Gold recovery from printed circuit boards of mobile phones scraps using a leaching solution alternative to cyanide

Detalhes bibliográficos
Autor(a) principal: Kasper, Angela Cristina
Data de Publicação: 2018
Outros Autores: Veit, Hugo Marcelo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/216604
Resumo: Currently, the printed circuit boards (PCB) of waste electrical and electronic equipment (WEEE) are attracting interest among researchers for environmental concern reasons and mainly for their content of precious metals such as gold. Thus, this study aims to characterize different types of PCBs from mobile phones in relation to the amount of gold contained, to evaluate alternative leaching agents for the gold (ammonium and sodium thiosulfate) and compare these to commercial stripping (cyanide-based) and then the recovery of gold by the electrometallurgical route. First, the amount of gold was determined. Then, alternative leaching agents were tested under different concentrations and time. A cyanide-based solution was also tested to compare the results. The results showed that the content of gold varied from 142 to 700 g/ton. The cyanide-based solution was able to extract 88% of the gold, while sodium and ammonium thiosulfate extracted 70 and 75% of the gold, respectively. The electrowinning tests showed a 94% recovery of the gold present in thiosulfate solutions.
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spelling Kasper, Angela CristinaVeit, Hugo Marcelo2020-12-17T04:09:44Z20180104-6632http://hdl.handle.net/10183/216604001119395Currently, the printed circuit boards (PCB) of waste electrical and electronic equipment (WEEE) are attracting interest among researchers for environmental concern reasons and mainly for their content of precious metals such as gold. Thus, this study aims to characterize different types of PCBs from mobile phones in relation to the amount of gold contained, to evaluate alternative leaching agents for the gold (ammonium and sodium thiosulfate) and compare these to commercial stripping (cyanide-based) and then the recovery of gold by the electrometallurgical route. First, the amount of gold was determined. Then, alternative leaching agents were tested under different concentrations and time. A cyanide-based solution was also tested to compare the results. The results showed that the content of gold varied from 142 to 700 g/ton. The cyanide-based solution was able to extract 88% of the gold, while sodium and ammonium thiosulfate extracted 70 and 75% of the gold, respectively. The electrowinning tests showed a 94% recovery of the gold present in thiosulfate solutions.application/pdfengBrazilian journal of chemical engineering. São Paulo, SP. Vol. 35, no. 3 (July/Sept. 2018), p. 931-942Ouro : RecuperaçãoHidrometalurgiaEletrometalurgiaPlaca de circuito impressoTiossulfatosGold RecoveryHydrometallurgyElectrometallurgyPrinted circuit boardsThiosulfateGold recovery from printed circuit boards of mobile phones scraps using a leaching solution alternative to cyanideinfo: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:UFRGSTEXT001119395.pdf.txt001119395.pdf.txtExtracted Texttext/plain40562http://www.lume.ufrgs.br/bitstream/10183/216604/2/001119395.pdf.txt3d03ef62660927bed3360ddcf3a3efa2MD52ORIGINAL001119395.pdfTexto completo (inglês)application/pdf1115293http://www.lume.ufrgs.br/bitstream/10183/216604/1/001119395.pdf0a355db0138787f18c4e2fefd34b52caMD5110183/2166042020-12-18 05:13:21.03428oai:www.lume.ufrgs.br:10183/216604Repositório InstitucionalPUBhttps://lume.ufrgs.br/oai/requestlume@ufrgs.bropendoar:2020-12-18T07:13:21Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Gold recovery from printed circuit boards of mobile phones scraps using a leaching solution alternative to cyanide
title Gold recovery from printed circuit boards of mobile phones scraps using a leaching solution alternative to cyanide
spellingShingle Gold recovery from printed circuit boards of mobile phones scraps using a leaching solution alternative to cyanide
Kasper, Angela Cristina
Ouro : Recuperação
Hidrometalurgia
Eletrometalurgia
Placa de circuito impresso
Tiossulfatos
Gold Recovery
Hydrometallurgy
Electrometallurgy
Printed circuit boards
Thiosulfate
title_short Gold recovery from printed circuit boards of mobile phones scraps using a leaching solution alternative to cyanide
title_full Gold recovery from printed circuit boards of mobile phones scraps using a leaching solution alternative to cyanide
title_fullStr Gold recovery from printed circuit boards of mobile phones scraps using a leaching solution alternative to cyanide
title_full_unstemmed Gold recovery from printed circuit boards of mobile phones scraps using a leaching solution alternative to cyanide
title_sort Gold recovery from printed circuit boards of mobile phones scraps using a leaching solution alternative to cyanide
author Kasper, Angela Cristina
author_facet Kasper, Angela Cristina
Veit, Hugo Marcelo
author_role author
author2 Veit, Hugo Marcelo
author2_role author
dc.contributor.author.fl_str_mv Kasper, Angela Cristina
Veit, Hugo Marcelo
dc.subject.por.fl_str_mv Ouro : Recuperação
Hidrometalurgia
Eletrometalurgia
Placa de circuito impresso
Tiossulfatos
topic Ouro : Recuperação
Hidrometalurgia
Eletrometalurgia
Placa de circuito impresso
Tiossulfatos
Gold Recovery
Hydrometallurgy
Electrometallurgy
Printed circuit boards
Thiosulfate
dc.subject.eng.fl_str_mv Gold Recovery
Hydrometallurgy
Electrometallurgy
Printed circuit boards
Thiosulfate
description Currently, the printed circuit boards (PCB) of waste electrical and electronic equipment (WEEE) are attracting interest among researchers for environmental concern reasons and mainly for their content of precious metals such as gold. Thus, this study aims to characterize different types of PCBs from mobile phones in relation to the amount of gold contained, to evaluate alternative leaching agents for the gold (ammonium and sodium thiosulfate) and compare these to commercial stripping (cyanide-based) and then the recovery of gold by the electrometallurgical route. First, the amount of gold was determined. Then, alternative leaching agents were tested under different concentrations and time. A cyanide-based solution was also tested to compare the results. The results showed that the content of gold varied from 142 to 700 g/ton. The cyanide-based solution was able to extract 88% of the gold, while sodium and ammonium thiosulfate extracted 70 and 75% of the gold, respectively. The electrowinning tests showed a 94% recovery of the gold present in thiosulfate solutions.
publishDate 2018
dc.date.issued.fl_str_mv 2018
dc.date.accessioned.fl_str_mv 2020-12-17T04:09:44Z
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/other
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/216604
dc.identifier.issn.pt_BR.fl_str_mv 0104-6632
dc.identifier.nrb.pt_BR.fl_str_mv 001119395
identifier_str_mv 0104-6632
001119395
url http://hdl.handle.net/10183/216604
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Brazilian journal of chemical engineering. São Paulo, SP. Vol. 35, no. 3 (July/Sept. 2018), p. 931-942
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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reponame_str Repositório Institucional da UFRGS
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