Lead hazard evaluation for cathode ray tube monitors in Brazil

Detalhes bibliográficos
Autor(a) principal: Dias, Pablo Ribeiro
Data de Publicação: 2018
Outros Autores: Oliveira, Erich Lopes Braitback de, Veit, Hugo Marcelo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/188599
Resumo: Cathode ray tube (CRT) monitors are electronic equipment mainly made of glass, polymers and metals. These devices became obsolete because of emerging technologies such as LCD, LED and plasma; thus generating a huge stockpile of e-waste worldwide. In this CRT study, a natural leaching simulation (NBR10005) was performed to determine the toxicity of this e-waste. The standard NBR 10005 procedure was performed for 7 different monitors. The results show all samples are hazardous according to local environmental law (NBR 10004) due to lead leaching. The CRT panel is lead free, while the CRT funnel and neck have about 20% of lead oxide in their composition. Moreover, six optimum thermal lead removal procedures were performed and the NBR 10005 procedure was repeated. The results reveal that vacuum atmosphere and the addition of 5% carbon graphite as reducing agent are optimum conditions to turn the CRT into a non-hazardous waste. Three out of six parameters were capable of satisfactorily removing the lead and turning the post-procedure waste lead-leaching safe.
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spelling Dias, Pablo RibeiroOliveira, Erich Lopes Braitback deVeit, Hugo Marcelo2019-02-08T02:32:43Z20180104-6632http://hdl.handle.net/10183/188599001086962Cathode ray tube (CRT) monitors are electronic equipment mainly made of glass, polymers and metals. These devices became obsolete because of emerging technologies such as LCD, LED and plasma; thus generating a huge stockpile of e-waste worldwide. In this CRT study, a natural leaching simulation (NBR10005) was performed to determine the toxicity of this e-waste. The standard NBR 10005 procedure was performed for 7 different monitors. The results show all samples are hazardous according to local environmental law (NBR 10004) due to lead leaching. The CRT panel is lead free, while the CRT funnel and neck have about 20% of lead oxide in their composition. Moreover, six optimum thermal lead removal procedures were performed and the NBR 10005 procedure was repeated. The results reveal that vacuum atmosphere and the addition of 5% carbon graphite as reducing agent are optimum conditions to turn the CRT into a non-hazardous waste. Three out of six parameters were capable of satisfactorily removing the lead and turning the post-procedure waste lead-leaching safe.application/pdfengBrazilian journal of chemical engineering. São Paulo. Vol. 35, no. 1 (Jan./Mar. 2018), p. 43-49Tubos de raios catódicosChumboReciclagemLixo eletrônicoCathode ray tubeComputer monitorLead removalRecyclingWEEELead hazard evaluation for cathode ray tube monitors in Brazilinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001086962.pdf.txt001086962.pdf.txtExtracted Texttext/plain21107http://www.lume.ufrgs.br/bitstream/10183/188599/2/001086962.pdf.txt86125ec33bde0f4df2d6bae6042f5b85MD52ORIGINAL001086962.pdfTexto completo (inglês)application/pdf1173969http://www.lume.ufrgs.br/bitstream/10183/188599/1/001086962.pdfc9ea04a525e5dabcf6f7d8c563bd8b62MD5110183/1885992019-08-29 02:34:52.131818oai:www.lume.ufrgs.br:10183/188599Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2019-08-29T05:34:52Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Lead hazard evaluation for cathode ray tube monitors in Brazil
title Lead hazard evaluation for cathode ray tube monitors in Brazil
spellingShingle Lead hazard evaluation for cathode ray tube monitors in Brazil
Dias, Pablo Ribeiro
Tubos de raios catódicos
Chumbo
Reciclagem
Lixo eletrônico
Cathode ray tube
Computer monitor
Lead removal
Recycling
WEEE
title_short Lead hazard evaluation for cathode ray tube monitors in Brazil
title_full Lead hazard evaluation for cathode ray tube monitors in Brazil
title_fullStr Lead hazard evaluation for cathode ray tube monitors in Brazil
title_full_unstemmed Lead hazard evaluation for cathode ray tube monitors in Brazil
title_sort Lead hazard evaluation for cathode ray tube monitors in Brazil
author Dias, Pablo Ribeiro
author_facet Dias, Pablo Ribeiro
Oliveira, Erich Lopes Braitback de
Veit, Hugo Marcelo
author_role author
author2 Oliveira, Erich Lopes Braitback de
Veit, Hugo Marcelo
author2_role author
author
dc.contributor.author.fl_str_mv Dias, Pablo Ribeiro
Oliveira, Erich Lopes Braitback de
Veit, Hugo Marcelo
dc.subject.por.fl_str_mv Tubos de raios catódicos
Chumbo
Reciclagem
Lixo eletrônico
topic Tubos de raios catódicos
Chumbo
Reciclagem
Lixo eletrônico
Cathode ray tube
Computer monitor
Lead removal
Recycling
WEEE
dc.subject.eng.fl_str_mv Cathode ray tube
Computer monitor
Lead removal
Recycling
WEEE
description Cathode ray tube (CRT) monitors are electronic equipment mainly made of glass, polymers and metals. These devices became obsolete because of emerging technologies such as LCD, LED and plasma; thus generating a huge stockpile of e-waste worldwide. In this CRT study, a natural leaching simulation (NBR10005) was performed to determine the toxicity of this e-waste. The standard NBR 10005 procedure was performed for 7 different monitors. The results show all samples are hazardous according to local environmental law (NBR 10004) due to lead leaching. The CRT panel is lead free, while the CRT funnel and neck have about 20% of lead oxide in their composition. Moreover, six optimum thermal lead removal procedures were performed and the NBR 10005 procedure was repeated. The results reveal that vacuum atmosphere and the addition of 5% carbon graphite as reducing agent are optimum conditions to turn the CRT into a non-hazardous waste. Three out of six parameters were capable of satisfactorily removing the lead and turning the post-procedure waste lead-leaching safe.
publishDate 2018
dc.date.issued.fl_str_mv 2018
dc.date.accessioned.fl_str_mv 2019-02-08T02:32:43Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/188599
dc.identifier.issn.pt_BR.fl_str_mv 0104-6632
dc.identifier.nrb.pt_BR.fl_str_mv 001086962
identifier_str_mv 0104-6632
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url http://hdl.handle.net/10183/188599
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Brazilian journal of chemical engineering. São Paulo. Vol. 35, no. 1 (Jan./Mar. 2018), p. 43-49
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