento de água com cianobactérias e cianotoxinas. Entretanto é imprescindível o reajuste de parâmetros operacionais, principalmente o tempo de exposição à luz solar e à radiação UV para a remoção de microcistina. É importante a realizar novos estudos que permitam definir melhor o uso de fotocatálise heterogênea na eliminação de cianotoxinas e permitam atingir os valores inferiores ou iguais permitidos pela legislação vigente.Made available in DSpace on 2015-09-25T12:18:16Z (GMT). No. of bitstreams: 1 Simone Mendes Cabral_1.pdf: 1212169 bytes, checksum: 4b13476ba4cbeacbc1d80d0a24d23922 (MD5) Previous issue date: 2010-04-23Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorapplication/pdfhttp://tede.bc.uepb.edu.br/jspui/retrieve/3684/Simone%20Mendes%20Cabral_1.pdf.jpgporUniversidade Estadual da ParaíbaMestrado em Ciência e Tecnologia Ambiental - MCTAUEPBBRTecnologia AmbientalTratamento de ÁguaAbastecimento de ÁguaFotocatálise HeterogêneaEutrofizaçãoWater Treatment, Water Supply, Heterogeneous PhotocatalysisEutrophicationCNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::SANEAMENTO AMBIENTALAvaliação da remoção de Microcystis aeruginosa e microcistina-LR de águas eutrofizadas utilizando fotocatálise heterogêneaAssessment of removal of Microcystis aeruginosa and microcystin-LR in eutrophic waters using heterogeneous photocatalysisinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UEPBinstname:Universidade Estadual da Paraíba (UEPB)instacron:UEPBORIGINALSimone Mendes Cabral_1.pdfapplication/pdf1212169http://tede.bc.uepb.edu.br/jspui/bitstream/tede/1660/1/Simone+Mendes+Cabral_1.pdf4b13476ba4cbeacbc1d80d0a24d23922MD51THUMBNAILSimone Mendes Cabral_1.pdf.jpgSimone Mendes Cabral_1.pdf.jpgimage/jpeg3800http://tede.bc.uepb.edu.br/jspui/bitstream/tede/1660/2/Simone+Mendes+Cabral_1.pdf.jpg9991c292bb22c90a685ec3da4b71a008MD52tede/16602016-01-26 15:52:51.285oai:tede.bc.uepb.edu.br:tede/1660Biblioteca Digital de Teses e Dissertaçõeshttp://tede.bc.uepb.edu.br/jspui/PUBhttp://tede.bc.uepb.edu.br/oai/requestbc@uepb.edu.br||opendoar:2016-01-26T18:52:51Biblioteca Digital de Teses e Dissertações da UEPB - Universidade Estadual da Paraíba (UEPB)false |
dc.title.por.fl_str_mv |
Avaliação da remoção de Microcystis aeruginosa e microcistina-LR de águas eutrofizadas utilizando fotocatálise heterogênea |
dc.title.alternative.eng.fl_str_mv |
Assessment of removal of Microcystis aeruginosa and microcystin-LR in eutrophic waters using heterogeneous photocatalysis |
title |
Avaliação da remoção de Microcystis aeruginosa e microcistina-LR de águas eutrofizadas utilizando fotocatálise heterogênea |
spellingShingle |
Avaliação da remoção de Microcystis aeruginosa e microcistina-LR de águas eutrofizadas utilizando fotocatálise heterogênea Cabral, Simone Mendes Tratamento de Água Abastecimento de Água Fotocatálise Heterogênea Eutrofização Water Treatment, Water Supply, Heterogeneous Photocatalysis Eutrophication CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::SANEAMENTO AMBIENTAL |
title_short |
Avaliação da remoção de Microcystis aeruginosa e microcistina-LR de águas eutrofizadas utilizando fotocatálise heterogênea |
title_full |
Avaliação da remoção de Microcystis aeruginosa e microcistina-LR de águas eutrofizadas utilizando fotocatálise heterogênea |
title_fullStr |
Avaliação da remoção de Microcystis aeruginosa e microcistina-LR de águas eutrofizadas utilizando fotocatálise heterogênea |
title_full_unstemmed |
Avaliação da remoção de Microcystis aeruginosa e microcistina-LR de águas eutrofizadas utilizando fotocatálise heterogênea |
title_sort |
Avaliação da remoção de Microcystis aeruginosa e microcistina-LR de águas eutrofizadas utilizando fotocatálise heterogênea |
author |
Cabral, Simone Mendes |
author_facet |
Cabral, Simone Mendes |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Lopes, Wilton Silva |
dc.contributor.advisor1ID.fl_str_mv |
CPF:02064721452 |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4766328U2 |
dc.contributor.advisor-co1.fl_str_mv |
Ceballos, Beatriz Suzana Ovruski de |
dc.contributor.advisor-co1ID.fl_str_mv |
CPF:16025539472 |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/9321950498637802 |
dc.contributor.referee1.fl_str_mv |
Amorim, Ariuska Karla Barbosa |
dc.contributor.referee1ID.fl_str_mv |
CPF:82618593472 |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/2034414130213796 |
dc.contributor.referee2.fl_str_mv |
Vieira, Fernando Fernandes |
dc.contributor.referee2ID.fl_str_mv |
CPF:25184016449 |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/1129711375633007 |
dc.contributor.authorID.fl_str_mv |
CPF:03419158408 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/3611184169861922 |
dc.contributor.author.fl_str_mv |
