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

• Tipo: Artigo em Revista Científica Internacional
• Data: 1999

Autores

Manuel Fonseca Almeida (Autor) FEUP; M. J. Ferreira (Autor) Outra; T. Pinto (Autor) Outra

Revista

Título: Journal of the Society of Leather Technologies and Chemists

Vol. 83 Nº 3

Página Inicial: 135

ISSN: 0144-0322

Editora: Society of Leather Technologists and Chemists

Indexação

ISI Web of Science

Scopus

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Outras Informações

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica