Desenvolvimento de partículas magnéticas de quitosana modificadas com etilenodiamina e ferro (III) e seu emprego na remoção de arsênio (V) de águas

Detalhes bibliográficos
Autor(a) principal: Silva, Danilo de Castro
Data de Publicação: 2013
Tipo de documento: Dissertação
Idioma: por
Título da fonte: LOCUS Repositório Institucional da UFV
Texto Completo: http://locus.ufv.br/handle/123456789/2158
Resumo: In the present study, particles cross-linked magnetic chitosan modified with ethylenediamine and Fe(III) adsorption of (PMQ-EDA-Fe(III)) was prepared for As(V) ions. Prepared cross-linked magnetic PMQ-EDA-Fe(III) was characterized by means of SEM, FTIR, CHN and wide angle X-ray diffraction (XRD). The adsorption properties of cross-linked magnetic PMQ-EDA-Fe(III) toward As(V) were evaluated. Various factors affecting the uptake behavior such as pH, temperature, contact time, initial concentration of metal ion, effect of other ions and desorption were studied. The equilibrium was achieved after about 80 min for As(V) (50 mg L-1) at pH = 7. The adsorption kinetics followed the mechanism of the pseudo- second order equation for all systems studied, evidencing chemical sorption as the rate-limiting step of adsorption mechanism and not involving a mass transfer in solution. The equilibrium data were analyzed using the Langmuir and Freundlich isotherm models. According to the Langmuir model the maximum adsorption capacities were 43.48 mg g-1 for As(V) at 313.15 K. Cross-linked magnetic PMQ-EDA-Fe(III) displayed higher adsorption capacity for As(V). The inhibition by competition of anions was dependent on the type of ionic species. The metal ion-loaded cross-linked magnetic PMQ- EDA-Fe(III) were regenerated with an efficiency around 89.29 % using as -1 extracting solution sodium hydroxide 0.5 mol L (NaOH) on the first cycle and after 3th cycle of reuse, efficiency was reduced 55.74 %. Adsorption studies were performed using columns with different heights, varying from 2 to 5 cm and with flow rates of 1 and 2 mL min-1. It could be observed that the times of efficiency drops and saturation of the fixed bed column increase in accordance with size of the bed. The maximum adsorption capacity with a flow of 2 mL min -1 was 37.56 mg g-1 and for 1 mL min-1 was 25.39 mg g-1. Determination of parameters for the Bohart and Adam model presented good As(V) retention xviii capacity, where adsorptive capacity per volume of the bed, No equal to 27.8 g L-1 and the kinetic constant, K equal to 0.063 L mg -1 h-1. The actuation potential of the PMQ-EDA-Fe(III), was also tested using natural water samples contaminated with arsenic collected in the Iron Quadrangle region, MG. Results of the analyses in water showed total As concentrations varying between 0.64 and 220.6 μg L-1, demonstrating that in some samples this quantity is greater than the maximum limited recommended by Brazilian administration for monitoring of water destined for human consumption, which is 10.0 μg L -1. The As removal rate was 98.39% with the PMQ-EDA-Fe(III).
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spelling Silva, Danilo de Castrohttp://lattes.cnpq.br/4774331338120440Teófilo, Reinaldo Franciscohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4762360H4Oliveira, André Fernando dehttp://lattes.cnpq.br/6431782934661974Bellato, Carlos Robertohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4727950A6Fernandes, Raphael Bragança Alveshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4728400J8Moreira, Renata Pereira Lopeshttp://lattes.cnpq.br/27733788709067712015-03-26T13:00:35Z2014-01-272015-03-26T13:00:35Z2013-07-24SILVA, Danilo de Castro. Development of magnetic particles modified chitosan with ethylenediamine and iron (III) and its use in the removal of Arsenic(V) from water. 2013. 122 f. Dissertação (Mestrado em Agroquímica analítica; Agroquímica inorgânica e Físico-química; Agroquímica orgânica) - Universidade Federal de Viçosa, Viçosa, 2013.http://locus.ufv.br/handle/123456789/2158In the present study, particles cross-linked magnetic chitosan modified with ethylenediamine and Fe(III) adsorption of (PMQ-EDA-Fe(III)) was prepared for As(V) ions. Prepared cross-linked magnetic PMQ-EDA-Fe(III) was characterized by means of SEM, FTIR, CHN and wide angle X-ray diffraction (XRD). The adsorption properties of cross-linked magnetic PMQ-EDA-Fe(III) toward As(V) were evaluated. Various factors affecting the uptake behavior such as pH, temperature, contact time, initial