Síntese de uma espuma composta de poliuretano/quitosana para adsorção do corante vermelho n° 40 em batelada e leito fixo
Ano de defesa: | 2019 |
---|---|
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 Santa Maria
Centro de Tecnologia |
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Engenharia Química
|
Departamento: |
Engenharia Química
|
País: |
Brasil
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufsm.br/handle/1/20240 |
Resumo: | Polyurethane foams (PU) may be used as the immobilization matrix for chitosan, in order to overcome/minimize the disadvantages with respect to chitosan as an adsorbent. However, the polyurethane and chitosan foams synthesized to date use conventional reagents, most of which are highly costly and non-renewable. In this context, the present study aims at the synthesis of a foam composed of polyurethane/chitosan based on a polyol derived from castor oil and its application in the removal of Food red 17 dye in batch system and fixed bed. The adsorbent was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), mechanical tests (shear force and degree of swelling) and color analysis. Firstly, adsorption tests were performed to evaluate the effect of the amount of chitosan on PU synthesis, the effect of the amount of adsorbent (0.1 - 1 g) and the effect of pH (2 - 10). The batch adsorption study was performed through equilibrium isotherms, kinetic curves and thermodynamic parameters. In the fixed bed adsorption study, the rupture curves were constructed at different flow rates and bed heights and these parameters were optimized using the response surface methodology (RSM). The characterization indicated that the polyurethane/chitosan composite foam presented more adequate characteristics and adsorption potential than PU. In addition, the material presented a semi-crystalline structure, with adequate functional groups, high porosity and good mechanical properties. The Pseudo-second order model was suitable to represent the adsorption kinetics and the Sips model was appropriate to represent the equilibrium isotherms. The maximum adsorption capacity was 267.24 mg g-1, obtained at 328 K. The adsorption process was spontaneous, favorable and endothermic. Using identical adsorption conditions, the PU/chitosan composite foam was able to remove more than 98% of the dye from the solution, while the PU removed only 40%. The adsorption was favored at pH 2, using 1 g of adsorbent. Models for the forward curves, including Thomas, Yoon-Nelson and Bed Depth Service Time (BDST) were fitted to the experimental data. The optimum experimental condition for the adsorption of Food red 17 dye in fixed bed using PU/chitosan composite foam was 15 mL min-1 and bed height 6 cm. In this condition, the treated effluent volume was 2175 mL and the adsorption capacity of the column was 108.1 mg g-1. The results also showed that the Yoon-Nelson and BDST models accurately adjusted the experimental data under the optimal condition. The results showed that polyurethane foams are able to withstand chitosan, resulting in an adsorbent with better mechanical characteristics and high potential for removal of anionic dyes in aqueous media. |
id |
UFSM-20_030566afbde879e40d590f2ceb4956ae |
---|---|
oai_identifier_str |
oai:repositorio.ufsm.br:1/20240 |
network_acronym_str |
UFSM-20 |
network_name_str |
Manancial - Repositório Digital da UFSM |
repository_id_str |
|
spelling |
2021-01-04T10:55:03Z2021-01-04T10:55:03Z2019-02-18http://repositorio.ufsm.br/handle/1/20240Polyurethane foams (PU) may be used as the immobilization matrix for chitosan, in order to overcome/minimize the disadvantages with respect to chitosan as an adsorbent. However, the polyurethane and chitosan foams synthesized to date use conventional reagents, most of which are highly costly and non-renewable. In this context, the present study aims at the synthesis of a foam composed of polyurethane/chitosan based on a polyol derived from castor oil and its application in the removal of Food red 17 dye in batch system and fixed bed. The adsorbent was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), mechanical tests (shear force and degree of swelling) and color analysis. Firstly, adsorption tests were performed to evaluate the effect of the amount of chitosan on PU synthesis, the effect of the amount of adsorbent (0.1 - 1 g) and the effect of pH (2 - 10). The batch adsorption study was performed through equilibrium isotherms, kinetic curves and thermodynamic parameters. In the fixed bed adsorption study, the rupture curves were constructed at different flow rates and bed heights and these parameters were optimized using the response surface methodology (RSM). The characterization indicated that the polyurethane/chitosan composite foam presented more adequate characteristics and adsorption potential than PU. In addition, the material presented a semi-crystalline structure, with adequate functional groups, high porosity and good mechanical properties. The Pseudo-second order model was suitable to represent the adsorption kinetics and the Sips model was appropriate to represent the equilibrium isotherms. The maximum adsorption capacity was 267.24 mg g-1, obtained at 328 K. The adsorption process was spontaneous, favorable and endothermic. Using identical adsorption conditions, the PU/chitosan composite foam was able to remove more than 98% of the dye from the solution, while the PU removed only 40%. The adsorption was favored at pH 2, using 1 g of adsorbent. Models for the forward curves, including Thomas, Yoon-Nelson and Bed Depth Service Time (BDST) were fitted to the experimental data. The optimum experimental condition for the adsorption of Food red 17 dye in fixed bed using PU/chitosan composite foam was 15 mL min-1 and bed height 6 cm. In this condition, the treated effluent volume was 2175 mL and the adsorption capacity of the column was 108.1 mg g-1. The results also showed that the Yoon-Nelson and BDST models accurately adjusted the experimental data under the optimal condition. The results showed that polyurethane foams are able to withstand chitosan, resulting in an adsorbent with better mechanical characteristics and high potential for removal of anionic dyes in aqueous media.As espumas de poliuretano (PU) podem ser utilizadas como matriz de imobilização para a quitosana, com o objetivo de superar/minimizar as desvantagens em relação a quitosana como adsorvente. No entanto, as espumas de poliuretano e quitosana sintetizadas até o momento utilizam reagentes convencionais, a maioria de alto custo e não renovável. Neste contexto, o presente estudo tem por objetivo a síntese de uma espuma composta de poliuretano/quitosana a base de um poliol derivado do óleo de mamona e sua aplicação na remoção do corante vermelho n° 40 em sistema batelada e leito fixo. O adsorvente foi caracterizado a partir das análises difração de raio-X (DRX), espectroscopia no infravermelho por transformada de Fourier (FT-IR), microscopia eletrônica de varredura (MEV), ensaios mecânicos (força de cisalhamento e grau de intumescimento) e análise de cor. Primeiramente, foram realizados testes de adsorção para avaliar o efeito da quantidade de quitosana na síntese da PU, o efeito da quantidade de adsorvente (0,1 – 1 g) e o efeito do pH (2 -10). O estudo de adsorção em sistema batelada foi realizado através de isotermas de equilíbrio, curvas cinéticas e parâmetros termodinâmicos. No estudo da adsorção em leito fixo, as curvas de ruptura foram construídas em diferentes vazões e alturas de leito e esses parâmetros foram otimizados usando a metodologia de superfície de resposta (RSM). As caracterizações indicaram que a espuma composta de poliuretano/quitosana apresentou características mais adequadas e potencial de adsorção do que a PU. Além disso, o material apresentou estrutura semi-cristalina, com grupos funcionais adequados, alta porosidade e boas propriedades mecânicas. O modelo de Pseudo-segunda ordem foi adequado para representar a cinética de adsorção e o modelo de Sips foi apropriado para representar as isotermas de equilíbrio. A capacidade máxima de adsorção foi de 267,24 mg g-1, obtida a 328 K. O processo de adsorção foi espontâneo, favorável e endotérmico. Utilizando condições de adsorção idênticas, a espuma composta de PU/quitosana foi capaz de remover mais de 98% do corante da solução, enquanto o PU removeu apenas 40%. A adsorção foi favorecida em pH 2, utilizando 1 g de adsorvente. Os modelos para as curvas de avanço, incluindo Thomas, Yoon-Nelson e Bed Depth Service Time (BDST) foram ajustados aos dados experimentais. A condição experimental ótima para a adsorção do vermelho n° 40 em leito fixo usando espuma compostas de PU/quitosana foi vazão de 15 mL min–1 e altura do leito de 6 cm. Nessa condição, o volume de efluente tratado foi de 2175 mL e a capacidade de adsorção da coluna foi de 108,1 mg g–1. Os resultados também mostraram que os modelos de Yoon-Nelson e BDST ajustaram com precisão os dados experimentais sob a condição ótima. Os resultados mostraram que as espumas de poliuretano são capazes de suportar a quitosana, resultando em um adsorvente com melhores características mecânicas e com alto potencial para remoção de corantes aniônicos em meios aquosos.