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Bioleaching of metalsfrom secondarymaterials usingglycolipidbiosurfactants Martijn CasteleinFlorian VerbruggenLisa Van Renterghem2021 год

Bioleaching of metals from secondary materials using glycolipid biosurfactants
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Аннотация: With 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 the dominant Fe-silicate matrix. 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.
Год издания: 2021
Авторы: Martijn Castelein, Florian Verbruggen, Lisa Van Renterghem, Jeroen Spooren, Lourdes Yurramendi, Gijs Du Laing, Nico Boon, Wim Soetaert, Tom Hennebel, Sophie Roelants, Adam J. Williamson
Издательство: Elsevier BV
Источник: Minerals Engineering
Ключевые слова: Metal Extraction and Bioleaching, Mineral Processing and Grinding, Extraction and Separation Processes
Другие ссылки: Minerals Engineering (HTML)
Ghent University Academic Bibliography (Ghent University) (HTML)
Ghent University Academic Bibliography (Ghent University) (PDF)
Ghent University Academic Bibliography (Ghent University) (HTML)
Ghent University Academic Bibliography (Ghent University) (PDF)
Ghent University Academic Bibliography (Ghent University) (HTML)
Ghent University Academic Bibliography (Ghent University) (HTML)