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

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

Autores

Ferreira, MJ (Autor) Outra; Manuel Fonseca Almeida (Autor) FEUP; Pinto, T (Autor) Outra

Revista

Título: Journal of the Society of Leather Technologies and Chemists

Vol. 83

Páginas: 135-138

ISSN: 0144-0322

Editora: Society of Leather Technologists and Chemists

Indexação

ISI Web of Knowledge - 13 Citações

Scopus - 16 Citações

Outras Informações

ID Authenticus: P-001-4FG

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

Nº de páginas: 4