Biossorção de tório e urânio pela macroalga marinha sargassum filipendula
Autor(a) principal: | |
---|---|
Data de Publicação: | 2010 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da UERJ |
Texto Completo: | http://www.bdtd.uerj.br/handle/1/11917 |
Resumo: | Due to its low cost and ligand properties, the seaweed Sargassum filipendula is highly used as a biosorbent material for metals biosorption processes. In the present work this brown seaweed was used in the kinetic and equilibrium studies of the process of biosorption of thorium and uranium, alone and in combined solutions. Tests were performed in the range of metals concentrations from 1 to 10 mg/L and pH values 1.0 and 4.0 at 25 ±1ºC. The best condition for the biosorption of thorium was found in the low concentration of 1 mg/L at pH 1.0, while uranium was best biosorbed at the concentration of 1 mg/L at pH 4.0. The kinetic study of thorium biosorption indicated that the second-order kinetic model best represented the experimental data for the low concentration of 1 mg/L (R2= 0.9987) and 10 mg/L (R2= 0.9919) at pH 1.0; for 1.0 mg/L R2= 0.9976 at pH= 4.0, while for the most concentrated solution (10 mg/L) R2 value was equal to 09787) at pH= 4.0, following a pseudo-first order kinetics. The biosorption of uranium indicated that both kinetic models fitted the experimental data, under both experimental conditions. Equilibrium study showed an increasing thorium biosorption, for increasing initial metal concentration, reaching 96 and 54% recovery of the metal, at pH 1.0 and 4.0, respectively. The higher individual efficiencies observed were 33% biosorption for a 100 mg/L initial concentration at pH 1.0 and 71% for a 1 mg/L concentration, at pH 4.0. Experimental equilibrium data, for the element thorium, indicated a best fit on Freundlich model, at pH 1.0, while at pH 4.0 the results were best represented by the Langmuir model, due to higher determination coefficient values. Considering the uranium isotherm obtained, Freundlich model best represented experimental data, suggesting the formation of a multilayer adsorption on the surface of the biomass. Equilibrium parameters calculated from the Langmuir (kL, qmax) and Freundlich (kF, n) models, indicated a higher affinity of the biomass for thorium, in comparison to uranium in both conditions tested. The study of the binary system equilibrium showed that the biosorption of thorium was not affected by the presence of uranium in solution, due to the same uptake values observed when thorium was solely present in solution, reaching qmax= 85,95 μmol Th/g (individual) and qmax= 110,1 μmol Th/g (mixture). On the other hand, uranium biosorption was markedly affected by the presence of thorium in solution, reaching low or not significant uranium by the biomass. Key words: Biosorption, Sargassum filipendula, Thorium, Uranium. |
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Costa, Antonio Carlos Augusto dahttp://lattes.cnpq.br/9898276573670920Gonçalves, Márcia Monteiro Machadohttp://lattes.cnpq.br/1092018014181521Couri, Soniahttp://lattes.cnpq.br/8056385947559527Luna, Aderval Severinohttp://lattes.cnpq.br/0294676847895948Ferreira, Ana Cristina de Melolattes.cnpq.br/5337192887540574http://lattes.cnpq.br/1509764107253907Silva, Antonia Carolina2021-01-06T19:34:55Z2011-03-022010-03-31SILVA, Antonia Carolina. Biossorção de tório e urânio pela macroalga marinha sargassum filipendula. 2010. 104 f. Dissertação (Mestrado em Processos Químicos e Meio Ambiente) - Universidade do Estado do Rio de Janeiro, Rio de Janeiro, 2010.http://www.bdtd.uerj.br/handle/1/11917Due to its low cost and ligand properties, the seaweed Sargassum filipendula is highly used as a biosorbent material for metals biosorption processes. In the present work this brown seaweed was used in the kinetic and equilibrium studies of the process of biosorption of thorium and uranium, alone and in combined solutions. Tests were performed in the range of metals concentrations from 1 to 10 mg/L and pH values 1.0 and 4.0 at 25 ±1ºC. The best condition for the biosorption of thorium was found in the low concentration of 1 mg/L at pH 1.0, while uranium was best biosorbed at the concentration of 1 