Influence of temperature and holding time on formation of hexavalent chromium during combustion of leather

Detalhes bibliográficos
Autor(a) principal: Manuel Fonseca Almeida
Data de Publicação: 1999
Outros Autores: M. J. Ferreira, T. Pinto
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/10216/21130
Resumo: Previous studies indicated that Cr(VI) was not detected or was below 5 mg/kg in tanned leather scraps. However, after they are burned, the resulting ashes contain meaningful amounts of Cr(VI) that depend on the burning temperature. Furthermore, results obtained at the same ignition temperature, but different holding times, show high variability.(1-3) This paper presents experimental results that confirm the Cr(III) to Cr(VI) transformation during chromium tanned leather combustion and its dependence on temperature and time, thus finding an explanation for variability of the results published before.
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spelling Influence of temperature and holding time on formation of hexavalent chromium during combustion of leatherPrevious studies indicated that Cr(VI) was not detected or was below 5 mg/kg in tanned leather scraps. However, after they are burned, the resulting ashes contain meaningful amounts of Cr(VI) that depend on the burning temperature. Furthermore, results obtained at the same ignition temperature, but different holding times, show high variability.(1-3) This paper presents experimental results that confirm the Cr(III) to Cr(VI) transformation during chromium tanned leather combustion and its dependence on temperature and time, thus finding an explanation for variability of the results published before.19991999-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10216/21130eng0144-0322Manuel Fonseca AlmeidaM. J. FerreiraT. Pintoinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-29T16:13:22Zoai:repositorio-aberto.up.pt:10216/21130Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:39:18.300900Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Influence of temperature and holding time on formation of hexavalent chromium during combustion of leather
title Influence of temperature and holding time on formation of hexavalent chromium during combustion of leather
spellingShingle Influence of temperature and holding time on formation of hexavalent chromium during combustion of leather
Manuel Fonseca Almeida
title_short Influence of temperature and holding time on formation of hexavalent chromium during combustion of leather
title_full Influence of temperature and holding time on formation of hexavalent chromium during combustion of leather
title_fullStr Influence of temperature and holding time on formation of hexavalent chromium during combustion of leather
title_full_unstemmed Influence of temperature and holding time on formation of hexavalent chromium during combustion of leather
title_sort Influence of temperature and holding time on formation of hexavalent chromium during combustion of leather
author Manuel Fonseca Almeida
author_facet Manuel Fonseca Almeida
M. J. Ferreira
T. Pinto
author_role author
author2 M. J. Ferreira
T. Pinto
author2_role author
author
dc.contributor.author.fl_str_mv Manuel Fonseca Almeida
M. J. Ferreira
T. Pinto
description Previous studies indicated that Cr(VI) was not detected or was below 5 mg/kg in tanned leather scraps. However, after they are burned, the resulting ashes contain meaningful amounts of Cr(VI) that depend on the burning temperature. Furthermore, results obtained at the same ignition temperature, but different holding times, show high variability.(1-3) This paper presents experimental results that confirm the Cr(III) to Cr(VI) transformation during chromium tanned leather combustion and its dependence on temperature and time, thus finding an explanation for variability of the results published before.
publishDate 1999
dc.date.none.fl_str_mv 1999
1999-01-01T00:00:00Z
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dc.identifier.uri.fl_str_mv https://hdl.handle.net/10216/21130
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dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0144-0322
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dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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