Reference : COPPER LEACHING FROM WASTE ELECTRIC CABLES BY BIOHYDROMETALLURGY
Scientific journals : Article
Engineering, computing & technology : Geological, petroleum & mining engineering
http://hdl.handle.net/2268/178909
COPPER LEACHING FROM WASTE ELECTRIC CABLES BY BIOHYDROMETALLURGY
English
Lambert, Fanny mailto [Université de Liège - ULiège > Département ArGEnCo > Traitement et recyclage des matières minérales >]
Bastin, David mailto [Université de Liège - ULiège > Département ArGEnCo > Géoressources minérales & Imagerie géologique >]
Gaydardzhiev, Stoyan mailto [Université de Liège - ULiège > Département ArGEnCo > Traitement et recyclage des matières minérales >]
Léonard, Grégoire mailto [Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Procédés et développement durable >]
Lewis, Gregory []
Bareel, Pierre-François []
13-Jan-2015
Minerals Engineering
Pergamon Press - An Imprint of Elsevier Science
Yes (verified by ORBi)
International
0892-6875
Oxford
United Kingdom
[en] Recycling ; electric cables ; leaching ; bioleaching ; copper ; Acidithiobacillus ferrooxidans
[en] This study examines the leaching of copper from waste electric cables by chemical leaching and leaching catalysed by Acidithiobacillus ferrooxidans in terms of leaching kinetics and reagents consumption. Operational parameters such as the nature of the oxidant (Fe3+, O2), the initial ferric iron concentration (0-10 g/L) and the temperature (21-50°C) were identified to have an important influence on the degree of copper solubilisation. At optimal process conditions, copper extraction above 90% was achieved in both leaching systems, with a leaching duration of 1 day. The bacterial leaching system slightly outperformed the chemical one but the positive effect of regeneration of Fe3+ was limited. It appears that the Fe2+ bio-oxidation is not sufficiently optimised. Best results in terms of copper solubilisation kinetics were obtained for the abiotic test at 50°C and for the biotic test at 35°C. Moreover, the study showed that in same operating conditions, a lower acid consumption was recorded for the biotic test than for the abiotic test.
F.R.S.-FNRS - Fonds de la Recherche Scientifique
Researchers
http://hdl.handle.net/2268/178909

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