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Title: Rendering wastes obtained from gold analysis by the lead-fusion fire-assay method non-hazardous.
Authors: Magalhães, Fernanda Batalha de
Carvalho, Cornélio de Freitas
Carvalho, Eduardo Lyse Corrêa Netto
Yoshida, Maria Irene
Santos, Cláudio Gouvêa dos
Keywords: Lead
Crucible waste
Chemical precipitation
Issue Date: 2012
Citation: MAGALHÃES, F. B. et al. Rendering wastes obtained from gold analysis by the lead-fusion fire-assay method non-hazardous. Journal of Environmental Management, v. 110, p. 110-115, 2012. Disponível em: <>. Acesso em: 02 fev. 2015.
Abstract: The classical method of melting lead by fire-assay (Pb-FA) is the most frequently used analytical technique in gold prospection. The crucible solid waste which is generated in this process is usually characterized by chemical and mineralogical composition, granulometric size distribution, and classified according to Brazilian Environmental Regulations. This study demonstrates how acid leaching can be used to remove lead from waste originally classified as hazardous by treatment with hydrochloric and nitric acids followed by chemical precipitation in sodium metasilicate solution. It is shown that for every 1000 kg of hazardous waste, 995.6 kg of nonharzardous waste can be recovered.
ISSN: 0301-4797
metadata.dc.rights.license: O periódico Journal of Environmental Management concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3577131007337.
Appears in Collections:DEQUI - Artigos publicados em periódicos

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