Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/122100 |
Resumo: | This study aimed to characterize and evaluate the potencial use of dried and pyrolyzed orange peel, Pear variety (Citrus sinensis) as an adsorbent material of inorganic contaminants Zinc (Zn), Aluminum (Al), Cadmium (Cd), Copper (Cu), Nickel (Ni), Lead (Pb) and organic ethylbenzene. The analysis of scanning electron microscopy (SEM) and surface area (BET) showed that the materials have porous and heterogeneous surfaces, with the increase of these characteristics with increasing pyrolysis temperature. The large number of peaks in infrared spectroscopic analysis with a Fourier transform (FTIR) showed the presence of complex materials with alcohols, phosphate and amine and carboxylic groups, these elements also found by analysis of X-ray diffraction (XRD). The thermal analysis in an oxidizing atmosphere of dry peel showed three weight loss events held in the inert atmosphere showed three pyrolysis events. The activation energy (Ea) of dry peel was calculated by the method of Osawa-Flynn-wall where it was found that the Ea analyzed under oxidizing atmosphere is clearly higher than Ea found under inert atmosphere. The thermodynamic study indicated that the adsorption processes studied are exothermic and contaminant-adsorbent interactions occurred spontaneously. The enthalpy values, all less than 40 kJ / mol, indicated that the adsorption processes are of a physical nature. It was observed that the Gibbs free energy decreases with increasing temperature, indicating that the adsorption process is more favorable at higher temperatures. The tests indicated the potential use of orange peels and its pyrolysis as adsorbent material |
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Uso de cascas de laranja como adsorvente de contaminantes no tratamento de águaResiduos agricolasResíduos industriaisAdsorçãoAguaBiomassaLaranjaThis study aimed to characterize and evaluate the potencial use of dried and pyrolyzed orange peel, Pear variety (Citrus sinensis) as an adsorbent material of inorganic contaminants Zinc (Zn), Aluminum (Al), Cadmium (Cd), Copper (Cu), Nickel (Ni), Lead (Pb) and organic ethylbenzene. The analysis of scanning electron microscopy (SEM) and surface area (BET) showed that the materials have porous and heterogeneous surfaces, with the increase of these characteristics with increasing pyrolysis temperature. The large number of peaks in infrared spectroscopic analysis with a Fourier transform (FTIR) showed the presence of complex materials with alcohols, phosphate and amine and carboxylic groups, these elements also found by analysis of X-ray diffraction (XRD). The thermal analysis in an oxidizing atmosphere of dry peel showed three weight loss events held in the inert atmosphere showed three pyrolysis events. The activation energy (Ea) of dry peel was calculated by the method of Osawa-Flynn-wall where it was found that the Ea analyzed under oxidizing atmosphere is clearly higher than Ea found under inert atmosphere. The thermodynamic study indicated that the adsorption processes studied are exothermic and contaminant-adsorbent interactions occurred spontaneously. The enthalpy values, all less than 40 kJ / mol, indicated that the adsorption processes are of a physical nature. It was observed that the Gibbs free energy decreases with increasing temperature, indicating that the adsorption process is more favorable at higher temperatures. The tests indicated the potential use of orange peels and its pyrolysis as adsorbent materialEste trabalho objetivou-se a caracterizar e avaliar a potencialiabilidade da utilização de cascas secas e pirolisadas de laranja, variedade Pêra (Citrus sinensis) como material adsorvente dos contaminantes inorgânicos Zinco (Zn), Alumínio (Al), Cádmio (Cd), Cobre (Cu), Níquel (Ni) e Chumbo (Pb) e do orgânico Etilbenzeno. As análises de microscopia eletrônica de varredura (MEV) e de área superficial (BET) mostraram que os materiais possuem superficies porosas e heterogêneas, com o aumento dessas características com o aumento da temperatura de pirólise. O grande número de picos na análise de espectroscopia de infravermelho com transformada de Fourrier (FTIR) indicaram materiais complexos com presença de álcoois, fosfato e grupos amina e carboxílicos, elementos esses encontrados também pela análise de difração de raios-x (DRX). A análise térmica em atmosfera oxidante da casca seca mostrou três eventos de perda de massa, a realizada em atmosfera inerte mostrou três eventos de pirólise. A energia de ativação (Ea) da casca seca foi calculada pelo método de Osawa-Flynn-Wall, onde observou-se que a Ea analisada sob atmosfera oxidante é claramente mais elevada do que a Ea encontrada sob atmosfera inerte. O estudo termodinâmico indicou que os processos de adsorção estudados são exotérmicos e as interações contaminante-adsorvente ocorreram de forma espontânea. Os valores de entalpia, todos menores do que 40 kJ/mol, indicaram que os processos adsortivos são de natureza física. Observou-se que a Energia livre de Gibbs diminuiu com o aumento da temperatura, mostrando que o processo de adsorção é mais favorável em temperaturas mais altas. Os testes realizados indicaram o uso potencial de cascas de laranja e de suas pirólises como material adsorventeFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade Estadual Paulista (Unesp)Morais, Leandro Cardoso de [UNESP]Universidade Estadual Paulista (Unesp)Santos, Carolina Monteiro [UNESP]2015-04-09T12:28:21Z2015-04-09T12:28:21Z2015-02-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis144 p. : il.application/pdfSANTOS, Carolina Monteiro. Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água. 2015. 144 p. Dissertação (mestrado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Campus Experimental de Sorocaba, 2015.http://hdl.handle.net/11449/122100000820399000820399.pdf33004170001P699005704200987400000-0003-1468-5453Alephreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporinfo:eu-repo/semantics/openAccess2023-12-06T06:14:27Zoai:repositorio.unesp.br:11449/122100Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:35:29.382227Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água |
title |
Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água |
spellingShingle |
Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água Santos, Carolina Monteiro [UNESP] Residuos agricolas Resíduos industriais Adsorção Agua Biomassa Laranja |
title_short |
Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água |
title_full |
Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água |
title_fullStr |
Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água |
title_full_unstemmed |
Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água |
title_sort |
Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água |
author |
Santos, Carolina Monteiro [UNESP] |
author_facet |
Santos, Carolina Monteiro [UNESP] |
author_role |
author |
dc.contributor.none.fl_str_mv |
Morais, Leandro Cardoso de [UNESP] Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Santos, Carolina Monteiro [UNESP] |
dc.subject.por.fl_str_mv |
Residuos agricolas Resíduos industriais Adsorção Agua Biomassa Laranja |
topic |
Residuos agricolas Resíduos industriais Adsorção Agua Biomassa Laranja |
description |
This study aimed to characterize and evaluate the potencial use of dried and pyrolyzed orange peel, Pear variety (Citrus sinensis) as an adsorbent material of inorganic contaminants Zinc (Zn), Aluminum (Al), Cadmium (Cd), Copper (Cu), Nickel (Ni), Lead (Pb) and organic ethylbenzene. The analysis of scanning electron microscopy (SEM) and surface area (BET) showed that the materials have porous and heterogeneous surfaces, with the increase of these characteristics with increasing pyrolysis temperature. The large number of peaks in infrared spectroscopic analysis with a Fourier transform (FTIR) showed the presence of complex materials with alcohols, phosphate and amine and carboxylic groups, these elements also found by analysis of X-ray diffraction (XRD). The thermal analysis in an oxidizing atmosphere of dry peel showed three weight loss events held in the inert atmosphere showed three pyrolysis events. The activation energy (Ea) of dry peel was calculated by the method of Osawa-Flynn-wall where it was found that the Ea analyzed under oxidizing atmosphere is clearly higher than Ea found under inert atmosphere. The thermodynamic study indicated that the adsorption processes studied are exothermic and contaminant-adsorbent interactions occurred spontaneously. The enthalpy values, all less than 40 kJ / mol, indicated that the adsorption processes are of a physical nature. It was observed that the Gibbs free energy decreases with increasing temperature, indicating that the adsorption process is more favorable at higher temperatures. The tests indicated the potential use of orange peels and its pyrolysis as adsorbent material |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-04-09T12:28:21Z 2015-04-09T12:28:21Z 2015-02-10 |
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.uri.fl_str_mv |
SANTOS, Carolina Monteiro. Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água. 2015. 144 p. Dissertação (mestrado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Campus Experimental de Sorocaba, 2015. http://hdl.handle.net/11449/122100 000820399 000820399.pdf 33004170001P6 9900570420098740 0000-0003-1468-5453 |
identifier_str_mv |
SANTOS, Carolina Monteiro. Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água. 2015. 144 p. Dissertação (mestrado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Campus Experimental de Sorocaba, 2015. 000820399 000820399.pdf 33004170001P6 9900570420098740 0000-0003-1468-5453 |
url |
http://hdl.handle.net/11449/122100 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
144 p. : il. application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
publisher.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.source.none.fl_str_mv |
Aleph reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129092539645952 |