Avaliação da potencialidade da humina na adsorção/dessorção dos trihalometanos
Ano de defesa: | 2010 |
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Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Sergipe
|
Programa de Pós-Graduação: |
Pós-Graduação em Química
|
Departamento: |
Não Informado pela instituição
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País: |
BR
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | https://ri.ufs.br/handle/riufs/6137 |
Resumo: | The use of chlorine and other compounds to treat water for human consumption has attracted the attention of the scientific community, due to reactions with natural organic matter (NOM) that could generate subproducts undesirable from the human health perspective. The trihalomethanes (THMs) are frequently found in water treatment systems, with chloroform (CHCl3), dichlorobromomethane (CHBrCl2), dibromochloromethane (CHBr2Cl) and bromoform (CHBr3) being the most common. Alternative adsorbents for removal of these compounds are sought, that are economically viable, easily disposed of and readily regenerated without losing their properties. The objective of the present work was to assess the performance of batch and fixed bed column systems, using humin in natura and immobilized on sodium silicate, respectively, for adsorption of the principal THMs found in water supply systems, as well as to determine the regeneration capacity of humin following thermal desorption. Kinetically, adsorption of THMs by humin followed a pseudo-second order reaction, with more than 50 % removal in the first 5 minutes for all compounds studied, and equilibrium described by the Freundlich model reached in 240 minutes. The THM adsorption results were significant at p < 0.05 for both batch (74.6 83.2 % removal) and column (99.7 % removal in optimized tests) experiments, and were significantly (p < 0.05) influenced by flow rate and bed height. The potential of humin for removal of the THMs was confirmed in thermal desorption tests, when increases in adsorption capacity (significant at p < 0.05) of 18.88 % (CHBr3), 18.09 % (CHBr2Cl), 24.16 % (CHBrCl2), 20.15 % (CHCl3) and 24.16 % (total trihalomethanes) were observed 17 between the first and fifth uses of the same adsorbent bed. The results demonstrate the potential of humin for removal of THMs. |
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Cunha, Graziele da Costahttp://lattes.cnpq.br/3881897681788109Romão, Luciane Pimenta Cruzhttp://lattes.cnpq.br/29777645002817852017-09-27T13:57:59Z2017-09-27T13:57:59Z2010-03-30CUNHA, Graziele da Costa. ASSESSMENT OF POTENTIAL IN HUMIN ADSORPTION / DESORPTION OF TRIHALOMETHANES. 2010. 120 f. Dissertação (Mestrado em Química) - Universidade Federal de Sergipe, São Cristóvão, 2010.https://ri.ufs.br/handle/riufs/6137The use of chlorine and other compounds to treat water for human consumption has attracted the attention of the scientific community, due to reactions with natural organic matter (NOM) that could generate subproducts undesirable from the human health perspective. The trihalomethanes (THMs) are frequently found in water treatment systems, with chloroform (CHCl3), dichlorobromomethane (CHBrCl2), dibromochloromethane (CHBr2Cl) and bromoform (CHBr3) being the most common. Alternative adsorbents for removal of these compounds are sought, that are economically viable, easily disposed of and readily regenerated without losing their properties. The objective of the present work was to assess the performance of batch and fixed bed column systems, using humin in natura and immobilized on sodium silicate, respectively, for adsorption of the principal THMs found in water supply systems, as well as to determine the regeneration capacity of humin following thermal desorption. Kinetically, adsorption of THMs by humin followed a pseudo-second order reaction, with more than 50 % removal in the first 5 minutes for all compounds studied, and equilibrium described by the Freundlich model reached in 240 minutes. The THM adsorption results were significant at p < 0.05 for both batch (74.6 83.2 % removal) and column (99.7 % removal in optimized tests) experiments, and were significantly (p < 0.05) influenced by