Produção e caracterização de carvão ativado modificado por sonicação e sua aplicação na adsorção de fármacos
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 Ciências Naturais e Exatas |
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Química
|
Departamento: |
Química
|
País: |
Brasil
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufsm.br/handle/1/15984 |
Resumo: | Water pollution by emerging contaminants such as pharmaceuticals has gained interest in recent years. These drugs have great potential in generating adverse effects for human and wildlife, since they are endocrine disruptors, bioaccumulative and potentially toxic. The release of pharmaceuticals into the water bodies occurs mainly through wastewater treatment plants because of their incomplete or inefficient removal during the conventional treatment process. Among them, ibuprofen and ketoprofen are common drugs used as pain relief. This work aimed to investigate the adsorption of these drugs by the use of standard activated carbon (SAC) and ultrasound modified activated carbon (UMAC) as adsorbent materials. The adsorbents were characterized in detail by Fourier transform infrared spectroscopy (FT–IR), X–ray diffraction (XRD), N2 adsorption isotherms (BET), helium gas picnometry, point of zero charge and scanning electron microscopy (SEM). The adsorption study was performed through the evaluation of pH effect (ranging from 2 to 10), contact time (ranging from 0 to 300 min), temperature (ranging from 25 to 55 °C) and estimation of thermodynamic parameters. Through the obtained data, adjustments to kinetic and isotherm models for both adsorbents were performed. In addition, a three–dimensional mass transfer model (PVSDM 3D) was applied to elucidate the adsorption of ibuprofen in both materials. Finally, a simulated effluent containing the contaminants under study was treated with SAC and UMAC. The results showed that UMAC presented better characteristics in comparison to SAC, such as higher surface area values, average pore diameter, pore volume and void fraction. The adsorption capacities obtained with UMAC over those obtained with SAC were about 25% and 15% higher for ibuprofen and ketoprofen, respectively. The application of the PVSDM 3D model evidenced that the ibuprofen molecule diffuses exclusively by surface diffusion and that the diffusion in the pore volume can be neglected. In addition, the simulated effluent treated with UMAC presented a removal percentage of 52% of the present compounds. These results show that the ultrasound technique has great potential to intensify the adsorption characteristics, generating a material with better features for ibuprofen and ketoprofen adsorption. |
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2019-03-27T20:06:50Z2019-03-27T20:06:50Z2019-02-08http://repositorio.ufsm.br/handle/1/15984Water pollution by emerging contaminants such as pharmaceuticals has gained interest in recent years. These drugs have great potential in generating adverse effects for human and wildlife, since they are endocrine disruptors, bioaccumulative and potentially toxic. The release of pharmaceuticals into the water bodies occurs mainly through wastewater treatment plants because of their incomplete or inefficient removal during the conventional treatment process. Among them, ibuprofen and ketoprofen are common drugs used as pain relief. This work aimed to investigate the adsorption of these drugs by the use of standard activated carbon (SAC) and ultrasound modified activated carbon (UMAC) as adsorbent materials. The adsorbents were characterized in detail by Fourier transform infrared spectroscopy (FT–IR), X–ray diffraction (XRD), N2 adsorption isotherms (BET), helium gas picnometry, point of zero charge and scanning electron microscopy (SEM). The adsorption study was performed through the evaluation of pH effect (ranging from 2 to 10), contact time (ranging from 0 to 300 min), temperature (ranging from 25 to 55 °C) and estimation of thermodynamic parameters. Through the obtained data, adjustments to kinetic and isotherm models for both adsorbents were performed. In addition, a three–dimensional mass transfer model (PVSDM 3D) was applied to elucidate the adsorption of ibuprofen in both materials. Finally, a simulated effluent containing the contaminants under study was treated with SAC and UMAC. The results showed that UMAC presented better characteristics in comparison to SAC, such as higher surface area values, average pore diameter, pore volume and void fraction. The adsorption capacities obtained with UMAC over those obtained with SAC were about 25% and 15% higher for ibuprofen and ketoprofen, respectively. The application of the PVSDM 3D model evidenced that the ibuprofen molecule diffuses exclusively by surface diffusion and that the diffusion in the pore volume can be neglected. In addition, the simulated effluent treated with UMAC presented a removal percentage of 52% of the present compounds. These results show that the ultrasound