mg/L at pH 4.0. The kinetic study of thorium biosorption indicated that the second-order kinetic model best represented the experimental data for the low concentration of 1 mg/L (R2= 0.9987) and 10 mg/L (R2= 0.9919) at pH 1.0; for 1.0 mg/L R2= 0.9976 at pH= 4.0, while for the most concentrated solution (10 mg/L) R2 value was equal to 09787) at pH= 4.0, following a pseudo-first order kinetics. The biosorption of uranium indicated that both kinetic models fitted the experimental data, under both experimental conditions. Equilibrium study showed an increasing thorium biosorption, for increasing initial metal concentration, reaching 96 and 54% recovery of the metal, at pH 1.0 and 4.0, respectively. The higher individual efficiencies observed were 33% biosorption for a 100 mg/L initial concentration at pH 1.0 and 71% for a 1 mg/L concentration, at pH 4.0. Experimental equilibrium data, for the element thorium, indicated a best fit on Freundlich model, at pH 1.0, while at pH 4.0 the results were best represented by the Langmuir model, due to higher determination coefficient values. Considering the uranium isotherm obtained, Freundlich model best represented experimental data, suggesting the formation of a multilayer adsorption on the surface of the biomass. Equilibrium parameters calculated from the Langmuir (kL, qmax) and Freundlich (kF, n) models, indicated a higher affinity of the biomass for thorium, in comparison to uranium in both conditions tested. The study of the binary system equilibrium showed that the biosorption of thorium was not affected by the presence of uranium in solution, due to the same uptake values observed when thorium was solely present in solution, reaching qmax= 85,95 μmol Th/g (individual) and qmax= 110,1 μmol Th/g (mixture). On the other hand, uranium biosorption was markedly affected by the presence of thorium in solution, reaching low or not significant uranium by the biomass. Key words: Biosorption, Sargassum filipendula, Thorium, Uranium.Por ser um material de baixo custo e apresentar propriedades ligantes, a macroalga marinha Sargassum filipendula vem sendo utilizada como material biossorvente no processo de biossorção de metais. No presente trabalho a alga marrom foi utilizada no estudo cinético e de equilíbrio dos íons de tório e urânio individuais e os resultados comparados à biossorção desses metais em sistema binário. Os testes foram realizados nas concentrações 1 e 10 mg/L e pH= 1,0 e 4,0 na temperatura de 25 ±1ºC. A melhor condição para biossorção de tório foi encontrada para 1 mg/L e pH= 1,0, enquanto que para urânio foi em 1 mg/L e pH= 4,0. O estudo cinético de biossorção de tório mostrou que o modelo de segunda ordem descreve melhor os dados experimentais em 1 mg/L (R2= 0,9987) e 10 mg/L (R2= 0,9919) em pH= 1,0 e 1 mg/L (R2= 0,9976) em pH= 4,0, enquanto em 10 mg/L (R2= 0,9787) pH= 4,0 a curva encontrada representou uma cinética de primeira ordem. Para a cinética de urânio os dois modelos se adequaram bem aos dados em ambas as condições experimentais. O estudo de equilíbrio mostrou um perfil crescente de captação de tório, com uma remoção de 96% e 54% do metal em pH= 1,0 e 4,0, respectivamente, a partir da Co= 1 mg/L. A melhor eficiência de captação dos íons de urânio foi de 33% para Co= 100 mg/L em pH= 1,0 e 71% para Co= 1 mg/L em pH= 4,0. Os dados experimentais da isoterma de tório mostraram-se mais adequados ao modelo de Freundlich para pH= 1,0, enquanto que para o pH= 4,0 esses foram melhor representados pelo modelo de Langmuir, com valores de coeficiente de determinação superiores. Em relação à isoterma do urânio, o modelo de Freundlich representou bem os dados experimentais. Os parâmetros de equilíbrio calculados a partir do modelo de Langmuir (kL, qmax ) e Freundlich (kF, n) indicaram uma maior afinidade da biomassa pelos íons de tório em ambas as condições experimentais. O estudo de equilíbrio do sistema binário mostrou que a biossorção dos íons de tório não é afetada pela presença do urânio em solução. Por outro lado, a sorção do urânio foi fortemente afetada pela coexistência com os íons de tório.Submitted by Boris Flegr (boris@uerj.br) on 2021-01-06T19:34:55Z No. of bitstreams: 1 dissertacao antonia