flow rate and bed height. The potential of humin for removal of the THMs was confirmed in thermal desorption tests, when increases in adsorption capacity (significant at p < 0.05) of 18.88 % (CHBr3), 18.09 % (CHBr2Cl), 24.16 % (CHBrCl2), 20.15 % (CHCl3) and 24.16 % (total trihalomethanes) were observed 17 between the first and fifth uses of the same adsorbent bed. The results demonstrate the potential of humin for removal of THMs.A utilização de cloro e outros compostos nas Estações de Tratamento de Água para consumo humano têm atraído a atenção da comunidade científica devido as suas reações com a matéria orgânica natural (MON) as quais podem gerar subprodutos indesejáveis na perspectiva da saúde humana. Os trihalometanos são frequentemente encontrados nos sistemas de tratamento de água, sendo os mais comuns o clorofórmio (CHCl3), diclorobromometano (CHBrCl2), dibromoclorometano (CHBr2Cl) e bromofórmio (CHBr3). Adsorventes alternativos são pesquisados para remoção desses compostos, os quais sejam economicamente viáveis, de fácil disposição e que possam ser facilmente regenerados sem perda das suas propriedades. Assim, o objetivo do presente trabalho foi avaliar a performance da adsorção em batelada e em coluna de leito fixo usando humina in natura e imobilizada em sílica de sódio, respectivamente, na adsorção dos principais trihalometanos (THM) encontrados no sistema de abastecimento de água, bem como avaliar a capacidade de regeneração da mesma após a dessorção térmica. Cineticamente, a adsorção dos THM por humina pode ser descrita pelo modelo de pseudo segunda ordem, com capacidade de remoção de mais de 50% nos primeiros cinco minutos para todos os compostos em estudo. O modelo da isoterma de Freundlich foi o que melhor se ajustou com tempo de equilíbrio de 240 min. Os resultados da adsorção dos THM foram significativos p<0,05 para os ensaios em batelada (74,6-82,2% de remoção) e em coluna (99,7% de remoção para os testes otimizados), sendo influenciado significativamente pelo fluxo e altura do leito adsorvente. Os ensaios de dessorção térmica 15 comprovaram o potencial da humina na remoção dos THM, devido ao aumento significativo p<0,05 de 18,88, 18,09, 24,16, 20,15 e 24,16% para o CHBr3, CHBr2Cl, CHBrCl2, CHCl3 e trihalometanos totais respectivamente, na capacidade de adsorção da humina entre primeiro e o quinto ciclo de reuso do leito. O trabalho demonstra o potencial da humina na remoção de THM.Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorapplication/pdfporUniversidade Federal de SergipePós-Graduação em QuímicaUFSBRTrihalometanosHuminaAdsorçãoTratamento de águaTrihalomethanesHuminBiosorptionWater treatmentCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICAAvaliação da potencialidade da humina na adsorção/dessorção dos trihalometanosASSESSMENT OF POTENTIAL IN HUMIN ADSORPTION / DESORPTION OF TRIHALOMETHANESinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSinstname:Universidade Federal de Sergipe (UFS)instacron:UFSORIGINALGRAZIELE_COSTA_CUNHA.pdfapplication/pdf1859606https://ri.ufs.br/jspui/bitstream/riufs/6137/1/GRAZIELE_COSTA_CUNHA.pdf624242fab2ed668fb109cb32eafbff0eMD51TEXTGRAZIELE_COSTA_CUNHA.pdf.txtGRAZIELE_COSTA_CUNHA.pdf.txtExtracted texttext/plain156021https://ri.ufs.br/jspui/bitstream/riufs/6137/2/GRAZIELE_COSTA_CUNHA.pdf.txtce702336c6501522f386b0a41d41a97dMD52THUMBNAILGRAZIELE_COSTA_CUNHA.pdf.jpgGRAZIELE_COSTA_CUNHA.pdf.jpgGenerated Thumbnailimage/jpeg1279https://ri.ufs.br/jspui/bitstream/riufs/6137/3/GRAZIELE_COSTA_CUNHA.pdf.jpgb9818e89ecf0564fefb345965e8a60adMD53riufs/61372018-01-16 19:31:27.249oai:ufs.br:riufs/6137Repositório InstitucionalPUBhttps://ri.ufs.br/oai/requestrepositorio@academico.ufs.bropendoar:2018-01-16T22:31:27Repositório Institucional da UFS - Universidade Federal de Sergipe (UFS)false |
dc.title.por.fl_str_mv |
Avaliação da potencialidade da humina na adsorção/dessorção dos trihalometanos |
dc.title.alternative.eng.fl_str_mv |
ASSESSMENT OF POTENTIAL IN HUMIN ADSORPTION / DESORPTION OF TRIHALOMETHANES |
title |
Avaliação da potencialidade da humina na adsorção/dessorção dos trihalometanos |
spellingShingle |
