Caracteriza??o de sistemas aquosos trif?sicos

Detalhes bibliográficos
Autor(a) principal: Abreu, Christian Silva
Data de Publicação: 2019
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UFVJM
Texto Completo: http://acervo.ufvjm.edu.br/jspui/handle/1/2039
Resumo: O presente trabalho foi realizado com apoio da Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - Brasil (CAPES) - C?digo de Financiamento 001.
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spelling Abreu, Christian SilvaLemos, Leandro Rodrigues deRoa, Juan Pedro BretasSenra, Tonimar Domiciano ArrighiUniversidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)Lemos, Leandro Rodrigues de2019-08-23T13:12:08Z2019-08-23T13:12:08Z20192019-03-28ABREU, Christian Silva. Caracteriza??o de sistemas aquosos trif?sicos. 2019. 121 p. Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Qu?mica, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, 2019.http://acervo.ufvjm.edu.br/jspui/handle/1/2039O presente trabalho foi realizado com apoio da Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - Brasil (CAPES) - C?digo de Financiamento 001.Os sistemas aquosos trif?sicos (SAT) t?m sido aplicados para extra??o e separa??o de v?rios analitos estrat?gicos, por?m, n?o h? trabalhos de caracteriza??o e defini??o dos fundamentos b?sicos de opera??o para esta t?cnica. Portanto, neste trabalho foi realizado a caracteriza??o de um SAT formado por poli(vinilpirrolidona) MM = 10 000 g mol-1 (PVP), poli(etileno glicol) MM = 10 000 g mol-1 (PEG), sulfato de l?tio e ?gua. Os resultados mostram que de forma geral, h? uma maior concentra??o de PEG, PVP e Li2SO4 nas fases superior, central e inferior, respectivamente, e que a ?gua ? o componente majorit?rio do sistema em todas as fases. O diagrama de fase do SAT foi determinado variando-se a concentra??o dos componentes no sistema e a temperatura (288,15, 298,15 e 308,15 K). Em um diagrama de fase de coordenadas tridimensionais foi poss?vel visualizar um plano que forma uma ?rea triangular de amarra??o (ATA), composto pelos pontos de composi??o de fases e o ponto global. A ATA decresce com a diminui??o das concentra??es globais (CG) dos tr?s componentes no sistema. Em concentra??es mais elevadas as ?reas s?o maiores, indicando que h? uma maior diferen?a de composi??o entre as fases. Foi demonstrado que sistemas com CG em uma mesma ATA possuem propriedades intensivas semelhantes e extensivas distintas (sempre comparado cada fase separadamente), comportamento similar ?s linhas de amarra??o dos sistemas aquosos bif?sicos. Os SAT mostraram um grande efeito de temperatura na forma??o de fases, onde um aumento de T promove um incremento na regi?o trif?sica, indicando uma contribui??o entalpica endot?rmica. Al?m disso, em concentra??es globais menores, um comportamento de invers?o de fases entre a fase rica em eletr?lito e a fase rica em PVP foi observado na temperatura de 308,15 K. Estudos de parti??o de ?ons Cu (II) no SAT mostraram que este ?on interage de forma mais eficiente com a fase rica em sal, onde o aumento da ATA provoca um incremento nesta tend?ncia. ? 298,15 K, em concentra??es globais menores, o ?on Cu(II) promove a invers?o de fases, fen?meno semelhante ao observado no estudo do efeito de temperatura. O aumento da temperatura do meio reacional tamb?m promove um incremento na concentra??o do Cu(II) para a fase rica em PVP. Assim, foi obtido o diagrama de fases para um novo sistema aquoso trif?sico, sendo que, at? onde conhecemos, este ? o primeiro trabalho que descreve de forma quantitativa as composi??es de fases e as ?reas trif?sica, bem como desenvolve a teoria da ?rea triangular de amarra??o.Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2019-08-23T13:10:52Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) christian_silva_abreu.pdf: 3182947 bytes, checksum: 0e51be90ff358a14e41f1f5aacf2786d (MD5)Approved for entry into archive by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2019-08-23T13:12:08Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) christian_silva_abreu.pdf: 3182947 bytes, checksum: 0e51be90ff358a14e41f1f5aacf2786d (MD5)Made available in DSpace on 2019-08-23T13:12:08Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) christian_silva_abreu.pdf: 3182947 bytes, checksum: 0e51be90ff358a14e41f1f5aacf2786d (MD5) Previous issue date: 2019Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)Funda??o de Amparo ? Pesquisa do Estado de Minas Gerais (FAPEMIG)Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Qu?mica, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2019.The aqueous three-phase systems (A3PS) have been used for extraction and separation of several strategic analytes, however, there are no characterization works and definition of theorical basic fundamentals for this technique. Therefore, in this work was performed the characterization of a A3PS formed by poly(vinylpyrrolidone) MM = 10,000 g mol-1(PVP), poly (ethylene glycol) MM = 10,000 g mol-1(PEG), lithium sulfate and water. The results show that the most part of the PEG, PVP and Li2SO4 are the top, central and botton phases, respectively, and the majoritary component in all phases is water. The A3PS phase diagram was obtained in function of the variation of components concentration and temperature (288.15, 298.15 and 308.15 K). The phase diagram of three-dimensional coordinates generates a plane that forms a tie-area triangular (TAT), composed by points of composition of phases and the global point. The TAT decreases with the decrease of global point (GP) of the 3 components in the system, and the TAT increase becomes the difference between the phases thermodynamics propriets biggest. The A3PS showed a strong temperature effect on the phase formation, where an increase of temperature promotes an increase in the three-phase region, indicating an endothermic enthalpy contribution. Moreover, at lower overall concentrations, a phase inversion behavior between the electrolyte rich phase and the PVP rich phase was observed at the temperature of 308.15 K. Cu(II) ion partition studies in the A3PS showed that this ion interacts more efficiently with the salt rich phase, where the TAT increase causes an increase in this tendency. At 298.15 K, at lower overall concentrations, the Cu(II) ion promotes phase inversion, a phenomenon similar to that observed in the study of the temperature. The increase in the temperature of the reaction medium also promotes an increase in the concentration of Cu(II) to the phase rich in PVP. Thus, the phase diagram for a new aqueous three-phase system was obtained, and, as far as we know, this is the first work that quantitatively describes the phase compositions and the three-phase areas, as well as develops the theory of the tie-triangular area.porUFVJMA concess?o da licen?a deste item refere-se ao ? termo de autoriza??o impresso assinado pelo autor, assim como na licen?a Creative Commons, com as seguintes condi??es: Na qualidade de titular dos direitos de autor da publica??o, autorizo a Universidade Federal dos Vales do Jequitinhonha e Mucuri e o IBICT a disponibilizar por meio de seus reposit?rios, sem ressarcimento dos direitos autorais, de acordo com a Lei n? 9610/98, o texto integral da obra disponibilizada, conforme permiss?es assinaladas, para fins de leitura, impress?o e/ou download, a t?tulo de divulga??o da produ??o cient?fica brasileira, e preserva??o, a partir desta data.info:eu-repo/semantics/openAccessCaracteriza??o de sistemas aquosos trif?sicosinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisSistema Aquoso Trif?sico (SAT)Sistema pol?mero-pol?mero-salPolivinilpirrolidona (PVP)Poli(etileno glicol) (PEG)Sulfato de L?tio (Li2SO4)Aqueous Three-phase System (A3PS)Polymer-polymer-salt systemPoly(vinylpyrrolidone)(PVP)Poly(ethylene glycol)(PEG)Lithium Sulphate (Li2SO4)reponame:Repositório Institucional da UFVJMinstname:Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)instacron:UFVJMTEXTchristian_silva_abreu.pdf.txtchristian_silva_abreu.pdf.txtExtracted texttext/plain208424http://acervo.ufvjm.edu.br/jspui/bitstream/1/2039/6/christian_silva_abreu.pdf.txt64fd90ba69cdd0e72fe34a7cf719b400MD56LICENSElicense.txtlicense.txttext/plain; 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dc.title.pt_BR.fl_str_mv Caracteriza??o de sistemas aquosos trif?sicos