Cabral, Simone Mendes |
contributor_str_mv |
Lopes, Wilton Silva Ceballos, Beatriz Suzana Ovruski de Amorim, Ariuska Karla Barbosa Vieira, Fernando Fernandes |
dc.subject.por.fl_str_mv |
Tratamento de Água Abastecimento de Água Fotocatálise Heterogênea Eutrofização |
topic |
Tratamento de Água Abastecimento de Água Fotocatálise Heterogênea Eutrofização Water Treatment, Water Supply, Heterogeneous Photocatalysis Eutrophication CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::SANEAMENTO AMBIENTAL |
dc.subject.eng.fl_str_mv |
Water Treatment, Water Supply, Heterogeneous Photocatalysis Eutrophication |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::SANEAMENTO AMBIENTAL |
description |
The present work has the following objectives: to evaluate the process of heterogeneous photocatalysis using TiO2 and ultraviolet radiation for the removal of Microcystis aeruginosa and microcystin-LR from eutrophic waters; to study the effect of pH and time of exposure to UV radiation in removing colour, chlorophyll a and cyanobacteria in photocatalytic reactors of the cylindrical, parabolic type-PTR; evaluate the performance of a sand filter for the removal of total dissolved solids, COD, colour, cyanobacteria and cyanotoxins and evaluate the performance of a PTR reactor for the removal microcystin-LR using TiO2 and solar radiation. The research was performed at the Experimental Research Station for the Biological Treatment of Sewage EXTRABES Campina Grande, Paraiba Brazil. The water used was prepared by adding Microcystis aeruginosa cells. The photo-catalytic reactor typePTR was operated in two distinct experimental phases, in the first an artificial source of UV was used with a 24 factorial experimental design incorporating time and pH. Each factor had two levels: times of 2 and 4 hours and pHs of 6.0 and 9.0. Four experiments in triplicate were carried out. In the second phase solar radiation was used with a fixed time (2 hours) and pHs of 6,0 and 9.0. The water sample was initially passed through a sand filter and then to the photocatalytic reactor. The photoreactor functioned in batch mode with 2L of sample and the catalyst was TiO2 (0.5%). Quantative analyses were performed for cyanobacteria and cyanotoxins as well as physico-chemical analyses of the water for turbidity, colour, pH, alkalinity, chlorophyll a and COD. In phase 1 all the treatments were efficient but treatment T3 of 2h duration and pH 9.0 was the most efficient in terms of the removal of COD, chlorophyll a and Microcystis aeruginosa cells. The results from the second phase showed removal efficiencies for cyanobacteria of 89% and chlorophyll a of 73% when solar radiation was used for 2 hours. Heterogeneous photocatalysis shows good potential for the treatment of water containing cyanobacteria and cyanotoxins. However, it is essential to readjust the operational parameters, principally the time of exposure to solar and UV radiation for the removal of microcystin. It is important to carry out additional studies that better define the optimum conditions for heterogeneous photocatalysis for the elimination of cyanotoxins to values below those permitted in existing legislation. |
publishDate |
2010 |
dc.date.issued.fl_str_mv |
2010-04-23 |
dc.date.available.fl_str_mv |
2012-07-13 |
dc.date.accessioned.fl_str_mv |
2015-09-25T12:18:16Z |
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info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
CABRAL, Simone Mendes. Assessment of removal of Microcystis aeruginosa and microcystin-LR in eutrophic waters using heterogeneous photocatalysis. 2010. 103 f. Dissertação (Mestrado em Tecnologia Ambiental) - Universidade Estadual da Paraíba, Campina Grande, 2010. |
dc.identifier.uri.fl_str_mv |
http://tede.bc.uepb.edu.br/tede/jspui/handle/tede/1660 |
identifier_str_mv |
CABRAL, Simone Mendes. Assessment of removal of Microcystis aeruginosa and microcystin-LR in eutrophic waters using heterogeneous photocatalysis. 2010. 103 f. Dissertação (Mestrado em Tecnologia Ambiental) - Universidade Estadual da Paraíba, Campina Grande, 2010. |
url |
http://tede.bc.uepb.edu.br/tede/jspui/handle/tede/1660 |
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por |
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por |
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Universidade Estadual da Paraíba |
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Mestrado em Ciência e Tecnologia Ambiental - MCTA |
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UEPB |
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Tecnologia Ambiental |
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Universidade Estadual da Paraíba |
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