carolina silva.pdf: 909183 bytes, checksum: 152156de3030e79846cc5378ec62a10a (MD5)Made available in DSpace on 2021-01-06T19:34:55Z (GMT). No. of bitstreams: 1 dissertacao antonia carolina silva.pdf: 909183 bytes, checksum: 152156de3030e79846cc5378ec62a10a (MD5) Previous issue date: 2010-03-31application/pdfporUniversidade do Estado do Rio de JaneiroPrograma de Pós-Graduação em Engenharia QuímicaUERJBRCentro de Tecnologia e Ciências::Instituto de QuímicaBiosorption. thorium. uranium. s.filipendulaBiossorção. Sargassum filipendula. Tório. UrânioCNPQ::ENGENHARIAS::ENGENHARIA QUIMICA::PROCESSOS INDUSTRIAIS DE ENGENHARIA QUIMICABiossorção de tório e urânio pela macroalga marinha sargassum filipendulaBiosorption of thorium and uranium by marine algal sargassum filipendulainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UERJinstname:Universidade do Estado do Rio de Janeiro (UERJ)instacron:UERJORIGINALdissertacao antonia carolina silva.pdfapplication/pdf909183http://www.bdtd.uerj.br/bitstream/1/11917/1/dissertacao+antonia+carolina+silva.pdf152156de3030e79846cc5378ec62a10aMD511/119172024-02-27 15:36:04.566oai:www.bdtd.uerj.br:1/11917Biblioteca Digital de Teses e Dissertaçõeshttp://www.bdtd.uerj.br/PUBhttps://www.bdtd.uerj.br:8443/oai/requestbdtd.suporte@uerj.bropendoar:29032024-02-27T18:36:04Biblioteca Digital de Teses e Dissertações da UERJ - Universidade do Estado do Rio de Janeiro (UERJ)false |
dc.title.por.fl_str_mv |
Biossorção de tório e urânio pela macroalga marinha sargassum filipendula |
dc.title.alternative.eng.fl_str_mv |
Biosorption of thorium and uranium by marine algal sargassum filipendula |
title |
Biossorção de tório e urânio pela macroalga marinha sargassum filipendula |
spellingShingle |
Biossorção de tório e urânio pela macroalga marinha sargassum filipendula Silva, Antonia Carolina Biosorption. thorium. uranium. s.filipendula Biossorção. Sargassum filipendula. Tório. Urânio CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA::PROCESSOS INDUSTRIAIS DE ENGENHARIA QUIMICA |
title_short |
Biossorção de tório e urânio pela macroalga marinha sargassum filipendula |
title_full |
Biossorção de tório e urânio pela macroalga marinha sargassum filipendula |
title_fullStr |
Biossorção de tório e urânio pela macroalga marinha sargassum filipendula |
title_full_unstemmed |
Biossorção de tório e urânio pela macroalga marinha sargassum filipendula |
title_sort |
Biossorção de tório e urânio pela macroalga marinha sargassum filipendula |
author |
Silva, Antonia Carolina |
author_facet |
Silva, Antonia Carolina |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Costa, Antonio Carlos Augusto da |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/9898276573670920 |
dc.contributor.referee1.fl_str_mv |
Gonçalves, Márcia Monteiro Machado |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/1092018014181521 |
dc.contributor.referee2.fl_str_mv |
Couri, Sonia |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/8056385947559527 |
dc.contributor.referee3.fl_str_mv |
Luna, Aderval Severino |
dc.contributor.referee3Lattes.fl_str_mv |
http://lattes.cnpq.br/0294676847895948 |
dc.contributor.referee4.fl_str_mv |
Ferreira, Ana Cristina de Melo |
dc.contributor.referee4Lattes.fl_str_mv |
lattes.cnpq.br/5337192887540574 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/1509764107253907 |
dc.contributor.author.fl_str_mv |
Silva, Antonia Carolina |
contributor_str_mv |
Costa, Antonio Carlos Augusto da Gonçalves, Márcia Monteiro Machado Couri, Sonia Luna, Aderval Severino Ferreira, Ana Cristina de Melo |
dc.subject.eng.fl_str_mv |
Biosorption. thorium. uranium. s.filipendula |
topic |
Biosorption. thorium. uranium. s.filipendula Biossorção. Sargassum filipendula. Tório. Urânio CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA::PROCESSOS INDUSTRIAIS DE ENGENHARIA QUIMICA |
dc.subject.por.fl_str_mv |
Biossorção. Sargassum filipendula. Tório. Urânio |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA::PROCESSOS INDUSTRIAIS DE ENGENHARIA QUIMICA |
description |