technique has great potential to intensify the adsorption characteristics, generating a material with better features for ibuprofen and ketoprofen adsorption.A poluição da água por contaminantes emergentes tais como produtos farmacêuticos, tem ganhado interesse mundial nos últimos anos. Os fármacos têm grande potencial para gerar efeitos adversos para animais e seres humanos, dado que são disruptores endócrinos, bioacumulativos e potencialmente tóxicos. A entrada de produtos farmacêuticos nos corpos de água ocorre principalmente por meio de estações de tratamento de águas residuais, devido à sua remoção incompleta ou ineficiente durante o processo normal de tratamento. Entre eles, o ibuprofeno e o cetoprofeno são fármacos comuns usados no alívio da dor. Diante disto, este trabalho investigou a adsorção destes fármacos utilizando o carvão ativado padrão (CAP) e o carvão ativado modificado por ultrassom (CAMU) como materiais adsorventes. Os adsorventes foram caracterizados detalhadamente por espectroscopia de infravermelho com transformada de Fourier (FT–IR), difração de raios X (XRD), isotermas de adsorção de N2 (BET), picnometria de gás hélio, ponto de carga zero e microscopia eletrônica de varredura (SEM). O estudo de adsorção foi realizado por meio do efeito do pH (variando de 2 a 10), do tempo de contato (variando de 0 a 300 min), da temperatura (variando de 25 a 55°C) e da estimação de parâmetros termodinâmicos. A partir dos dados obtidos, foram realizados ajustes a modelos cinéticos e de isotermas para ambos os adsorventes. Ademais, um modelo de transferência de massa tridimensional (PVSDM 3D) foi aplicado para elucidar a adsorção de ibuprofeno em ambos os carvões. Por fim, um efluente simulado contendo os contaminantes em estudo foi tratado com CAP e CAMU. Os resultados revelaram que CAMU apresentou melhores características em comparação ao CAP, tais como, maiores valores de área superficial, diâmetro médio dos poros, volume de poros e fração de vazio. As capacidades de adsorção obtidas com CAMU em relação às obtidas com CAP foram cerca de 25% e 15% maiores para o ibuprofeno e o cetoprofeno, respectivamente. A aplicação do modelo PVSDM 3D evidenciou que a molécula de ibuprofeno difunde–se exclusivamente por difusão superficial e que a difusão no volume dos poros pode ser desprezada. Além disso, o efluente simulado tratado com CAMU apresentou um percentual de 52% de remoção dos compostos presentes. Tais resultados mostram que a técnica de ultrassom tem grande potencial para intensificar as características do carvão ativado, gerando um material com melhores propriedades para a adsorção dos fármacos ibuprofeno e cetoprofeno.Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPqporUniversidade Federal de Santa MariaCentro de Ciências Naturais e ExatasPrograma de Pós-Graduação em QuímicaUFSMBrasilQuímicaAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessAdsorçãoUltrassomIbuprofenoCetoprofenoAdsorptionUltrasoundIbuprofenKetoprofenCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICAProdução e caracterização de carvão ativado modificado por sonicação e sua aplicação na adsorção de fármacosProduction and characterization of activated carbon modified by sonication and its application for pharmaceutical contaminants adsorptioninfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisDotto, Guilherme Luizhttp://lattes.cnpq.br/5412544199323879Dorneles, Lucio Strazzaboscohttp://lattes.cnpq.br/7244173039310066Cadaval Junior, Tito Roberto Sant'Annahttp://lattes.cnpq.br/8280825575674377http://lattes.cnpq.br/1025722453859443Fröhlich, Andressa Cristiana100600000000600d27c00eb-4f6c-4070-b566-60f99dd55658ac24ff40-9e49-4609-8193-dc3a0a204162016c11ea-eccc-4fc8-a476-75b7705b928d5e4e0462-66a6-4d0c-bbdd-d70a23976a3areponame:Biblioteca Digital de Teses e Dissertações do UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALDIS_PPGQUIMICA_2019_FROHLICH_ANDRESSA.pdfDIS_PPGQUIMICA_2019_FROHLICH_ANDRESSA.pdfDissertação de Mestradoapplication/pdf48952599http://repositorio.ufsm.br/bitstream/1/15984/1/DIS_PPGQUIMICA_2019_FROHLICH_ANDRESSA.pdfa2e187d6aa7ecc038ab7a97e922d5bb3MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; 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dc.title.por.fl_str_mv |
Produção e caracterização de carvão ativado modificado por sonicação e sua aplicação na adsorção de fármacos |
dc.title.alternative.eng.fl_str_mv |
Production and characterization of activated carbon modified by sonication and its application for pharmaceutical contaminants adsorption |
title |
Produção e caracterização de carvão ativado modificado por sonicação e sua aplicação na adsorção de fármacos |
spellingShingle |
Produção e caracterização de carvão ativado modificado por sonicação e sua aplicação na adsorção de fármacos Fröhlich, Andressa Cristiana Adsorção Ultrassom Ibuprofeno Cetoprofeno Adsorption Ultrasound Ibuprofen Ketoprofen CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Produção e caracterização de carvão ativado modificado por sonicação e sua aplicação na adsorção de fármacos |
