Preparação de biochar a partir de matérias–primas alternativas e sua aplicação na adsorção de corantes
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/20627 |
Resumo: | Contamination of natural waters has been one of the great problems of modern society. The textile and food sectors stands out especially due to the large amounts of effluents discharged into the water bodies. Thus, it is necessary the development and improvement of technologies that promote the efficient effluent treatment and are viable. In this study, biochars were produced from alternative raw materials and applied in the treatment of colored effluents. The precursor materials were pecan nutshells wastes, chitin and MDF sheets. The residues were obtained, characterized and pyrolysed, being then converted into biochars. The biochars and their precursors were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), x–ray diffraction (XRD) and surface area analysis (BET and BJH) techniques. Finally, the adsorption of different dyes was analyzed from the kinetic, equilibrium and thermodynamic viewpoints. Characterization analyzes indicated that the biochars presented adequate characteristics for adsorption, including microporous and mesoporous structures and interesting surface area. The biochar derived from pecan nutshell residues presented a surface area of 93 m2 g–1 . The maximum adsorption capacity was about 130 mg g–1 for RR141 dye and the adsorption kinetics followed the PSO model. The chitin– derived biochar presented a surface area of 275 m2 g–1 . Adsorption kinetics was well represented by the PSO model and the maximum adsorption capacity estimated by the Liu model was 1120.8 mg g–1 for the MV dye. The biochar derived from MDF sheet residues had a surface area of 218.8 m2 g –1 . The PSO and Freundlich models were the best to represent the adsorption kinetics and isotherms, respectively. The maximum adsorption capacity was 210 mg g–1 for the FR17 dye. The results showed that promising biochars can be prepared from alternative wastes using a simple process in their preparation, being a viable alternative for dye adsorption from aqueous solutions. |
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Preparação de biochar a partir de matérias–primas alternativas e sua aplicação na adsorção de corantesBiochar from alternate raw materials for application in dyes adsorptionAdsorventes alternativosÁrea de superfícieEfluentes coloridosPiróliseResíduosAlternative adsorbentsSurface areaColored effluentsPyrolysisWasteCNPQ::ENGENHARIAS::ENGENHARIA QUIMICAContamination of natural waters has been one of the great problems of modern society. The textile and food sectors stands out especially due to the large amounts of effluents discharged into the water bodies. Thus, it is necessary the development and improvement of technologies that promote the efficient effluent treatment and are viable. In this study, biochars were produced from alternative raw materials and applied in the treatment of colored effluents. The precursor materials were pecan nutshells wastes, chitin and MDF sheets. The residues were obtained, characterized and pyrolysed, being then converted into biochars. The biochars and their precursors were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), x–ray diffraction (XRD) and surface area analysis (BET and BJH) techniques. Finally, the adsorption of different dyes was analyzed from the kinetic, equilibrium and thermodynamic viewpoints. Characterization analyzes indicated that the biochars presented adequate characteristics for adsorption, including microporous and mesoporous structures and interesting surface area. The biochar derived from pecan nutshell residues presented a surface area of 93 m2 g–1 . The maximum adsorption capacity was about 130 mg g–1 for RR141 dye and the adsorption kinetics followed the PSO model. The chitin– derived biochar presented a surface area of 275 m2 g–1 . Adsorption kinetics was well represented by the PSO model and the maximum adsorption capacity estimated by the Liu model was 1120.8 mg g–1 for the MV dye. The biochar derived from MDF sheet residues had a surface area of 218.8 m2 g –1 . The PSO and Freundlich models were the best to represent the adsorption kinetics and isotherms, respectively. The maximum adsorption capacity was 210 mg g–1 for the FR17 dye. The results showed that promising biochars can be prepared from alternative wastes using a simple process in their preparation, being a viable alternative for dye adsorption from aqueous solutions.A contaminação das águas naturais tem sido um dos grandes problemas da sociedade. Os setores têxtil e alimentício apresentam especial destaque, devido às grandes quantidades de efluentes lançados nos corpos hídricos. Desse modo é preciso desenvolver e aprimorar tecnologias que promovam o tratamento eficiente de efluentes e que sejam viáveis. Neste estudo, foram produzidos biochars a partir de materiais residuais alternativos, os quais foram aplicados no tratamento de efluentes coloridos. Os materiais precursores foram resíduos de cascas de noz–pecan, quitina e chapas de MDF. Os resíduos foram obtidos, caracterizados e pirolisados, transformando–os em biochars. Os biochars e seus precursores foram caracterizados utilizando técnicas de microscopia eletrônica de varredura (MEV), espectroscopia de infravermelho com transformada de Fourier (FTIR), difração de raios–x (DRX) e análise da área superficial (BET e BJH). Por fim foi estudada a adsorção de corantes do ponto de vista cinético, de equilíbrio e termodinâmico. As análises de caracterização indicaram que os biochars apresentaram características adequadas para adsorção, incluindo estruturas microporosas e mesoporosas e suficiente área de superfície. O biochar derivado de resíduos de cascas de noz–pecan apresentou uma área de superfície de 93 m2 g–1 . A capacidade máxima de adsorção foi de cerca de 130 mg g–1 para o corante RR141 e a cinética de adsorção seguiu o modelo de PSO. O biochar derivado da quitina apresentou uma área de superfície de 275 m2 g–1 . A cinética de adsorção foi bem representada pelo modelo PSO e a capacidade máxima de adsorção, estimada pelo modelo