Adsorventes compostos de ferro, alumínio e lantânio: síntese, caracterização e aplicação na remoção de fluoretos
Autor(a) principal: | |
---|---|
Data de Publicação: | 2022 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações do UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/27530 |
Resumo: | The use of groundwater to obtain water for human consumption is an alternative for places where there is no nearby surface spring available, or where there is no water treated by concessionaires being distributed to population. Fluoride is an ion commonly found in underground sources, which when consumed in concentrations that exceed the limits established by the WHO and Brazilian legislation on water potability (1.5 mg. L-¹), for prolonged periods, can cause damage to health. Among the methodologies for fluoride removal, adsorption is a technique that stands out for being one of the most efficient in terms of cost, design, and operation. Although adsorbents with consolidated commercial use already exist, such as alumina, the development of new materials for specific application in groundwater has become a challenge. In this work, Fe-Al-La trioxide hydrated adsorbents, pure and supported on granular alumina were synthesized, characterized, and tested for fluoride removal from water. A Rotational Central Composite Design was performed for two factors (pH and adsorbent dosage), with response surface methodology, and the results for the pure adsorbent showed that the material presents fluoride adsorption property in the pH range from 4 to 10, with ideal pH at 8.25, and the adsorbent dosage defined as ideal for the following experiments was 1.5 g L−¹. The obtained results for the percentage removal for Fe-Al-La supported-on alumina made it possible to find the ideal conditions for the kinetic and equilibrium tests: 3.0 g L-¹ of adsorbent dosage and pH of 6.5. Subsequently, assays of fluoride adsorption kinetics and isotherms were carried out. The kinetics of adsorption tests showed that the kinetic model of linear driving force was the one that most adequately described the kinetics of fluoride adsorption for the pure adsorbent, while it was Avrami for the adsorbent supported on alumina, presenting R2 values ≥ 0.99 in both cases. The results of the fluoride adsorption isotherm tests indicated that the Langmuir isotherm model fitted better to the experimental data for the two adsorbents, reaching qmax of 28.06 mg g-¹ and 8.170 mg g-¹ for pure and supported adsorbent, respectively. A study was carried out with groundwater obtained from a well in Faxinal do Soturno/RS, using the pure adsorbent and under experimental conditions of room temperature, natural pH of the water, and adsorbent dosage of 1.5 mg L-¹, and as a result an average removal of 52% was reached in one hour of adsorption. Also, the effect of interfering ions was evaluated for the alumina-supported adsorbent, and the following order of ionic affinity of the adsorbent was found F- > SO4 ²- > Cl- > NO3-. It is concluded that the Fe-Al-La adsorbent, when pure, has a much greater adsorption capacity than when supported on alumina, demonstrating a high potential to be used in the removal of fluorides from groundwater. |
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2023-01-09T18:34:52Z2023-01-09T18:34:52Z2022-11-11http://repositorio.ufsm.br/handle/1/27530The use of groundwater to obtain water for human consumption is an alternative for places where there is no nearby surface spring available, or where there is no water treated by concessionaires being distributed to population. Fluoride is an ion commonly found in underground sources, which when consumed in concentrations that exceed the limits established by the WHO and Brazilian legislation on water potability (1.5 mg. L-¹), for prolonged periods, can cause damage to health. Among the methodologies for fluoride removal, adsorption is a technique that stands out for being one of the most efficient in terms of cost, design, and operation. Although adsorbents with consolidated commercial use already exist, such as alumina, the development of new materials for specific application in groundwater has become a challenge. In this work, Fe-Al-La trioxide hydrated adsorbents, pure and supported on granular alumina were synthesized, characterized, and tested for fluoride removal from water. A Rotational Central Composite Design was performed for two factors (pH and adsorbent dosage), with