concentration of metal ion, effect of other ions and desorption were studied. The equilibrium was achieved after about 80 min for As(V) (50 mg L-1) at pH = 7. The adsorption kinetics followed the mechanism of the pseudo- second order equation for all systems studied, evidencing chemical sorption as the rate-limiting step of adsorption mechanism and not involving a mass transfer in solution. The equilibrium data were analyzed using the Langmuir and Freundlich isotherm models. According to the Langmuir model the maximum adsorption capacities were 43.48 mg g-1 for As(V) at 313.15 K. Cross-linked magnetic PMQ-EDA-Fe(III) displayed higher adsorption capacity for As(V). The inhibition by competition of anions was dependent on the type of ionic species. The metal ion-loaded cross-linked magnetic PMQ- EDA-Fe(III) were regenerated with an efficiency around 89.29 % using as -1 extracting solution sodium hydroxide 0.5 mol L (NaOH) on the first cycle and after 3th cycle of reuse, efficiency was reduced 55.74 %. Adsorption studies were performed using columns with different heights, varying from 2 to 5 cm and with flow rates of 1 and 2 mL min-1. It could be observed that the times of efficiency drops and saturation of the fixed bed column increase in accordance with size of the bed. The maximum adsorption capacity with a flow of 2 mL min -1 was 37.56 mg g-1 and for 1 mL min-1 was 25.39 mg g-1. Determination of parameters for the Bohart and Adam model presented good As(V) retention xviii capacity, where adsorptive capacity per volume of the bed, No equal to 27.8 g L-1 and the kinetic constant, K equal to 0.063 L mg -1 h-1. The actuation potential of the PMQ-EDA-Fe(III), was also tested using natural water samples contaminated with arsenic collected in the Iron Quadrangle region, MG. Results of the analyses in water showed total As concentrations varying between 0.64 and 220.6 μg L-1, demonstrating that in some samples this quantity is greater than the maximum limited recommended by Brazilian administration for monitoring of water destined for human consumption, which is 10.0 μg L -1. The As removal rate was 98.39% with the PMQ-EDA-Fe(III).No presente trabalho, partículas magnéticas de quitosana quimicamente modificadas com etilenodiamina e ferro(III) (PMQ-EDA-Fe(III)) foram preparadas para a adsorção de íons As(V) e sua determinação foi feita por Espectrometria de Absorção Atômica utilizando um gerador de hidretos (EAA-GH). As partículas magnéticas PMQ-EDA-Fe(III) preparadas foram caracterizadas por meio de MEV, FTIR, CHN e difração de raio-X (XRD). As propriedades de adsorção das partículas magnéticas PMQ-EDA-Fe(III) para As(V) foram avaliadas. Vários fatores que afetam o comportamento da adsorção tais como pH, temperatura, tempo de contato, efeito de outros íons e dessorção foram estudados. O equilíbrio foi alcançado após 80 minutos aproximadamente para As(V) (50 mg L-1) em pH = 7. A cinética de adsorção segue o mecanismo da equação de pseudo-segunda ordem para todos os sistemas estudados, evidenciando sorção química como a etapa limitante do mecanismo de adsorção e não envolve uma transferência de massa em solução. Os dados de equilíbrio foram analisados usando os modelos de isoterma Langmuir e de Freundlich. De acordo com o modelo de Langmuir a C. capacidade máxima de adsorção foi 43,48 mg g-1 para As(V) a 40 ° As partículas PMQ-EDA-Fe(III) mostraram altas capacidades de adsorção para As(V). A inibição da adsorção pela competição de ânions foi dependente do tipo de espécie iônica presente. O arsenato ligado ao PMQ-EDA-Fe(III) foi regenerado com uma eficiência de cerca de 89,29 % no primeiro ciclo utilizando como solução extratora hidróxido de sódio 0,5 mol L-1 (NaOH) e após o 3° ciclo de reutilização, a eficiência reduziu para 55,74 %. Foram realizados estudos de adsorção utilizando-se colunas com diferentes alturas, variando de 2 a 5 cm, e com vazão de 1 e 2 mL min-1. Pela avaliação dos tempos de quebra de eficiência e tempo de saturação da coluna de leito fixo, pode-se observar que eles aumentam de acordo com o tamanho do leito e com a diminuição da vazão. A capacidade máxima de adsorção com a vazão de 2 xvi mL min-1 foi de 37,56 mg g-1 e com 1 mL min-1 foi de 25,39 mg g-1. A determinação dos parâmetros do modelo de Bohart e Adam mostraram uma boa capacidade de retenção de As(V), sendo a capacidade adsortiva por volume de leito (No) igual a 27,8 g L-1, e a constante cinética (K) igual a 0,063 L mg -1 h-1. O potencial de