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dc.contributor.authorCastelein, Martijn
dc.contributor.authorVerbruggen, Florian
dc.contributor.authorVan Renterghem, Lisa
dc.contributor.authorSpooren, Jeroen
dc.contributor.authorYurramendi, Lourdes
dc.contributor.authorDu Laing, Gijs
dc.contributor.authorBoon, Nico
dc.contributor.authorSoetaert, Wim
dc.contributor.authorHennebel, Tom
dc.contributor.authorRoelants, Sophie
dc.contributor.authorWilliamson, Adam J.
dc.date.accessioned2021-01-28T11:55:22Z
dc.date.available2021-01-28T11:55:22Z
dc.date.issued2021-03
dc.identifier.citationMartijn Castelein, Florian Verbruggen, Lisa Van Renterghem, Jeroen Spooren, Lourdes Yurramendi, Gijs Du Laing, Nico Boon, Wim Soetaert, Tom Hennebel, Sophie Roelants, Adam J. Williamson, Bioleaching of metals from secondary materials using glycolipid biosurfactants, Minerals Engineering, Volume 163, 2021, 106665, ISSN 0892-6875, https://doi.org/10.1016/j.mineng.2020.106665.
dc.identifier.issn0892-6875
dc.identifier.urihttp://hdl.handle.net/11556/1069
dc.description.abstractWith the global demand for economically important metals increasing, compounded by the depletion of readily accessible ores, secondary resources and low-grade ores are being targeted to meet growing demands. Novel technologies developed within biobased industries, such as microbial biosurfactants, could be implemented to improve the sustainability of traditional hydrometallurgy techniques. This study investigates newly developed microbial biosurfactants (acidic- and bolaform glycolipids) for the leaching of metals (particularly Cu and Zn) from a suite of mine tailings, metallurgical sludges and automotive shredder residues. Generally, acidic sophorolipids were the most performant, and optimal Cu leaching was observed from a fayalite slag (27%) and a copper sulfide mine tailing (53%). Further investigation of the leached fayalite material showed that leaching was occurring from small metallic Cu droplets in this material via a corrosion-based mechanism, and/or from Cu-Pb sulfides, selective against dominant Fe-silicate matrices. This study highlights that acidic sophorolipid microbial biosurfactants have the potential to leach Cu and Zn from low-grade secondary materials. It also provides important fundamental insights into biosurfactant-metal and mineral interactions that are currently unexplored. Together, the convergence of leaching and mining industries with bio-industries can improve material recovery and will positively impact the bio- and circular economies and the environment.en
dc.description.sponsorshipThe authors thank Bio Base Europe Pilot plant for supplying the biosurfactants that enabled the execution of the leaching experiments. We also thank Joachim Neri, Karel Folens, Nina Ricci Nicomel and Melgü Kizilmese for their assistance during ICP-analyses.en
dc.language.isoengen
dc.publisherElsevier Ltden
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleBioleaching of metals from secondary materials using glycolipid biosurfactantsen
dc.typearticleen
dc.identifier.doi10.1016/j.mineng.2020.106665en
dc.rights.accessRightsopenAccessen
dc.subject.keywordsSophorolipidsen
dc.subject.keywordsBioleachingen
dc.subject.keywordsHeavy metal recoveryen
dc.subject.keywordsFayaliteen
dc.subject.keywordsCopperen
dc.journal.titleMinerals Engineeringen
dc.page.initial106665en
dc.volume.number163


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