Avaliação da potencialidade da humina na adsorção/dessorção dos trihalometanos Cunha, Graziele da Costa Trihalometanos Humina Adsorção Tratamento de água Trihalomethanes Humin Biosorption Water treatment CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Avaliação da potencialidade da humina na adsorção/dessorção dos trihalometanos |
title_full |
Avaliação da potencialidade da humina na adsorção/dessorção dos trihalometanos |
title_fullStr |
Avaliação da potencialidade da humina na adsorção/dessorção dos trihalometanos |
title_full_unstemmed |
Avaliação da potencialidade da humina na adsorção/dessorção dos trihalometanos |
title_sort |
Avaliação da potencialidade da humina na adsorção/dessorção dos trihalometanos |
author |
Cunha, Graziele da Costa |
author_facet |
Cunha, Graziele da Costa |
author_role |
author |
dc.contributor.author.fl_str_mv |
Cunha, Graziele da Costa |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/3881897681788109 |
dc.contributor.advisor1.fl_str_mv |
Romão, Luciane Pimenta Cruz |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/2977764500281785 |
contributor_str_mv |
Romão, Luciane Pimenta Cruz |
dc.subject.por.fl_str_mv |
Trihalometanos Humina Adsorção Tratamento de água |
topic |
Trihalometanos Humina Adsorção Tratamento de água Trihalomethanes Humin Biosorption Water treatment CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.eng.fl_str_mv |
Trihalomethanes Humin Biosorption Water treatment |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
The use of chlorine and other compounds to treat water for human consumption has attracted the attention of the scientific community, due to reactions with natural organic matter (NOM) that could generate subproducts undesirable from the human health perspective. The trihalomethanes (THMs) are frequently found in water treatment systems, with chloroform (CHCl3), dichlorobromomethane (CHBrCl2), dibromochloromethane (CHBr2Cl) and bromoform (CHBr3) being the most common. Alternative adsorbents for removal of these compounds are sought, that are economically viable, easily disposed of and readily regenerated without losing their properties. The objective of the present work was to assess the performance of batch and fixed bed column systems, using humin in natura and immobilized on sodium silicate, respectively, for adsorption of the principal THMs found in water supply systems, as well as to determine the regeneration capacity of humin following thermal desorption. Kinetically, adsorption of THMs by humin followed a pseudo-second order reaction, with more than 50 % removal in the first 5 minutes for all compounds studied, and equilibrium described by the Freundlich model reached in 240 minutes. The THM adsorption results were significant at p < 0.05 for both batch (74.6 83.2 % removal) and column (99.7 % removal in optimized tests) experiments, and were significantly (p < 0.05) influenced by flow rate and bed height. The potential of humin for removal of the THMs was confirmed in thermal desorption tests, when increases in adsorption capacity (significant at p < 0.05) of 18.88 % (CHBr3), 18.09 % (CHBr2Cl), 24.16 % (CHBrCl2), 20.15 % (CHCl3) and 24.16 % (total trihalomethanes) were observed 17 between the first and fifth uses of the same adsorbent bed. The results demonstrate the potential of humin for removal of THMs. |
publishDate |
2010 |
dc.date.issued.fl_str_mv |
2010-03-30 |
dc.date.accessioned.fl_str_mv |
2017-09-27T13:57:59Z |
dc.date.available.fl_str_mv |
2017-09-27T13:57:59Z |
dc.type.status.fl_str_mv |
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 |
CUNHA, Graziele da Costa. ASSESSMENT OF POTENTIAL IN HUMIN ADSORPTION / DESORPTION OF TRIHALOMETHANES. 2010. 120 f. Dissertação (Mestrado em Química) - Universidade Federal de Sergipe, São Cristóvão, 2010. |
dc.identifier.uri.fl_str_mv |
https://ri.ufs.br/handle/riufs/6137 |
identifier_str_mv |
CUNHA, Graziele da Costa. ASSESSMENT OF POTENTIAL IN HUMIN ADSORPTION / DESORPTION OF TRIHALOMETHANES. 2010. 120 f. Dissertação (Mestrado em Química) - Universidade Federal de Sergipe, São Cristóvão, 2010. |
url |
https://ri.ufs.br/handle/riufs/6137 |
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Universidade Federal de Sergipe |
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