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESporUniversidade Federal de Santa MariaCentro de TecnologiaPrograma de Pós-Graduação em Engenharia QuímicaUFSMBrasilEngenharia QuímicaAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessAdsorçãoBateladaLeito fixoQuitosanaEspuma de poliuretanoÓleo de mamonaVermelho n° 40AdsorptionBatchFixed-bedChitosanPolyurethane foamCastor oilFood red 17CNPQ::ENGENHARIAS::ENGENHARIA QUIMICASíntese de uma espuma composta de poliuretano/quitosana para adsorção do corante vermelho n° 40 em batelada e leito fixoSynthesis of a polyurethane/chitosan composite foam for adsorption of food red 17 in batch and fixed bedinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisDotto, Guilherme Luizhttp://lattes.cnpq.br/5412544199323879Collazzo, Gabriela Carvalhohttp://lattes.cnpq.br/0650318761058659Gonçalves, Janaína Oliveirahttp://lattes.cnpq.br/9378137815366494http://lattes.cnpq.br/6427595655140669Schio, Rejiane Da Rosa300600000006600d27c00eb-4f6c-4070-b566-60f99dd556588aa84a31-3068-41d3-b396-b6ddf29aa1b692a7858c-4402-4415-9eec-97d7078225a5d78a54f1-2a03-480c-8701-1424d4f74dbcreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALDIS_PPGEQ_2019_SCHIO_REJIANE.pdfDIS_PPGEQ_2019_SCHIO_REJIANE.pdfDissertação de Mestradoapplication/pdf1805140http://repositorio.ufsm.br/bitstream/1/20240/1/DIS_PPGEQ_2019_SCHIO_REJIANE.pdf6bffdf96eafe4461ec8d53bef12f6439MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8805http://repositorio.ufsm.br/bitstream/1/20240/2/license_rdf4460e5956bc1d1639be9ae6146a50347MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-816http://repositorio.ufsm.br/bitstream/1/20240/3/license.txtf8fcb28efb1c8cf0dc096bec902bf4c4MD53TEXTDIS_PPGEQ_2019_SCHIO_REJIANE.pdf.txtDIS_PPGEQ_2019_SCHIO_REJIANE.pdf.txtExtracted texttext/plain162038http://repositorio.ufsm.br/bitstream/1/20240/4/DIS_PPGEQ_2019_SCHIO_REJIANE.pdf.txtb36128c7a427469914709545c22c00aeMD54THUMBNAILDIS_PPGEQ_2019_SCHIO_REJIANE.pdf.jpgDIS_PPGEQ_2019_SCHIO_REJIANE.pdf.jpgIM Thumbnailimage/jpeg4348http://repositorio.ufsm.br/bitstream/1/20240/5/DIS_PPGEQ_2019_SCHIO_REJIANE.pdf.jpgf39b2f16740118d375c24ef62680e345MD551/202402021-01-05 03:01:31.681oai:repositorio.ufsm.br:1/20240Q3JlYXRpdmUgQ29tbW9ucw==Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132021-01-05T06:01:31Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Síntese de uma espuma composta de poliuretano/quitosana para adsorção do corante vermelho n° 40 em batelada e leito fixo |
dc.title.alternative.eng.fl_str_mv |
Synthesis of a polyurethane/chitosan composite foam for adsorption of food red 17 in batch and fixed bed |
title |
Síntese de uma espuma composta de poliuretano/quitosana para adsorção do corante vermelho n° 40 em batelada e leito fixo |
spellingShingle |
Síntese de uma espuma composta de poliuretano/quitosana para adsorção do corante vermelho n° 40 em batelada e leito fixo Schio, Rejiane Da Rosa Adsorção Batelada Leito fixo Quitosana Espuma de poliuretano Óleo de mamona Vermelho n° 40 Adsorption Batch Fixed-bed Chitosan Polyurethane foam Castor oil Food red 17 CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Síntese de uma espuma composta de poliuretano/quitosana para adsorção do corante vermelho n° 40 em batelada e leito fixo |
title_full |
Síntese de uma espuma composta de poliuretano/quitosana para adsorção do corante vermelho n° 40 em batelada e leito fixo |
title_fullStr |
Síntese de uma espuma composta de poliuretano/quitosana para adsorção do corante vermelho n° 40 em batelada e leito fixo |
title_full_unstemmed |
Síntese de uma espuma composta de poliuretano/quitosana para adsorção do corante vermelho n° 40 em batelada e leito fixo |
title_sort |
Síntese de uma espuma composta de poliuretano/quitosana para adsorção do corante vermelho n° 40 em batelada e leito fixo |
author |
Schio, Rejiane Da Rosa |
author_facet |
Schio, Rejiane Da Rosa |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Dotto, Guilherme Luiz |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/5412544199323879 |
dc.contributor.referee1.fl_str_mv |
Collazzo, Gabriela Carvalho |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/0650318761058659 |
dc.contributor.referee2.fl_str_mv |
Gonçalves, Janaína Oliveira |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/9378137815366494 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/6427595655140669 |
dc.contributor.author.fl_str_mv |
Schio, Rejiane Da Rosa |
contributor_str_mv |
Dotto, Guilherme Luiz Collazzo, Gabriela Carvalho Gonçalves, Janaína Oliveira |
dc.subject.por.fl_str_mv |
Adsorção Batelada Leito fixo Quitosana Espuma de poliuretano Óleo de mamona Vermelho n° 40 |
topic |
Adsorção Batelada Leito fixo Quitosana Espuma de poliuretano Óleo de mamona Vermelho n° 40 Adsorption Batch Fixed-bed Chitosan Polyurethane foam Castor oil Food red 17 CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.eng.fl_str_mv |