Due to its low cost and ligand properties, the seaweed Sargassum filipendula is highly used as a biosorbent material for metals biosorption processes. In the present work this brown seaweed was used in the kinetic and equilibrium studies of the process of biosorption of thorium and uranium, alone and in combined solutions. Tests were performed in the range of metals concentrations from 1 to 10 mg/L and pH values 1.0 and 4.0 at 25 ±1ºC. The best condition for the biosorption of thorium was found in the low concentration of 1 mg/L at pH 1.0, while uranium was best biosorbed at the concentration of 1 mg/L at pH 4.0. The kinetic study of thorium biosorption indicated that the second-order kinetic model best represented the experimental data for the low concentration of 1 mg/L (R2= 0.9987) and 10 mg/L (R2= 0.9919) at pH 1.0; for 1.0 mg/L R2= 0.9976 at pH= 4.0, while for the most concentrated solution (10 mg/L) R2 value was equal to 09787) at pH= 4.0, following a pseudo-first order kinetics. The biosorption of uranium indicated that both kinetic models fitted the experimental data, under both experimental conditions. Equilibrium study showed an increasing thorium biosorption, for increasing initial metal concentration, reaching 96 and 54% recovery of the metal, at pH 1.0 and 4.0, respectively. The higher individual efficiencies observed were 33% biosorption for a 100 mg/L initial concentration at pH 1.0 and 71% for a 1 mg/L concentration, at pH 4.0. Experimental equilibrium data, for the element thorium, indicated a best fit on Freundlich model, at pH 1.0, while at pH 4.0 the results were best represented by the Langmuir model, due to higher determination coefficient values. Considering the uranium isotherm obtained, Freundlich model best represented experimental data, suggesting the formation of a multilayer adsorption on the surface of the biomass. Equilibrium parameters calculated from the Langmuir (kL, qmax) and Freundlich (kF, n) models, indicated a higher affinity of the biomass for thorium, in comparison to uranium in both conditions tested. The study of the binary system equilibrium showed that the biosorption of thorium was not affected by the presence of uranium in solution, due to the same uptake values observed when thorium was solely present in solution, reaching qmax= 85,95 μmol Th/g (individual) and qmax= 110,1 μmol Th/g (mixture). On the other hand, uranium biosorption was markedly affected by the presence of thorium in solution, reaching low or not significant uranium by the biomass. Key words: Biosorption, Sargassum filipendula, Thorium, Uranium. |
publishDate |
2010 |
dc.date.issued.fl_str_mv |
2010-03-31 |
dc.date.available.fl_str_mv |
2011-03-02 |
dc.date.accessioned.fl_str_mv |
2021-01-06T19:34:55Z |
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 |
SILVA, Antonia Carolina. Biossorção de tório e urânio pela macroalga marinha sargassum filipendula. 2010. 104 f. Dissertação (Mestrado em Processos Químicos e Meio Ambiente) - Universidade do Estado do Rio de Janeiro, Rio de Janeiro, 2010. |
dc.identifier.uri.fl_str_mv |
http://www.bdtd.uerj.br/handle/1/11917 |
identifier_str_mv |
SILVA, Antonia Carolina. Biossorção de tório e urânio pela macroalga marinha sargassum filipendula. 2010. 104 f. Dissertação (Mestrado em Processos Químicos e Meio Ambiente) - Universidade do Estado do Rio de Janeiro, Rio de Janeiro, 2010. |
url |
http://www.bdtd.uerj.br/handle/1/11917 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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Universidade do Estado do Rio de Janeiro |
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Programa de Pós-Graduação em Engenharia Química |
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UERJ |
dc.publisher.country.fl_str_mv |
BR |
dc.publisher.department.fl_str_mv |
Centro de Tecnologia e Ciências::Instituto de Química |
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Universidade do Estado do Rio de Janeiro |
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Biblioteca Digital de Teses e Dissertações da UERJ |
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Biblioteca Digital de Teses e Dissertações da UERJ |
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Biblioteca Digital de Teses e Dissertações da UERJ - Universidade do Estado do Rio de Janeiro (UERJ) |
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