Microbial contact enhances bioleaching of rare earth elements
MetadataShow full item record
The mobility of rare earth elements (REEs) in monazite depends on microbial activity, attachment of bacteria on the mineral surface, phase association of the REEs, and which physiochemical and biological processes these phases are subjected to. To better understand the role of the phosphate solubilising bacterium, Enterobacter aerogenes, in REEs leaching, a series of monazite dissolution experiments was performed. The contact of bacteria with monazite was demonstrated to be advantageous for REEs bioleaching even though the same types of organic acids with similar concentrations were present during non-contact leaching. Monazite dissolution was observed to decrease in the following order: Biotic contact ≫ Biotic non-contact ≫ Spent media ≈ Abiotic at 30 °C. The attachment of bacteria on monazite surface by a co-localised atomic force microscopy (AFM) and confocal Raman microscopy (CRM) indicated no preferential attachment of bacteria to specific site on the monazite surface.
Showing items related by title, author, creator and subject.
Schwarz, Karen Rosemary (2012)A research project was undertaken to study the effect of biosolids on the decay times of enteric pathogens in the soil. This is the most comprehensive study in Australia where the persistence of enteric microorganisms in ...
Reactions destroying detrital monazite in greenschist-facies sandstones from the Witwatersrand basin, South AfricaRasmussen, Birger; Muhling, J. (2009)Detrital monazite in sandstone and conglomerate from the Witwatersrand Supergroup, South Africa, displays reaction textures indicating that monazite has undergone replacement after sediment deposition, and most probably ...
Attachment of different Salmonella serovars to materials commonly used in a poultry processing plantChia, T.; Goulter, R.; McMeekin, T.; Dykes, Gary; Fegan, N. (2009)Salmonella can adhere to poultry and food contact surfaces and persist to cause diseases. Adhesion of Salmonella Sofia (n = 14), S. Typhimurium (n = 6), S. Infantis (n = 3) and S. Virchow (n = 2) to Teflon®, stainless ...