de Liu, foi de 1120,8 mg g–1 para o corante MV. O biochar derivado de resíduos de chapas de MDF apresentou área de superfície de 218,8 m2 g –1 . Os modelos PSO e Freundlich foram os melhores modelos para representar, respectivamente a cinética e as isotermas de adsorção A capacidade máxima de adsorção foi de 210 mg g -1 para o corante FR17. Os resultados demonstraram que os biochars podem ser preparados a partir de resíduos, usando um processo simples na sua preparação, sendo uma alternativa viável para adsorção de corantes em soluções aquosas.Universidade Federal de Santa MariaBrasilEngenharia QuímicaUFSMPrograma de Pós-Graduação em Engenharia QuímicaCentro de TecnologiaDotto, Guilherme Luizhttp://lattes.cnpq.br/5412544199323879Cancelier, AdrianoXXXXXXXXXXXXXXXCastilhos, Fernanda deXXXXXXXXXXXXXXXXXXxGonçalves, Janaína OliveiraXXXXXXXXXXXXXXXCadaval Júnior, Tito Roberto Sant'annaXXXXXXXXXXXXXXXXXXXXXZazycki, Maria Amélia2021-04-19T18:36:55Z2021-04-19T18:36:55Z2019-10-25info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdfhttp://repositorio.ufsm.br/handle/1/20627porAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2021-04-20T06:03:07Zoai:repositorio.ufsm.br:1/20627Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2021-04-20T06:03:07Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Preparação de biochar a partir de matérias–primas alternativas e sua aplicação na adsorção de corantes Biochar from alternate raw materials for application in dyes adsorption |
title |
Preparação de biochar a partir de matérias–primas alternativas e sua aplicação na adsorção de corantes |
spellingShingle |
Preparação de biochar a partir de matérias–primas alternativas e sua aplicação na adsorção de corantes Zazycki, Maria Amélia Adsorventes alternativos Área de superfície Efluentes coloridos Pirólise Resíduos Alternative adsorbents Surface area Colored effluents Pyrolysis Waste CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Preparação de biochar a partir de matérias–primas alternativas e sua aplicação na adsorção de corantes |
title_full |
Preparação de biochar a partir de matérias–primas alternativas e sua aplicação na adsorção de corantes |
title_fullStr |
Preparação de biochar a partir de matérias–primas alternativas e sua aplicação na adsorção de corantes |
title_full_unstemmed |
Preparação de biochar a partir de matérias–primas alternativas e sua aplicação na adsorção de corantes |
title_sort |
Preparação de biochar a partir de matérias–primas alternativas e sua aplicação na adsorção de corantes |
author |
Zazycki, Maria Amélia |
author_facet |
Zazycki, Maria Amélia |
author_role |
author |
dc.contributor.none.fl_str_mv |
Dotto, Guilherme Luiz http://lattes.cnpq.br/5412544199323879 Cancelier, Adriano XXXXXXXXXXXXXXX Castilhos, Fernanda de XXXXXXXXXXXXXXXXXXx Gonçalves, Janaína Oliveira XXXXXXXXXXXXXXX Cadaval Júnior, Tito Roberto Sant'anna XXXXXXXXXXXXXXXXXXXXX |
dc.contributor.author.fl_str_mv |
Zazycki, Maria Amélia |
dc.subject.por.fl_str_mv |
Adsorventes alternativos Área de superfície Efluentes coloridos Pirólise Resíduos Alternative adsorbents Surface area Colored effluents Pyrolysis Waste CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
topic |
Adsorventes alternativos Área de superfície Efluentes coloridos Pirólise Resíduos Alternative adsorbents Surface area Colored effluents Pyrolysis Waste CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
description |
Contamination of natural waters has been one of the great problems of modern society. The textile and food sectors stands out especially due to the large amounts of effluents discharged into the water bodies. Thus, it is necessary the development and improvement of technologies that promote the efficient effluent treatment and are viable. In this study, biochars were produced from alternative raw materials and applied in the treatment of colored effluents. The precursor materials were pecan nutshells wastes, chitin and MDF sheets. The residues were obtained, characterized and pyrolysed, being then converted into biochars. The biochars and their precursors were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), x–ray diffraction (XRD) and surface area analysis (BET and BJH) techniques. Finally, the adsorption of different dyes was analyzed from the kinetic, equilibrium and thermodynamic viewpoints. Characterization analyzes indicated that the biochars presented adequate characteristics for adsorption, including microporous and mesoporous structures and interesting surface area. The biochar derived from pecan nutshell residues presented a surface area of 93 m2 g–1 . The maximum adsorption capacity was about 130 mg g–1 for RR141 dye and the adsorption kinetics followed the PSO model. The chitin– derived biochar presented a surface area of 275 m2 g–1 . Adsorption kinetics was well represented by the PSO model and the maximum adsorption capacity estimated by the Liu model was 1120.8 mg g–1 for the MV dye. The biochar derived from MDF sheet residues had a surface area of 218.8 m2 g –1 . The PSO and Freundlich models were the best to represent the adsorption kinetics and isotherms, respectively. The maximum adsorption capacity was 210 mg g–1 for the FR17 dye. The results showed that promising biochars can be prepared from alternative wastes using a simple process in their preparation, being a viable alternative for dye adsorption from aqueous solutions. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-25 2021-04-19T18:36:55Z 2021-04-19T18:36:55Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/20627 |
url |
http://repositorio.ufsm.br/handle/1/20627 |
dc.language.iso.fl_str_mv |
por |
language |
por |
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.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Engenharia Química UFSM Programa de Pós-Graduação em Engenharia Química Centro de Tecnologia |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Engenharia Química UFSM Programa de Pós-Graduação em Engenharia Química 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 |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
atendimento.sib@ufsm.br||tedebc@gmail.com |
_version_ |
1805922030193737728 |