Recovering lead from cupel waste generated in gold analysis by Pb-Fire assay.
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFOP |
Texto Completo: | http://www.repositorio.ufop.br/handle/123456789/9603 https://doi.org/10.1016/j.jenvman.2016.08.052 |
Resumo: | Because of its precision and accuracy, Pb-Fire assay is the most employed method for gold analysis in geological materials. At the second stage of the method, namely cupellation, lead is oxidized to PbO which is absorbed by the cupel, leading to metallic gold as a tiny bend at the bottom of the recipient. After cupellation, cupel becomes highly contaminated with lead, making its disposal a serious risk of environmental contamination. In the present work, a leaching process for removing lead from cupel waste is proposed, which allowed for removing 96% of PbO by weight. After a precipitation step, 92.0% of lead was recovered from leachates in the form of PbSO4. Lead in the solid wastes left by the extraction was above the limit established by Brazilian legislation and these were classified as non-hazardous. Finally, secondary effluents generated after the precipitation step presented lead content more than twenty times lower than that of leachates from cupel waste. Tons of cupel waste are annually generated from gold analysis by Pb-Fire assay. Thus, the proposed method can contribute to prevent the discharge of high amounts of lead into the environment. Also, recovery of lead can help to partially meet the industrial demand for lead compounds. |
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Cerceau, Cristiane IsaacCarvalho, Cornélio de FreitasRabelo, Ana Carolina SilveiraVarejão, Eduardo Vinícius Vieira2018-03-13T14:39:16Z2018-03-13T14:39:16Z2016CERCEAU, C. I. et al. Recovering lead from cupel waste generated in gold analysis by Pb-Fire assay. Journal of Environmental Management, v. 183, p. 771-776, 2016. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0301479716305904?via%3Dihub>. Acesso em: 15 set. 2017.0301-4797http://www.repositorio.ufop.br/handle/123456789/9603https://doi.org/10.1016/j.jenvman.2016.08.052Because of its precision and accuracy, Pb-Fire assay is the most employed method for gold analysis in geological materials. At the second stage of the method, namely cupellation, lead is oxidized to PbO which is absorbed by the cupel, leading to metallic gold as a tiny bend at the bottom of the recipient. After cupellation, cupel becomes highly contaminated with lead, making its disposal a serious risk of environmental contamination. In the present work, a leaching process for removing lead from cupel waste is proposed, which allowed for removing 96% of PbO by weight. After a precipitation step, 92.0% of lead was recovered from leachates in the form of PbSO4. Lead in the solid wastes left by the extraction was above the limit established by Brazilian legislation and these were classified as non-hazardous. Finally, secondary effluents generated after the precipitation step presented lead content more than twenty times lower than that of leachates from cupel waste. Tons of cupel waste are annually generated from gold analysis by Pb-Fire assay. Thus, the proposed method can contribute to prevent the discharge of high amounts of lead into the environment. Also, recovery of lead can help to partially meet the industrial demand for lead compounds.O periódico Journal of Environmental Management concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 4210801282604.info:eu-repo/semantics/openAccessCupellationLeachingRecovering lead from cupel waste generated in gold analysis by Pb-Fire assay.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPLICENSElicense.txtlicense.txttext/plain; charset=utf-8924http://www.repositorio.ufop.br/bitstream/123456789/9603/2/license.txt62604f8d955274beb56c80ce1ee5dcaeMD52ORIGINALARTIGO_RecoveringLeadCupel.pdfARTIGO_RecoveringLeadCupel.pdfapplication/pdf446853http://www.repositorio.ufop.br/bitstream/123456789/9603/1/ARTIGO_RecoveringLeadCupel.pdfe6d1326a0628e864f9cfcf8e6f208eafMD51123456789/96032020-03-16 08:05:47.522oai:localhost: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ório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332020-03-16T12:05:47Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false |
dc.title.pt_BR.fl_str_mv |
Recovering lead from cupel waste generated in gold analysis by Pb-Fire assay. |
title |
Recovering lead from cupel waste generated in gold analysis by Pb-Fire assay. |
spellingShingle |
Recovering lead from cupel waste generated in gold analysis by Pb-Fire assay. Cerceau, Cristiane Isaac Cupellation Leaching |
title_short |
Recovering lead from cupel waste generated in gold analysis by Pb-Fire assay. |
title_full |
Recovering lead from cupel waste generated in gold analysis by Pb-Fire assay. |
title_fullStr |
Recovering lead from cupel waste generated in gold analysis by Pb-Fire assay. |
title_full_unstemmed |
Recovering lead from cupel waste generated in gold analysis by Pb-Fire assay. |
title_sort |
Recovering lead from cupel waste generated in gold analysis by Pb-Fire assay. |
author |
Cerceau, Cristiane Isaac |
author_facet |
Cerceau, Cristiane Isaac Carvalho, Cornélio de Freitas Rabelo, Ana Carolina Silveira Varejão, Eduardo Vinícius Vieira |
author_role |
author |
author2 |
Carvalho, Cornélio de Freitas Rabelo, Ana Carolina Silveira Varejão, Eduardo Vinícius Vieira |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Cerceau, Cristiane Isaac Carvalho, Cornélio de Freitas Rabelo, Ana Carolina Silveira Varejão, Eduardo Vinícius Vieira |
dc.subject.por.fl_str_mv |
Cupellation Leaching |
topic |
Cupellation Leaching |
description |
Because of its precision and accuracy, Pb-Fire assay is the most employed method for gold analysis in geological materials. At the second stage of the method, namely cupellation, lead is oxidized to PbO which is absorbed by the cupel, leading to metallic gold as a tiny bend at the bottom of the recipient. After cupellation, cupel becomes highly contaminated with lead, making its disposal a serious risk of environmental contamination. In the present work, a leaching process for removing lead from cupel waste is proposed, which allowed for removing 96% of PbO by weight. After a precipitation step, 92.0% of lead was recovered from leachates in the form of PbSO4. Lead in the solid wastes left by the extraction was above the limit established by Brazilian legislation and these were classified as non-hazardous. Finally, secondary effluents generated after the precipitation step presented lead content more than twenty times lower than that of leachates from cupel waste. Tons of cupel waste are annually generated from gold analysis by Pb-Fire assay. Thus, the proposed method can contribute to prevent the discharge of high amounts of lead into the environment. Also, recovery of lead can help to partially meet the industrial demand for lead compounds. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016 |
dc.date.accessioned.fl_str_mv |
2018-03-13T14:39:16Z |
dc.date.available.fl_str_mv |
2018-03-13T14:39:16Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
CERCEAU, C. I. et al. Recovering lead from cupel waste generated in gold analysis by Pb-Fire assay. Journal of Environmental Management, v. 183, p. 771-776, 2016. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0301479716305904?via%3Dihub>. Acesso em: 15 set. 2017. |
dc.identifier.uri.fl_str_mv |
http://www.repositorio.ufop.br/handle/123456789/9603 |
dc.identifier.issn.none.fl_str_mv |
0301-4797 |
dc.identifier.doi.none.fl_str_mv |
https://doi.org/10.1016/j.jenvman.2016.08.052 |
identifier_str_mv |
CERCEAU, C. I. et al. Recovering lead from cupel waste generated in gold analysis by Pb-Fire assay. Journal of Environmental Management, v. 183, p. 771-776, 2016. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0301479716305904?via%3Dihub>. Acesso em: 15 set. 2017. 0301-4797 |
url |
http://www.repositorio.ufop.br/handle/123456789/9603 https://doi.org/10.1016/j.jenvman.2016.08.052 |
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eng |
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