Microplásticos: impacto ambiental de polímeros fotodegradados
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/12280 |
Resumo: | Plastics have been studied for their environmental impact, since when discarded in the environment they do not disappear. Over time they degrade and fragment into smaller pieces, reaching the microscale. When exposed to sunlight these materials can photodegrade, generating fragments that can be consumed by animals, either directly when confused with food or indirectly when they ingest contaminated food/animals. One way to verify and quantify the microplastics (MP) present in marine animals and invertebrate is through advanced oxidative processes (AOP). AOPs are mainly used in oxidation of persistent contaminants, but they have been used to separate organic matter and plastic fragments because of their oxidative power. In order to verify if the AOPs aggravate in some way the fragmentation of degraded polymer, it was proposed to analyze the interaction between AOPs, such as Fenton reaction and alkaline solution, and polymer samples with different photodegradation levels. Superficial changes were observed in some samples with advanced degradation levels, with higher carbonyl concentrations. Comparing the level of degradation, samples with higher carbonyl concentration showed variations post-tested, while samples without or withlow concentration of carbonyl showed no variations. With these results it was possible to confirm the interaction of some AOPs with photodegraded materials and, therefore, that this type of analysis can interfere with the amount of fragments obtained after chemical digestion of marine animals and/or invertebrate. This result helps to put into perspective the research done with invertebrates that had degraded polymers as part of their diet, since there may be an incorrect extrapolation in the amount of MP present in these animals. |
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Moreira, Ana Carolina CuglerWaldman, Walter Ruggerihttp://lattes.cnpq.br/0616238673458322Mancini, Sandro Donninihttp://lattes.cnpq.br/5091149098462301http://lattes.cnpq.br/3186005447606808419a8d97-1bc5-41df-9902-8722490ce4b52020-02-28T16:28:32Z2020-02-28T16:28:32Z2020-02-03MOREIRA, Ana Carolina Cugler. Microplásticos: impacto ambiental de polímeros fotodegradados. 2020. Dissertação (Mestrado em Ciência dos Materiais) – Universidade Federal de São Carlos, Sorocaba, 2020. Disponível em: https://repositorio.ufscar.br/handle/ufscar/12280.https://repositorio.ufscar.br/handle/ufscar/12280Plastics have been studied for their environmental impact, since when discarded in the environment they do not disappear. Over time they degrade and fragment into smaller pieces, reaching the microscale. When exposed to sunlight these materials can photodegrade, generating fragments that can be consumed by animals, either directly when confused with food or indirectly when they ingest contaminated food/animals. One way to verify and quantify the microplastics (MP) present in marine animals and invertebrate is through advanced oxidative processes (AOP). AOPs are mainly used in oxidation of persistent contaminants, but they have been used to separate organic matter and plastic fragments because of their oxidative power. In order to verify if the AOPs aggravate in some way the fragmentation of degraded polymer, it was proposed to analyze the interaction between AOPs, such as Fenton reaction and alkaline solution, and polymer samples with different photodegradation levels. Superficial changes were observed in some samples with advanced degradation levels, with higher carbonyl concentrations. Comparing the level of degradation, samples with higher carbonyl concentration showed variations post-tested, while samples without or withlow concentration of carbonyl showed no variations. With these results it was possible to confirm the interaction of some AOPs with photodegraded materials and, therefore, that this type of analysis can interfere with the amount of fragments obtained after chemical digestion of marine animals and/or invertebrate. This result helps to put into perspective the research done with invertebrates that had degraded polymers as part of their diet, since there may be an incorrect extrapolation in the amount of MP present in these animals.Plásticos vem sendo estudados pelo impacto ambiental que vem causando, uma vez que quando descartados no ambiente eles não desaparecem. Com o passar do tempo eles degradam e fragmentam em pedaços menores, podendo chegar a escala micro. Quando expostos a luz solar esses materiais podem fotodegradar, gerando fragmentos que podem