Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/6771
Title: Copper extraction from coarsely ground printed circuit boards using moderate thermophilic bacteria in a rotating-drum reactor.
Authors: Rodrigues, Michael Leonardo Marques
Leão, Versiane Albis
Gomes, Otavio
Lambert, Fanny
Bastin, David
Gaydardzhiev, Stoyan
Keywords: Bioleaching
Copper
Sulfobacillus thermosulfidooxidans
Rotating-drum reactor
Issue Date: 2015
Citation: RODRIGUES, M. L. M. et al. Copper extraction from coarsely ground printed circuit boards using moderate thermophilic bacteria in a rotating-drum reactor. Waste Management, Elmsford, v. 41, p. 148-158, 2015. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0956053X1500238X>. Acesso em: 11 jul. 2016.
Abstract: The current work reports on a new approach for copper bioleaching from Printed Circuit Board (PCB) by moderate thermophiles in a rotating-drum reactor. Initially leaching of PCB was carried out in shake flasks to assess the effects of particle size (_208 lm + 147 lm), ferrous iron concentration (1.25–10.0 g/L) and pH (1.5–2.5) on copper leaching using mesophile and moderate thermophile microorganisms. Only at a relatively low solid content (10.0 g/L) complete copper extraction was achieved from the particle size investigated. Conversely, high copper extractions were possible from coarse-ground PCB (20 mm-long) working with increased solids concentration (up to 25.0 g/L). Because there was as the faster leaching kinetics at 50 _C Sulfobacillus thermosulfidooxidans was selected for experiments in a rotating-drum reactor with the coarser-sized PCB sheets. Under optimal conditions, copper extraction reached 85%, in 8 days and microscopic observations by SEM–EDS of the on nonleached and leached material suggested that metal dissolution from the internal layers was restricted by the fact that metal surface was not entirely available and accessible for the solution in the case of the 20 mm-size sheets.
URI: http://www.repositorio.ufop.br/handle/123456789/6771
metadata.dc.identifier.doi: https://doi.org/10.1016/j.wasman.2015.04.001
ISSN: 0956-053X
metadata.dc.rights.license: O periódico Waste Management concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3914200051842.
Appears in Collections:DEMET - Artigos publicados em periódicos

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