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Previous issue date: 2015-08-25 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / O consumo desenfreado de equipamentos eletr?nicos juntamente com a r?pida imers?o de novas tecnologias no mercado impulsiona o crescimento acelerado de res?duos eletroeletr?nicos. Esses res?duos s?lidos, em sua maioria, contem placas de circuito impresso em sua estrutura. Estas, por apresentarem muitos metais dentre eles metais pesados, s?o altamente t?xicas. Os res?duos eletr?nicos s?o descartados de forma indevida e indiscriminadamente, normalmente sem nenhum tratamento e junto com os demais res?duos urbanos, contaminando o meio ambiente e causando graves problemas a sa?de humana. Al?m desses metais, h? tamb?m metais preciosos e de base de alto valor agregado, que podem ser recuperados e reciclados, reduzindo a explora??o dos recursos naturais. Assim, devido ao alto potencial de crescimento e reutiliza??o desses res?duos, processos de tratamento, de caracteriza??o e de separa??o foram aplicados ?s placas de circuito impresso. As placas foram submetidas a tratamentos f?sicos, como desmantelamento, moagem, separa??o granulom?trica, separa??o magn?tica e por tratamentos qu?micos como pir?lise e lixivia??o. Atrav?s dos processos de caracteriza??o (pir?lise e lixivia??o) as propor??es dos componentes das faixas granulom?tricas foram determinadas: 46,08% de metais; 23,32% de pol?meros e 30,60% de cer?micos. Observou-se tamb?m pela separa??o granulom?trica, que os componentes met?licos tendem a se concentrarem nas fra??es mais grosseiras, enquanto que os materiais polim?ricos e cer?micos nas fra??es finas. Do processo de separa??o magn?tica obteve-se 12,08% de material magn?tico e 82,33% de material n?o magn?tico. / The unbridled consumption of electronic equipment associated with fast immersion of new technologies on the market leads to the accelerated growth of electronic waste. Such waste mostly contains printed circuit boards in its structure. Printed circuit boards have many metals, including heavy metals, being highly toxic. Electronic waste is discarded improperly and indiscriminately, usually without any previous treatment and with other municipal waste, contaminating the environment and causing serious problems to human health. Beyond these metals, there are also precious metals and high value-added basis, that can be recovered and recycled, reducing the exploration of natural resources. Thus, due to the high growth potential and reuse of these waste treatment processes, characterization and separation were applied to the printed circuit boards. The printed circuit boards were subjected to physical treatments such as dismantling, crushing, sizing separation, magnetic separation and chemical treatments such as pyrolysis and leaching. Through characterization process (pyrolysis and leaching) the proportions of the components of the granulometric range were determined: 46,08% of metals; 23,32% of polymers and 30,60% of ceramics. It was also observed by particle size separation that metal components tend to concentrate in coarse fractions, while polymeric and ceramic components in fine fractions. From the magnetic separation process was obtained 12,08% of magnetic material and 82,33% of non-magnetic material.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20607 |
| Date | 25 August 2015 |
| Creators | Medeiros, Nat?lia Moraes |
| Contributors | 13681389420, http://lattes.cnpq.br/1030834608582624, Moriyama, Andr? Luis Lopes, 06663278401, http://lattes.cnpq.br/5552878900145656, Silva, Gilson Garcia da, 56634161453, http://lattes.cnpq.br/8681275097040450, Lucena, Luciana de Figueiredo Lopes, 79819338468, http://lattes.cnpq.br/5893551656862490, Souza, Carlson Pereira de |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA QU?MICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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