atuação do material adsorvente, também foi testado diante de amostras de águas naturais contaminadas por arsênio coletadas na região do Quadrilátero Ferrífero, MG. Os resultados das análises em água mostraram concentrações de As total variando entre 0,64 e 220,6 μg L-1, evidenciando que em algumas amostras as quantidades estão muito superiores ao limite máximo recomendado pelos órgãos brasileiros de monitoramento de águas destinadas ao consumo humano, que é de 10,0 μg L -1. Com isso, os níveis de remoção de As atingiram 98,39% com as PMQ-EDA-Fe(III).Fundação de Amparo a Pesquisa do Estado de Minas Geraisapplication/pdfporUniversidade Federal de ViçosaMestrado em AgroquímicaUFVBRAgroquímica analítica; Agroquímica inorgânica e Físico-química; Agroquímica orgânicaAdsorçãoQuitosanaArsênio (V)Adsorption, Chitosan, Arsenic (V)CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICADesenvolvimento de partículas magnéticas de quitosana modificadas com etilenodiamina e ferro (III) e seu emprego na remoção de arsênio (V) de águasDevelopment of magnetic particles modified chitosan with ethylenediamine and iron (III) and its use in the removal of Arsenic(V) from waterinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVORIGINALtexto completo.pdfapplication/pdf1334290https://locus.ufv.br//bitstream/123456789/2158/1/texto%20completo.pdfc7cef93230d49108d1ccc6f984c2e161MD51TEXTtexto completo.pdf.txttexto completo.pdf.txtExtracted texttext/plain197823https://locus.ufv.br//bitstream/123456789/2158/2/texto%20completo.pdf.txt72fa621b90d62043e88b5011db01ce19MD52THUMBNAILtexto completo.pdf.jpgtexto completo.pdf.jpgIM Thumbnailimage/jpeg3576https://locus.ufv.br//bitstream/123456789/2158/3/texto%20completo.pdf.jpg9e5f48865a9bef4fdf326dcacfdb5d76MD53123456789/21582016-04-07 23:22:19.477oai:locus.ufv.br:123456789/2158Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452016-04-08T02:22:19LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.por.fl_str_mv Desenvolvimento de partículas magnéticas de quitosana modificadas com etilenodiamina e ferro (III) e seu emprego na remoção de arsênio (V) de águas
dc.title.alternative.eng.fl_str_mv Development of magnetic particles modified chitosan with ethylenediamine and iron (III) and its use in the removal of Arsenic(V) from water
title Desenvolvimento de partículas magnéticas de quitosana modificadas com etilenodiamina e ferro (III) e seu emprego na remoção de arsênio (V) de águas
spellingShingle Desenvolvimento de partículas magnéticas de quitosana modificadas com etilenodiamina e ferro (III) e seu emprego na remoção de arsênio (V) de águas
Silva, Danilo de Castro
Adsorção
Quitosana
Arsênio (V)
Adsorption, Chitosan, Arsenic (V)
CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICA
title_short Desenvolvimento de partículas magnéticas de quitosana modificadas com etilenodiamina e ferro (III) e seu emprego na remoção de arsênio (V) de águas
title_full Desenvolvimento de partículas magnéticas de quitosana modificadas com etilenodiamina e ferro (III) e seu emprego na remoção de arsênio (V) de águas
title_fullStr Desenvolvimento de partículas magnéticas de quitosana modificadas com etilenodiamina e ferro (III) e seu emprego na remoção de arsênio (V) de águas
title_full_unstemmed Desenvolvimento de partículas magnéticas de quitosana modificadas com etilenodiamina e ferro (III) e seu emprego na remoção de arsênio (V) de águas
title_sort Desenvolvimento de partículas magnéticas de quitosana modificadas com etilenodiamina e ferro (III) e seu emprego na remoção de arsênio (V) de águas
author Silva, Danilo de Castro
author_facet Silva, Danilo de Castro
author_role author
dc.contributor.authorLattes.por.fl_str_mv http://lattes.cnpq.br/4774331338120440
dc.contributor.author.fl_str_mv Silva, Danilo de Castro
dc.contributor.advisor-co1.fl_str_mv Teófilo, Reinaldo Francisco
dc.contributor.advisor-co1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4762360H4
dc.contributor.advisor-co2.fl_str_mv Oliveira, André Fernando de
dc.contributor.advisor-co2Lattes.fl_str_mv http://lattes.cnpq.br/6431782934661974
dc.contributor.advisor1.fl_str_mv Bellato, Carlos Roberto
dc.contributor.advisor1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4727950A6
dc.contributor.referee1.fl_str_mv Fernandes, Raphael Bragança Alves
dc.contributor.referee1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4728400J8
dc.contributor.referee2.fl_str_mv Moreira, Renata Pereira Lopes
dc.contributor.referee2Lattes.fl_str_mv http://lattes.cnpq.br/2773378870906771
