Microbial contact enhances bioleaching of rare earth elements
作者： Thomas Becker , Jacques J. Eksteen , Anna H. Kaksonen , Elizabeth L.J. Watkin , Homayoun Fathollahzadeh
DOI: 10.1016/J.BITEB.2018.07.004
关键词: Phosphate 、 Bioleaching 、 Bacteria 、 Rare earth 、 Leaching (metallurgy) 、 Dissolution 、 Monazite 、 Enterobacter aerogenes 、 Environmental chemistry 、 Chemistry
摘要: Abstract The mobility of rare earth elements (REEs) in monazite depends on microbial activity, attachment bacteria the mineral surface, phase association REEs, and which physiochemical biological processes these phases are subjected to. To better understand role phosphate solubilising bacterium, Enterobacter aerogenes, REEs leaching, a series dissolution experiments was performed. contact with demonstrated to be advantageous for bioleaching even though same types organic acids similar concentrations were present during non-contact leaching. Monazite observed decrease following order: Biotic contact ≫ Biotic non-contact ≫ Spent media ≈ Abiotic at 30 °C. surface by co-localised atomic force microscopy (AFM) confocal Raman (CRM) indicated no preferential specific site surface.
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