title_full |
Produção e caracterização de carvão ativado modificado por sonicação e sua aplicação na adsorção de fármacos |
title_fullStr |
Produção e caracterização de carvão ativado modificado por sonicação e sua aplicação na adsorção de fármacos |
title_full_unstemmed |
Produção e caracterização de carvão ativado modificado por sonicação e sua aplicação na adsorção de fármacos |
title_sort |
Produção e caracterização de carvão ativado modificado por sonicação e sua aplicação na adsorção de fármacos |
author |
Fröhlich, Andressa Cristiana |
author_facet |
Fröhlich, Andressa Cristiana |
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 |
Dorneles, Lucio Strazzabosco |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/7244173039310066 |
dc.contributor.referee2.fl_str_mv |
Cadaval Junior, Tito Roberto Sant'Anna |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/8280825575674377 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/1025722453859443 |
dc.contributor.author.fl_str_mv |
Fröhlich, Andressa Cristiana |
contributor_str_mv |
Dotto, Guilherme Luiz Dorneles, Lucio Strazzabosco Cadaval Junior, Tito Roberto Sant'Anna |
dc.subject.por.fl_str_mv |
Adsorção Ultrassom Ibuprofeno Cetoprofeno |
topic |
Adsorção Ultrassom Ibuprofeno Cetoprofeno Adsorption Ultrasound Ibuprofen Ketoprofen CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.eng.fl_str_mv |
Adsorption Ultrasound Ibuprofen Ketoprofen |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
Water pollution by emerging contaminants such as pharmaceuticals has gained interest in recent years. These drugs have great potential in generating adverse effects for human and wildlife, since they are endocrine disruptors, bioaccumulative and potentially toxic. The release of pharmaceuticals into the water bodies occurs mainly through wastewater treatment plants because of their incomplete or inefficient removal during the conventional treatment process. Among them, ibuprofen and ketoprofen are common drugs used as pain relief. This work aimed to investigate the adsorption of these drugs by the use of standard activated carbon (SAC) and ultrasound modified activated carbon (UMAC) as adsorbent materials. The adsorbents were characterized in detail by Fourier transform infrared spectroscopy (FT–IR), X–ray diffraction (XRD), N2 adsorption isotherms (BET), helium gas picnometry, point of zero charge and scanning electron microscopy (SEM). The adsorption study was performed through the evaluation of pH effect (ranging from 2 to 10), contact time (ranging from 0 to 300 min), temperature (ranging from 25 to 55 °C) and estimation of thermodynamic parameters. Through the obtained data, adjustments to kinetic and isotherm models for both adsorbents were performed. In addition, a three–dimensional mass transfer model (PVSDM 3D) was applied to elucidate the adsorption of ibuprofen in both materials. Finally, a simulated effluent containing the contaminants under study was treated with SAC and UMAC. The results showed that UMAC presented better characteristics in comparison to SAC, such as higher surface area values, average pore diameter, pore volume and void fraction. The adsorption capacities obtained with UMAC over those obtained with SAC were about 25% and 15% higher for ibuprofen and ketoprofen, respectively. The application of the PVSDM 3D model evidenced that the ibuprofen molecule diffuses exclusively by surface diffusion and that the diffusion in the pore volume can be neglected. In addition, the simulated effluent treated with UMAC presented a removal percentage of 52% of the present compounds. These results show that the ultrasound technique has great potential to intensify the adsorption characteristics, generating a material with better features for ibuprofen and ketoprofen adsorption. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-03-27T20:06:50Z |
dc.date.available.fl_str_mv |
2019-03-27T20:06:50Z |
dc.date.issued.fl_str_mv |
2019-02-08 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/15984 |
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http://repositorio.ufsm.br/handle/1/15984 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.cnpq.fl_str_mv |
100600000000 |
dc.relation.confidence.fl_str_mv |
600 |
dc.relation.authority.fl_str_mv |
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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 Ciências Naturais e Exatas |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Química |
dc.publisher.initials.fl_str_mv |
UFSM |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Química |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Ciências Naturais e Exatas |
dc.source.none.fl_str_mv |
reponame:Biblioteca Digital de Teses e Dissertações do UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
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Biblioteca Digital de Teses e Dissertações do UFSM |
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