Separation and concentration of valuable and critical materials fromwasted LEDs by physical processes
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/217257 |
Resumo: | The generation of wasted LEDs is expected to grow in the coming years, raising the challenge of recyclingand recovering their valuable and critical materials. Due to the low concentration of these materials, thecurrent recycling processes available for LEDs have a significant recovery limitation. This study proposesan innovative, clean and effective physical method to segregate the valuable and critical materials intodifferent fractions while enhancing their concentration: particle size separation followed by electrostaticseparation. After the determination of the best electrostatic separation conditions (varying tension androtation) for each particle size, the final fractions were characterized by acid digestion and ICP-OES anal-ysis. The analysis revealed that the economically valuable elements gold, silver, copper and tin becameconcentrated in the conductive fractions (80.18%, 94.22%, 96.55% and 93.29% of their total recoveredmass, respectively), while the strategic critical elements, gallium, cerium and yttrium became concen-trated in the non-conductive fractions (96.15%, 100% and 95.20% of their total recovered mass, respec-tively). Despite some limitations imposed by the mass losses, this novel route may be important touncover new recycling alternatives, mainly for critical elements, and to improve the economic viabilityof the recycling routes. |
id |
UFRGS-2_9ae13a3af7a6f069dca144a9be68360b |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/217257 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Cenci, Marcelo PilottoDal Berto, Frederico ChristCamargo, Priscila Silva SilveiraVeit, Hugo Marcelo2021-01-13T04:10:36Z20210956-053Xhttp://hdl.handle.net/10183/217257001121045The generation of wasted LEDs is expected to grow in the coming years, raising the challenge of recyclingand recovering their valuable and critical materials. Due to the low concentration of these materials, thecurrent recycling processes available for LEDs have a significant recovery limitation. This study proposesan innovative, clean and effective physical method to segregate the valuable and critical materials intodifferent fractions while enhancing their concentration: particle size separation followed by electrostaticseparation. After the determination of the best electrostatic separation conditions (varying tension androtation) for each particle size, the final fractions were characterized by acid digestion and ICP-OES anal-ysis. The analysis revealed that the economically valuable elements gold, silver, copper and tin becameconcentrated in the conductive fractions (80.18%, 94.22%, 96.55% and 93.29% of their total recoveredmass, respectively), while the strategic critical elements, gallium, cerium and yttrium became concen-trated in the non-conductive fractions (96.15%, 100% and 95.20% of their total recovered mass, respec-tively). Despite some limitations imposed by the mass losses, this novel route may be important touncover new recycling alternatives, mainly for critical elements, and to improve the economic viabilityof the recycling routes.application/pdfengWaste Management [recurso eletrônico]. Amsterdam. Vol. 120 (Feb. 2021), p. 136-145Diodo emissor de luzSeparação eletrostáticaReciclagemOuroGálioLight-emitting diodes (LED)Electrostatic separationMaterial concentrationRecyclingGoldGalliumSeparation and concentration of valuable and critical materials fromwasted LEDs by physical processesEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001121045.pdf.txt001121045.pdf.txtExtracted Texttext/plain58742http://www.lume.ufrgs.br/bitstream/10183/217257/2/001121045.pdf.txt24a8df838c7a98d6aeeae9f76bf027e4MD52ORIGINAL001121045.pdfTexto completo (inglês)application/pdf999384http://www.lume.ufrgs.br/bitstream/10183/217257/1/001121045.pdf579d0c836492dd52b4d79fffcee59156MD5110183/2172572021-03-09 04:36:45.014086oai:www.lume.ufrgs.br:10183/217257Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-03-09T07:36:45Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Separation and concentration of valuable and critical materials fromwasted LEDs by physical processes |
title |
Separation and concentration of valuable and critical materials fromwasted LEDs by physical processes |
spellingShingle |
Separation and concentration of valuable and critical materials fromwasted LEDs by physical processes Cenci, Marcelo Pilotto Diodo emissor de luz Separação eletrostática Reciclagem Ouro Gálio Light-emitting diodes (LED) Electrostatic separation Material concentration Recycling Gold Gallium |
title_short |
Separation and concentration of valuable and critical materials fromwasted LEDs by physical processes |
title_full |
Separation and concentration of valuable and critical materials fromwasted LEDs by physical processes |
title_fullStr |
Separation and concentration of valuable and critical materials fromwasted LEDs by physical processes |
title_full_unstemmed |
Separation and concentration of valuable and critical materials fromwasted LEDs by physical processes |
title_sort |
Separation and concentration of valuable and critical materials fromwasted LEDs by physical processes |
author |
Cenci, Marcelo Pilotto |
author_facet |
Cenci, Marcelo Pilotto Dal Berto, Frederico Christ Camargo, Priscila Silva Silveira Veit, Hugo Marcelo |
author_role |
author |
author2 |
Dal Berto, Frederico Christ Camargo, Priscila Silva Silveira Veit, Hugo Marcelo |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Cenci, Marcelo Pilotto Dal Berto, Frederico Christ Camargo, Priscila Silva Silveira Veit, Hugo Marcelo |
dc.subject.por.fl_str_mv |
Diodo emissor de luz Separação eletrostática Reciclagem Ouro Gálio |
topic |
Diodo emissor de luz Separação eletrostática Reciclagem Ouro Gálio Light-emitting diodes (LED) Electrostatic separation Material concentration Recycling Gold Gallium |
dc.subject.eng.fl_str_mv |
Light-emitting diodes (LED) Electrostatic separation Material concentration Recycling Gold Gallium |
description |
The generation of wasted LEDs is expected to grow in the coming years, raising the challenge of recyclingand recovering their valuable and critical materials. Due to the low concentration of these materials, thecurrent recycling processes available for LEDs have a significant recovery limitation. This study proposesan innovative, clean and effective physical method to segregate the valuable and critical materials intodifferent fractions while enhancing their concentration: particle size separation followed by electrostaticseparation. After the determination of the best electrostatic separation conditions (varying tension androtation) for each particle size, the final fractions were characterized by acid digestion and ICP-OES anal-ysis. The analysis revealed that the economically valuable elements gold, silver, copper and tin becameconcentrated in the conductive fractions (80.18%, 94.22%, 96.55% and 93.29% of their total recoveredmass, respectively), while the strategic critical elements, gallium, cerium and yttrium became concen-trated in the non-conductive fractions (96.15%, 100% and 95.20% of their total recovered mass, respec-tively). Despite some limitations imposed by the mass losses, this novel route may be important touncover new recycling alternatives, mainly for critical elements, and to improve the economic viabilityof the recycling routes. |
publishDate |
2021 |
dc.date.accessioned.fl_str_mv |
2021-01-13T04:10:36Z |
dc.date.issued.fl_str_mv |
2021 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/217257 |
dc.identifier.issn.pt_BR.fl_str_mv |
0956-053X |
dc.identifier.nrb.pt_BR.fl_str_mv |
001121045 |
identifier_str_mv |
0956-053X 001121045 |
url |
http://hdl.handle.net/10183/217257 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Waste Management [recurso eletrônico]. Amsterdam. Vol. 120 (Feb. 2021), p. 136-145 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
instname_str |
Universidade Federal do Rio Grande do Sul (UFRGS) |
instacron_str |
UFRGS |
institution |
UFRGS |
reponame_str |
Repositório Institucional da UFRGS |
collection |
Repositório Institucional da UFRGS |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/217257/2/001121045.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/217257/1/001121045.pdf |
bitstream.checksum.fl_str_mv |
24a8df838c7a98d6aeeae9f76bf027e4 579d0c836492dd52b4d79fffcee59156 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1801225006711046144 |