ser consumidos por animais, seja de forma direta quando confundido com alimentos, ou de forma indireta quando ingerem alimentos/animais contaminados. Uma forma de verificar e quantificar os microplásticos (MP) presentes em animais marinhos e invertebrados é através de processos oxidativos avançados (POA). Os POAs são utilizados, principalmente, na oxidação de contaminantes persistentes, mas também vem sendo utilizados na separação da matéria orgânica e fragmentos plásticos por conta do seu poder oxidativo. Para verificar se os POAs agravam, de alguma forma, a fragmentação de polímeros degradados foi proposto analisar a interação entre POAs, como a reação Fenton e a solução alcalina, e amostras poliméricas com diferentes níveis de fotodegradação. Foram observadas variações superficiais em algumas amostras com níveis de degradação avançado, com maiores concentrações de carbonila. Em comparação entre o nível de degradação, as amostras com maiores concentrações de carbonila apresentaram variações pós ensaio enquanto amostras sem ou com pouca concentração de carbonila não apresentaram variações. Com estes resultados foi possível confirmar a interação de alguns POAs com os materiais fotodegradados e, portanto, que esse tipo de análise pode interferir na quantidade de fragmentos obtido após a digestão química dos animais marinhos e/ou invertebrados. Este resultado ajuda a colocar em perspectiva mais adequada a pesquisa feita com invertebrados que tiveram polímeros degradados como parte de sua dieta, uma vez que pode haver uma extrapolação incorreta na quantidade de MP presente nesses animais.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)1774198porUniversidade Federal de São CarlosCâmpus SorocabaPrograma de Pós-Graduação em Ciência dos Materiais - PPGCM-SoUFSCarAttribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessPolipropilenoDigestãoProcesso Oxidativo AvançadoFotodegradaçãoAditivosPolypropyleneDigestionAdvanced Oxidative ProcessPhotodegradationAdditivesENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS::POLIMEROS, APLICACOESMicroplásticos: impacto ambiental de polímeros fotodegradadosMIicroplastics: environmental impact of photodegraded polymersinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis600600b3e0072a-ecd7-4719-a6a2-1b70311b8e78reponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALDEFESA VERSÃO FINAL_ACCM.pdfDEFESA VERSÃO FINAL_ACCM.pdfVersão Final Tese de Mestradoapplication/pdf3804069https://repositorio.ufscar.br/bitstream/ufscar/12280/1/DEFESA%20VERS%c3%83O%20FINAL_ACCM.pdfb9278dba81e15345a7343d59e2a4b72bMD51carta comprovante_assinada_cortada.pdfcarta comprovante_assinada_cortada.pdfCarta Comprovanteapplication/pdf90858https://repositorio.ufscar.br/bitstream/ufscar/12280/2/carta%20comprovante_assinada_cortada.pdf2a5bea8a23f7c40b3760c58033a4a8ffMD52CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8811https://repositorio.ufscar.br/bitstream/ufscar/12280/3/license_rdfe39d27027a6cc9cb039ad269a5db8e34MD53TEXTDEFESA VERSÃO FINAL_ACCM.pdf.txtDEFESA VERSÃO FINAL_ACCM.pdf.txtExtracted texttext/plain137376https://repositorio.ufscar.br/bitstream/ufscar/12280/4/DEFESA%20VERS%c3%83O%20FINAL_ACCM.pdf.txt172219705a76ec1d5d930c38ad0bc534MD54carta comprovante_assinada_cortada.pdf.txtcarta comprovante_assinada_cortada.pdf.txtExtracted texttext/plain1https://repositorio.ufscar.br/bitstream/ufscar/12280/6/carta%20comprovante_assinada_cortada.pdf.txt68b329da9893e34099c7d8ad5cb9c940MD56THUMBNAILDEFESA VERSÃO FINAL_ACCM.pdf.jpgDEFESA VERSÃO FINAL_ACCM.pdf.jpgIM Thumbnailimage/jpeg6475https://repositorio.ufscar.br/bitstream/ufscar/12280/5/DEFESA%20VERS%c3%83O%20FINAL_ACCM.pdf.jpg0c559cddcb6c69e830306296f4223d3cMD55carta comprovante_assinada_cortada.pdf.jpgcarta comprovante_assinada_cortada.pdf.jpgIM Thumbnailimage/jpeg10378https://repositorio.ufscar.br/bitstream/ufscar/12280/7/carta%20comprovante_assinada_cortada.pdf.jpg953889f069d3bb79846562f7fda276bbMD57ufscar/122802023-09-18 18:31:50.717oai:repositorio.ufscar.br:ufscar/12280Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:31:50Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Microplásticos: impacto ambiental de polímeros fotodegradados |
dc.title.alternative.por.fl_str_mv |
MIicroplastics: environmental impact of photodegraded polymers |
title |
Microplásticos: impacto ambiental de polímeros fotodegradados |
spellingShingle |
Microplásticos: impacto ambiental de polímeros fotodegradados Moreira, Ana Carolina Cugler Polipropileno Digestão Processo Oxidativo Avançado Fotodegradação Aditivos Polypropylene Digestion Advanced Oxidative Process Photodegradation Additives ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS::POLIMEROS, APLICACOES |