response surface methodology, and the results for the pure adsorbent showed that the material presents fluoride adsorption property in the pH range from 4 to 10, with ideal pH at 8.25, and the adsorbent dosage defined as ideal for the following experiments was 1.5 g L−¹. The obtained results for the percentage removal for Fe-Al-La supported-on alumina made it possible to find the ideal conditions for the kinetic and equilibrium tests: 3.0 g L-¹ of adsorbent dosage and pH of 6.5. Subsequently, assays of fluoride adsorption kinetics and isotherms were carried out. The kinetics of adsorption tests showed that the kinetic model of linear driving force was the one that most adequately described the kinetics of fluoride adsorption for the pure adsorbent, while it was Avrami for the adsorbent supported on alumina, presenting R2 values ≥ 0.99 in both cases. The results of the fluoride adsorption isotherm tests indicated that the Langmuir isotherm model fitted better to the experimental data for the two adsorbents, reaching qmax of 28.06 mg g-¹ and 8.170 mg g-¹ for pure and supported adsorbent, respectively. A study was carried out with groundwater obtained from a well in Faxinal do Soturno/RS, using the pure adsorbent and under experimental conditions of room temperature, natural pH of the water, and adsorbent dosage of 1.5 mg L-¹, and as a result an average removal of 52% was reached in one hour of adsorption. Also, the effect of interfering ions was evaluated for the alumina-supported adsorbent, and the following order of ionic affinity of the adsorbent was found F- > SO4 ²- > Cl- > NO3-. It is concluded that the Fe-Al-La adsorbent, when pure, has a much greater adsorption capacity than when supported on alumina, demonstrating a high potential to be used in the removal of fluorides from groundwater.O uso de mananciais subterrâneos para obtenção de água para consumo humano é uma alternativa para locais onde não há manancial superficial próximo disponível, ou não há água tratada por concessionárias sendo distribuída à população. O fluoreto é um íon comumente encontrado em mananciais subterrâneos, que quando consumido em concentrações que excedem os limites estabelecidos pela OMS e legislação brasileira de potabilidade de água (1,5 mg. L-¹), por períodos prolongados, podem provocar prejuízos à saúde. Entre as metodologias para remoção de fluoretos, a adsorção é uma técnica que se destaca por ser uma das mais eficientes em termos de custo, concepção e operação. Apesar de já existirem adsorventes de uso comercial consolidado, como a alumina, o desenvolvimento de novos materiais para aplicação específica em águas subterrâneas tornou-se um desafio. Neste trabalho, foram sintetizados os adsorventes trióxido hidratado de Fe-Al-La, puro e suportado em alumina granular, e estes foram caracterizados e testados para remoção de fluoretos da água. Foi realizado um Delineamento Composto Central Rotacional para dois fatores (pH e dosagem de adsorvente), com metodologia de superfície de resposta, e os resultados para o adsorvente puro mostraram que o material apresenta propriedade de adsorção de fluoreto na faixa de pH de 4 a 10, com pH ideal em 8,25, e a dosagem de adsorvente definida como a ideal para os experimentos seguintes foi de 1,5 g L−¹. Já para o adsorvente Fe-Al-La suportado em alumina os resultados para remoção percentual obtidos possibilitaram encontrar as condições ideais para os ensaios de cinética e equilíbrio, 3,0 g L-¹ de dosagem de adsorvente e pH de 6,5. Posteriormente, foram realizados ensaios de cinética e isotermas adsorção de fluoreto. Os resultados dos ensaios de cinética de adsorção demonstraram que o modelo cinético de força motriz linear foi o que descreveu mais adequadamente a cinética de adsorção de fluoreto para o adsorvente puro, enquanto para o adsorvente suportado em alumina, foi o modelo cinético de Avrami, apresentando valores de R2 ≥ 0,99 nos dois casos. Os resultados dos ensaios de isotermas de adsorção de fluoreto indicaram que o modelo de isoterma de Langmuir se ajustou melhor aos dados experimentais para os dois adsorventes, atingindo qmax de 28,06 mg g-¹ e 8,170 mg g-¹ para o adsorvente puro e suportado, respectivamente. Foi realizado um estudo com água subterrânea obtida em um poço no município de Faxinal do Soturno/RS, utilizando o adsorvente puro e nas condições experimentais de temperatura ambiente, pH natural da água, e dosagem de adsorvente de 1,5 mg L-¹, e como resultado