title Caracteriza??o de sistemas aquosos trif?sicos
spellingShingle Caracteriza??o de sistemas aquosos trif?sicos
Abreu, Christian Silva
Sistema Aquoso Trif?sico (SAT)
Sistema pol?mero-pol?mero-sal
Polivinilpirrolidona (PVP)
Poli(etileno glicol) (PEG)
Sulfato de L?tio (Li2SO4)
Aqueous Three-phase System (A3PS)
Polymer-polymer-salt system
Poly(vinylpyrrolidone)(PVP)
Poly(ethylene glycol)(PEG)
Lithium Sulphate (Li2SO4)
title_short Caracteriza??o de sistemas aquosos trif?sicos
title_full Caracteriza??o de sistemas aquosos trif?sicos
title_fullStr Caracteriza??o de sistemas aquosos trif?sicos
title_full_unstemmed Caracteriza??o de sistemas aquosos trif?sicos
title_sort Caracteriza??o de sistemas aquosos trif?sicos
author Abreu, Christian Silva
author_facet Abreu, Christian Silva
author_role author
dc.contributor.referee.none.fl_str_mv Lemos, Leandro Rodrigues de
Roa, Juan Pedro Bretas
Senra, Tonimar Domiciano Arrighi
dc.contributor.institution.pt_BR.fl_str_mv Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
dc.contributor.author.fl_str_mv Abreu, Christian Silva
dc.contributor.advisor1.fl_str_mv Lemos, Leandro Rodrigues de
contributor_str_mv Lemos, Leandro Rodrigues de
dc.subject.keyword.pt_BR.fl_str_mv Sistema Aquoso Trif?sico (SAT)
Sistema pol?mero-pol?mero-sal
Polivinilpirrolidona (PVP)
Poli(etileno glicol) (PEG)
Sulfato de L?tio (Li2SO4)
topic Sistema Aquoso Trif?sico (SAT)
Sistema pol?mero-pol?mero-sal
Polivinilpirrolidona (PVP)
Poli(etileno glicol) (PEG)
Sulfato de L?tio (Li2SO4)
Aqueous Three-phase System (A3PS)
Polymer-polymer-salt system
Poly(vinylpyrrolidone)(PVP)
Poly(ethylene glycol)(PEG)
Lithium Sulphate (Li2SO4)
dc.subject.keyword.en.fl_str_mv Aqueous Three-phase System (A3PS)
Polymer-polymer-salt system
Poly(vinylpyrrolidone)(PVP)
Poly(ethylene glycol)(PEG)
Lithium Sulphate (Li2SO4)
description O presente trabalho foi realizado com apoio da Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - Brasil (CAPES) - C?digo de Financiamento 001.
publishDate 2019
dc.date.submitted.none.fl_str_mv 2019-03-28
dc.date.accessioned.fl_str_mv 2019-08-23T13:12:08Z
dc.date.available.fl_str_mv 2019-08-23T13:12:08Z
dc.date.issued.fl_str_mv 2019
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.citation.fl_str_mv ABREU, Christian Silva. Caracteriza??o de sistemas aquosos trif?sicos. 2019. 121 p. Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Qu?mica, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, 2019.
dc.identifier.uri.fl_str_mv http://acervo.ufvjm.edu.br/jspui/handle/1/2039
identifier_str_mv ABREU, Christian Silva. Caracteriza??o de sistemas aquosos trif?sicos. 2019. 121 p. Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Qu?mica, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, 2019.
url http://acervo.ufvjm.edu.br/jspui/handle/1/2039
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.publisher.none.fl_str_mv UFVJM
publisher.none.fl_str_mv UFVJM
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFVJM
instname:Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
instacron:UFVJM
instname_str Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
instacron_str UFVJM
institution UFVJM
reponame_str Repositório Institucional da UFVJM
collection Repositório Institucional da UFVJM
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