contributor_str_mv Teófilo, Reinaldo Francisco
Oliveira, André Fernando de
Bellato, Carlos Roberto
Fernandes, Raphael Bragança Alves
Moreira, Renata Pereira Lopes
dc.subject.por.fl_str_mv Adsorção
Quitosana
Arsênio (V)
topic Adsorção
Quitosana
Arsênio (V)
Adsorption, Chitosan, Arsenic (V)
CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICA
dc.subject.eng.fl_str_mv Adsorption, Chitosan, Arsenic (V)
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICA
description In the present study, particles cross-linked magnetic chitosan modified with ethylenediamine and Fe(III) adsorption of (PMQ-EDA-Fe(III)) was prepared for As(V) ions. Prepared cross-linked magnetic PMQ-EDA-Fe(III) was characterized by means of SEM, FTIR, CHN and wide angle X-ray diffraction (XRD). The adsorption properties of cross-linked magnetic PMQ-EDA-Fe(III) toward As(V) were evaluated. Various factors affecting the uptake behavior such as pH, temperature, contact time, initial concentration of metal ion, effect of other ions and desorption were studied. The equilibrium was achieved after about 80 min for As(V) (50 mg L-1) at pH = 7. The adsorption kinetics followed the mechanism of the pseudo- second order equation for all systems studied, evidencing chemical sorption as the rate-limiting step of adsorption mechanism and not involving a mass transfer in solution. The equilibrium data were analyzed using the Langmuir and Freundlich isotherm models. According to the Langmuir model the maximum adsorption capacities were 43.48 mg g-1 for As(V) at 313.15 K. Cross-linked magnetic PMQ-EDA-Fe(III) displayed higher adsorption capacity for As(V). The inhibition by competition of anions was dependent on the type of ionic species. The metal ion-loaded cross-linked magnetic PMQ- EDA-Fe(III) were regenerated with an efficiency around 89.29 % using as -1 extracting solution sodium hydroxide 0.5 mol L (NaOH) on the first cycle and after 3th cycle of reuse, efficiency was reduced 55.74 %. Adsorption studies were performed using columns with different heights, varying from 2 to 5 cm and with flow rates of 1 and 2 mL min-1. It could be observed that the times of efficiency drops and saturation of the fixed bed column increase in accordance with size of the bed. The maximum adsorption capacity with a flow of 2 mL min -1 was 37.56 mg g-1 and for 1 mL min-1 was 25.39 mg g-1. Determination of parameters for the Bohart and Adam model presented good As(V) retention xviii capacity, where adsorptive capacity per volume of the bed, No equal to 27.8 g L-1 and the kinetic constant, K equal to 0.063 L mg -1 h-1. The actuation potential of the PMQ-EDA-Fe(III), was also tested using natural water samples contaminated with arsenic collected in the Iron Quadrangle region, MG. Results of the analyses in water showed total As concentrations varying between 0.64 and 220.6 μg L-1, demonstrating that in some samples this quantity is greater than the maximum limited recommended by Brazilian administration for monitoring of water destined for human consumption, which is 10.0 μg L -1. The As removal rate was 98.39% with the PMQ-EDA-Fe(III).
publishDate 2013
dc.date.issued.fl_str_mv 2013-07-24
dc.date.available.fl_str_mv 2014-01-27
2015-03-26T13:00:35Z
dc.date.accessioned.fl_str_mv 2015-03-26T13:00:35Z
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dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
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dc.identifier.citation.fl_str_mv SILVA, Danilo de Castro. Development of magnetic particles modified chitosan with ethylenediamine and iron (III) and its use in the removal of Arsenic(V) from water. 2013. 122 f. Dissertação (Mestrado em Agroquímica analítica; Agroquímica inorgânica e Físico-química; Agroquímica orgânica) - Universidade Federal de Viçosa, Viçosa, 2013.
dc.identifier.uri.fl_str_mv http://locus.ufv.br/handle/123456789/2158
identifier_str_mv SILVA, Danilo de Castro. Development of magnetic particles modified chitosan with ethylenediamine and iron (III) and its use in the removal of Arsenic(V) from water. 2013. 122 f. Dissertação (Mestrado em Agroquímica analítica; Agroquímica inorgânica e Físico-química; Agroquímica orgânica) - Universidade Federal de Viçosa, Viçosa, 2013.
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dc.publisher.department.fl_str_mv Agroquímica analítica; Agroquímica inorgânica e Físico-química; Agroquímica orgânica
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