NDLI: Bioleaching of chalcopyrite by Leptospirillum ferriphilum

Content Provider	Springer Nature Link
Author	Hu, Ke ting Gu, Guo hua Li, Shuang ke Qiu, Guan zhou
Copyright Year	2012
Abstract	Chalcopyrite oxidation rates were examined under various conditions in the presence of Leptospirillum ferriphilum, in which the effects of different pulp content, inoculation amount, external addition of Fe$^{3+}$ and initial pH value were studied. The bioleaching residues were investigated by X-ray diffractograms (XRD), scanning electron microscopy (SEM) and energy dispersion spectrum (EDS) analysis. The results show that low pulp concentration increases the leaching rate of copper, and external addition of Fe$^{3+}$ is also beneficial to leaching chalcopyrite. The changes of inoculation amount and initial pH from 1.6 to 2.5 have a little effect on the final leaching rate. The results also imply that Fe$^{3+}$ ions are important for bioleaching of chalcopyrite. At the end of bioleaching, jarosite and sulfur are observed on the surface of chalcopyrite residues by using XRD, SEM and EDS. With the passivation layer formed by jarosite and sulfur, the continuous copper extraction is effectively blocked.
Starting Page	1718
Ending Page	1723
Page Count	6
File Format	PDF
ISSN	20952899
Journal	Journal of Central South University of Technology
Volume Number	19
Issue Number	6
e-ISSN	22275223
Language	English
Publisher	Central South University
Publisher Date	2012-06-03
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	chalcopyrite Leptospirillum ferriphilum bioleaching redox potential jarosite Metallic Materials Engineering
Content Type	Text
Resource Type	Article
Subject	Metals and Alloys Engineering

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