Abstract
Application of Raman Micro Spectroscopy and Micro-FTIR Mapping in the Bio-Hydrometallurgy of Copper Sulfide-Minerals
Highlights
New methods for maximizing copper extraction from whole ores and processing tails and sensory technologies for daily monitoring have been developed (Figure 1)
Raman spectra including the images can provide the information for identification of surface species/phases and spatial variations in composition of the bioleaching of chalcopyrite as well the formation of the passivation layers in Cu/Fe/S and Cu/S systems. (Figure 2) spectrum A, shows the Raman spectra of bornite and the 1-6 months bioleached bornite samples by a consortium of microorganisms consisted of Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, Acidithiobacillus caldus, Leptospirillum ferriphilum, Leptospirillum ferroodiazotrophum and Sulfobacillus thermosulfidooxidans
FTIR is well established as a method for studying solid state transformations in minerals and bio minerals and micro-FTIR extends this functionality to include spectroscopic mapping at the micrometer length scale
Summary
New methods for maximizing copper extraction from whole ores and processing tails and sensory technologies for daily monitoring have been developed (Figure 1). A combined application of μm-FTIR mapping and Raman microspectroscopy for the bioleaching behaviour of copper sulfide minerals such as chalcopyrite, bornite, chalcocite and covellite provides valuable information on the whole bio-hydrometallurgy Cu/Fe/S system. It has been suggested that the primary oxidation product of chalcopyrite leaching is chalcocite which is subsequently oxidized to covellite [2].The formation of the latter is confirmed by ore microscopy and by a number of structure sensitive techniques such as Raman and FTIR [1,2].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