title_short |
Microplásticos: impacto ambiental de polímeros fotodegradados |
title_full |
Microplásticos: impacto ambiental de polímeros fotodegradados |
title_fullStr |
Microplásticos: impacto ambiental de polímeros fotodegradados |
title_full_unstemmed |
Microplásticos: impacto ambiental de polímeros fotodegradados |
title_sort |
Microplásticos: impacto ambiental de polímeros fotodegradados |
author |
Moreira, Ana Carolina Cugler |
author_facet |
Moreira, Ana Carolina Cugler |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/3186005447606808 |
dc.contributor.author.fl_str_mv |
Moreira, Ana Carolina Cugler |
dc.contributor.advisor1.fl_str_mv |
Waldman, Walter Ruggeri |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0616238673458322 |
dc.contributor.advisor-co1.fl_str_mv |
Mancini, Sandro Donnini |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/5091149098462301 |
dc.contributor.authorID.fl_str_mv |
419a8d97-1bc5-41df-9902-8722490ce4b5 |
contributor_str_mv |
Waldman, Walter Ruggeri Mancini, Sandro Donnini |
dc.subject.por.fl_str_mv |
Polipropileno Digestão Processo Oxidativo Avançado Fotodegradação Aditivos Polypropylene Digestion Advanced Oxidative Process Photodegradation Additives |
topic |
Polipropileno Digestão Processo Oxidativo Avançado Fotodegradação Aditivos Polypropylene Digestion Advanced Oxidative Process Photodegradation Additives ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS::POLIMEROS, APLICACOES |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS::POLIMEROS, APLICACOES |
description |
Plastics have been studied for their environmental impact, since when discarded in the environment they do not disappear. Over time they degrade and fragment into smaller pieces, reaching the microscale. When exposed to sunlight these materials can photodegrade, generating fragments that can be consumed by animals, either directly when confused with food or indirectly when they ingest contaminated food/animals. One way to verify and quantify the microplastics (MP) present in marine animals and invertebrate is through advanced oxidative processes (AOP). AOPs are mainly used in oxidation of persistent contaminants, but they have been used to separate organic matter and plastic fragments because of their oxidative power. In order to verify if the AOPs aggravate in some way the fragmentation of degraded polymer, it was proposed to analyze the interaction between AOPs, such as Fenton reaction and alkaline solution, and polymer samples with different photodegradation levels. Superficial changes were observed in some samples with advanced degradation levels, with higher carbonyl concentrations. Comparing the level of degradation, samples with higher carbonyl concentration showed variations post-tested, while samples without or withlow concentration of carbonyl showed no variations. With these results it was possible to confirm the interaction of some AOPs with photodegraded materials and, therefore, that this type of analysis can interfere with the amount of fragments obtained after chemical digestion of marine animals and/or invertebrate. This result helps to put into perspective the research done with invertebrates that had degraded polymers as part of their diet, since there may be an incorrect extrapolation in the amount of MP present in these animals. |
publishDate |
2020 |
dc.date.accessioned.fl_str_mv |
2020-02-28T16:28:32Z |
dc.date.available.fl_str_mv |
2020-02-28T16:28:32Z |
dc.date.issued.fl_str_mv |
2020-02-03 |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/masterThesis |
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masterThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
MOREIRA, Ana Carolina Cugler. Microplásticos: impacto ambiental de polímeros fotodegradados. 2020. Dissertação (Mestrado em Ciência dos Materiais) – Universidade Federal de São Carlos, Sorocaba, 2020. Disponível em: https://repositorio.ufscar.br/handle/ufscar/12280. |
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https://repositorio.ufscar.br/handle/ufscar/12280 |
identifier_str_mv |
MOREIRA, Ana Carolina Cugler. Microplásticos: impacto ambiental de polímeros fotodegradados. 2020. Dissertação (Mestrado em Ciência dos Materiais) – Universidade Federal de São Carlos, Sorocaba, 2020. Disponível em: https://repositorio.ufscar.br/handle/ufscar/12280. |
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Universidade Federal de São Carlos Câmpus Sorocaba |
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Universidade Federal de São Carlos Câmpus Sorocaba |
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