Reference : Copper extraction from coarsely ground printed circuit boards using moderate thermoph...
Scientific journals : Article
Engineering, computing & technology : Multidisciplinary, general & others
http://hdl.handle.net/2268/183450
Copper extraction from coarsely ground printed circuit boards using moderate thermophilic bacteria in a rotating-drum reactor
English
Rodrigues, Michael []
Leão, Versiane []
Gomes, Otavio []
Lambert, Fanny mailto [Université de Liège > Département ArGEnCo > Traitement et recyclage des matières minérales >]
Bastin, David mailto [Université de Liège > Département ArGEnCo > Géoressources minérales & Imagerie géologique >]
Gaydardzhiev, Stoyan mailto [Université de Liège > Département ArGEnCo > Traitement et recyclage des matières minérales >]
Apr-2015
Waste Management
Pergamon Press - An Imprint of Elsevier Science
41
148-158
Yes (verified by ORBi)
0956-053X
Oxford
United Kingdom
[en] e-waste ; Bioleaching ; reactor
[en] 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.
http://hdl.handle.net/2268/183450
10.1016/j.wasman.2015.04.001
http://dx.doi.org/10.1016/j.wasman.2015.04.001

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
1-s2.0-S0956053X1500238X-main.pdfAuthor postprint2.52 MBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.