uma remoção média de 52% foi atingida em uma hora de adsorção. Ainda, o efeito dos íons interferentes foi avaliado para o adsorvente suportado em alumina, e foi encontrada a seguinte ordem de afinidade iônica do adsorvente: F ‐ > SO4²‐ > Cl‐ > NO3‐. Conclui-se que o adsorvente Fe-Al-La quando puro possui uma capacidade de adsorção bem maior que quando suportado em alumina, demonstrando alto potencial para ser utilizado na remoção de fluoretos de águas subterrâneas.porUniversidade 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/openAccessSíntese de adsorventeÓxidos metálicosFerroAlumínioLantânioDesfluoretaçãoÁguas subterrâneasIons fluoretoAdsorbent synthesisMetal oxidesIronAluminumLanthanumDefluoridationGroundwaterFluoride ionsCNPQ::ENGENHARIAS::ENGENHARIA QUIMICAAdsorventes compostos de ferro, alumínio e lantânio: síntese, caracterização e aplicação na remoção de fluoretosIron, aluminum and lanthanum compound adsovents: synthesis, characterization and application in fluoride removalinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisJahn, Sérgio Luizhttp://lattes.cnpq.br/7735147410610776Carissimi, ElvisDotto, Guilherme LuizMallmann, Evandro StoffelsOliveira, Jivago Schumacher deSilva, William Leonardo dahttp://lattes.cnpq.br/6498156601515474Gasparotto, Juliana Machado300600000006600600600600600600600600bde015d5-5b86-4fa0-a49b-46d96b916908d44292fa-8507-416c-a4b7-3c3e13b3e6aa0c01df6e-43c5-4449-806a-abfe19298660e0844fc7-d3e2-41b0-99b4-4470c9da324cb1e72331-7994-439f-b3a7-dd111f6b0a84dca505d3-e3f6-4f16-8754-0b83a3c80bc5b113a7ee-9ce6-4804-97a7-ab7536f6f8d1reponame:Biblioteca Digital de Teses e Dissertações do UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMCC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8805http://repositorio.ufsm.br/bitstream/1/27530/2/license_rdf4460e5956bc1d1639be9ae6146a50347MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-816http://repositorio.ufsm.br/bitstream/1/27530/3/license.txtf8fcb28efb1c8cf0dc096bec902bf4c4MD53ORIGINALTES_PPGEQ_2022_GASPAROTTO_JULIANA.pdfTES_PPGEQ_2022_GASPAROTTO_JULIANA.pdfTese de Doutoradoapplication/pdf2492467http://repositorio.ufsm.br/bitstream/1/27530/1/TES_PPGEQ_2022_GASPAROTTO_JULIANA.pdf1fd61f45f087d2e4cfcf10414d44e33aMD511/275302023-01-09 15:34:52.257oai:repositorio.ufsm.br:1/27530Q3JlYXRpdmUgQ29tbW9ucw==Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2023-01-09T18:34:52Biblioteca Digital de Teses e Dissertações do UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Adsorventes compostos de ferro, alumínio e lantânio: síntese, caracterização e aplicação na remoção de fluoretos |
dc.title.alternative.eng.fl_str_mv |
Iron, aluminum and lanthanum compound adsovents: synthesis, characterization and application in fluoride removal |
title |
Adsorventes compostos de ferro, alumínio e lantânio: síntese, caracterização e aplicação na remoção de fluoretos |
spellingShingle |
Adsorventes compostos de ferro, alumínio e lantânio: síntese, caracterização e aplicação na remoção de fluoretos Gasparotto, Juliana Machado Síntese de adsorvente Óxidos metálicos Ferro Alumínio Lantânio Desfluoretação Águas subterrâneas Ions fluoreto Adsorbent synthesis Metal oxides Iron Aluminum Lanthanum Defluoridation Groundwater Fluoride ions CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Adsorventes compostos de ferro, alumínio e lantânio: síntese, caracterização e aplicação na remoção de fluoretos |
title_full |
Adsorventes compostos de ferro, alumínio e lantânio: síntese, caracterização e aplicação na remoção de fluoretos |
title_fullStr |
Adsorventes compostos de ferro, alumínio e lantânio: síntese, caracterização e aplicação na remoção de fluoretos |
title_full_unstemmed |
Adsorventes compostos de ferro, alumínio e lantânio: síntese, caracterização e aplicação na remoção de fluoretos |
title_sort |
Adsorventes compostos de ferro, alumínio e lantânio: síntese, caracterização e aplicação na remoção de fluoretos |
author |
Gasparotto, Juliana Machado |
author_facet |
Gasparotto, Juliana Machado |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Jahn, Sérgio Luiz |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/7735147410610776 |
dc.contributor.advisor-co1.fl_str_mv |
Carissimi, Elvis |
dc.contributor.referee1.fl_str_mv |
Dotto, Guilherme Luiz |
dc.contributor.referee2.fl_str_mv |
Mallmann, Evandro Stoffels |
dc.contributor.referee3.fl_str_mv |
Oliveira, Jivago Schumacher de |
dc.contributor.referee4.fl_str_mv |
Silva, William Leonardo da |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/6498156601515474 |
dc.contributor.author.fl_str_mv |
Gasparotto, Juliana Machado |
contributor_str_mv |
Jahn, Sérgio Luiz Carissimi, Elvis Dotto, Guilherme Luiz Mallmann, Evandro Stoffels Oliveira, Jivago Schumacher de Silva, William Leonardo da |
dc.subject.por.fl_str_mv |
Síntese de adsorvente Óxidos metálicos Ferro Alumínio Lantânio Desfluoretação Águas subterrâneas Ions fluoreto |
topic |
Síntese de adsorvente Óxidos metálicos Ferro Alumínio Lantânio Desfluoretação Águas subterrâneas Ions fluoreto Adsorbent synthesis Metal oxides Iron Aluminum Lanthanum Defluoridation Groundwater Fluoride ions CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.eng.fl_str_mv |
Adsorbent synthesis Metal oxides Iron Aluminum Lanthanum Defluoridation Groundwater Fluoride ions |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
description |
The use of groundwater to obtain water for human consumption is an alternative for places where there is no nearby surface spring available, or where there is no water treated by concessionaires being distributed to population. Fluoride is an ion commonly found in underground sources, which when consumed in concentrations that exceed the limits established by the WHO and Brazilian legislation on water potability (1.5 mg. L-¹), for prolonged periods, can cause damage to health. Among the methodologies for fluoride removal, adsorption is a technique that stands out for being one of the most efficient in terms of cost, design, and operation. Although adsorbents with consolidated commercial use already exist, such as alumina, the development of new materials for specific application in groundwater has become a challenge. In this work, Fe-Al-La trioxide hydrated adsorbents, pure and supported on granular alumina were synthesized, characterized, and tested for fluoride removal from water. A Rotational Central Composite Design was performed for two factors (pH and adsorbent dosage), with response surface methodology, and the results for the pure adsorbent showed that the material presents fluoride adsorption property in the pH range from 4 to 10, with ideal pH at 8.25, and the adsorbent dosage defined as ideal for the following experiments was 1.5 g L−¹. The obtained results for the percentage removal for Fe-Al-La supported-on alumina made it possible to find the ideal conditions for the kinetic and equilibrium tests: 3.0 g L-¹ of adsorbent dosage and pH of 6.5. Subsequently, assays of fluoride adsorption kinetics and isotherms were carried out. The kinetics of adsorption tests showed that the kinetic model of linear driving force was the one that most adequately described the kinetics of fluoride adsorption for the pure adsorbent, while it was Avrami for the adsorbent supported on alumina, presenting R2 values ≥ 0.99 in both cases. The results of the fluoride adsorption isotherm tests indicated that the Langmuir isotherm model fitted better to the experimental data for the two adsorbents, reaching qmax of 28.06 mg g-¹ and 8.170 mg g-¹ for pure and supported adsorbent, respectively. A study was carried out with groundwater obtained from a well in Faxinal do Soturno/RS, using the pure adsorbent and under experimental conditions of room temperature, natural pH of the water, and adsorbent dosage of 1.5 mg L-¹, and as a result an average removal of 52% was reached in one hour of adsorption. Also, the effect of interfering ions was evaluated for the alumina-supported adsorbent, and the following order of ionic affinity of the adsorbent was found F- > SO4 ²- > Cl- > NO3-. It is concluded that the Fe-Al-La adsorbent, when pure, has a much greater adsorption capacity than when supported on alumina, demonstrating a high potential to be used in the removal of fluorides from groundwater. |
publishDate |
2022 |
dc.date.issued.fl_str_mv |
2022-11-11 |
dc.date.accessioned.fl_str_mv |
2023-01-09T18:34:52Z |
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2023-01-09T18:34:52Z |
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Universidade Federal de Santa Maria Centro de Tecnologia |
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Programa de Pós-Graduação em Engenharia Química |
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UFSM |
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Universidade Federal de Santa Maria Centro de Tecnologia |
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