Adsorption Batch Fixed-bed Chitosan Polyurethane foam Castor oil Food red 17 |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
description |
Polyurethane foams (PU) may be used as the immobilization matrix for chitosan, in order to overcome/minimize the disadvantages with respect to chitosan as an adsorbent. However, the polyurethane and chitosan foams synthesized to date use conventional reagents, most of which are highly costly and non-renewable. In this context, the present study aims at the synthesis of a foam composed of polyurethane/chitosan based on a polyol derived from castor oil and its application in the removal of Food red 17 dye in batch system and fixed bed. The adsorbent was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), mechanical tests (shear force and degree of swelling) and color analysis. Firstly, adsorption tests were performed to evaluate the effect of the amount of chitosan on PU synthesis, the effect of the amount of adsorbent (0.1 - 1 g) and the effect of pH (2 - 10). The batch adsorption study was performed through equilibrium isotherms, kinetic curves and thermodynamic parameters. In the fixed bed adsorption study, the rupture curves were constructed at different flow rates and bed heights and these parameters were optimized using the response surface methodology (RSM). The characterization indicated that the polyurethane/chitosan composite foam presented more adequate characteristics and adsorption potential than PU. In addition, the material presented a semi-crystalline structure, with adequate functional groups, high porosity and good mechanical properties. The Pseudo-second order model was suitable to represent the adsorption kinetics and the Sips model was appropriate to represent the equilibrium isotherms. The maximum adsorption capacity was 267.24 mg g-1, obtained at 328 K. The adsorption process was spontaneous, favorable and endothermic. Using identical adsorption conditions, the PU/chitosan composite foam was able to remove more than 98% of the dye from the solution, while the PU removed only 40%. The adsorption was favored at pH 2, using 1 g of adsorbent. Models for the forward curves, including Thomas, Yoon-Nelson and Bed Depth Service Time (BDST) were fitted to the experimental data. The optimum experimental condition for the adsorption of Food red 17 dye in fixed bed using PU/chitosan composite foam was 15 mL min-1 and bed height 6 cm. In this condition, the treated effluent volume was 2175 mL and the adsorption capacity of the column was 108.1 mg g-1. The results also showed that the Yoon-Nelson and BDST models accurately adjusted the experimental data under the optimal condition. The results showed that polyurethane foams are able to withstand chitosan, resulting in an adsorbent with better mechanical characteristics and high potential for removal of anionic dyes in aqueous media. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019-02-18 |
dc.date.accessioned.fl_str_mv |
2021-01-04T10:55:03Z |
dc.date.available.fl_str_mv |
2021-01-04T10:55:03Z |
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 |
http://repositorio.ufsm.br/handle/1/20240 |
url |
http://repositorio.ufsm.br/handle/1/20240 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.cnpq.fl_str_mv |
300600000006 |
dc.relation.confidence.fl_str_mv |
600 |
dc.relation.authority.fl_str_mv |
d27c00eb-4f6c-4070-b566-60f99dd55658 8aa84a31-3068-41d3-b396-b6ddf29aa1b6 92a7858c-4402-4415-9eec-97d7078225a5 d78a54f1-2a03-480c-8701-1424d4f74dbc |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Tecnologia |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Engenharia Química |
dc.publisher.initials.fl_str_mv |
UFSM |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Engenharia Química |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Tecnologia |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
collection |
Manancial - Repositório Digital da UFSM |
bitstream.url.fl_str_mv |
http://repositorio.ufsm.br/bitstream/1/20240/1/DIS_PPGEQ_2019_SCHIO_REJIANE.pdf http://repositorio.ufsm.br/bitstream/1/20240/2/license_rdf http://repositorio.ufsm.br/bitstream/1/20240/3/license.txt http://repositorio.ufsm.br/bitstream/1/20240/4/DIS_PPGEQ_2019_SCHIO_REJIANE.pdf.txt http://repositorio.ufsm.br/bitstream/1/20240/5/DIS_PPGEQ_2019_SCHIO_REJIANE.pdf.jpg |
bitstream.checksum.fl_str_mv |
6bffdf96eafe4461ec8d53bef12f6439 4460e5956bc1d1639be9ae6146a50347 f8fcb28efb1c8cf0dc096bec902bf4c4 b36128c7a427469914709545c22c00ae f39b2f16740118d375c24ef62680e345 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
|
_version_ |
1794524420438491136 |